FORM ONE CHEMISTRY EXAMS SERIES

THE PRESIDENT’S OFFICE MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

CHEMISTRY FORM ONE

TIME: 2 HOURS NOVEMBER 2022

INSTRUCTIONS

1. This paper Consist of sections A, B and C with total of 10 questions

2. Answer all questions in both sections

3. All writings should be in blue/black ink

4. All diagrams should be drawn in pencil

5. Write your assessment number at the top right corner

SECTION A (15Marks)

1. For each of the items (i)-(x), choose the correct answer from among the given alternative and write its letter in the box provide.

  1. The welders prefers to use non luminous flame for their work simply because

(A)It is available (B) it is easy to transport

(C) produce very hot flame (D) can be made by kerosene

  1. Spatula in the laboratory is used for scoping what types of substances?

(A)Liquid and gases (B) solids and liquids

(C) Powdery and gases (D) Solids and powdery

  1. Why oxygen as one of the components of air Is unique?

(A)It has ability to burn (B) it support combustion

(C) it is diatonic gas (D) combine with carbon dioxide

  1. Why it is necessary to boil drinking water?

(A) To make it tasteless (B) To remove impurities

(C) to kill micro-organism (D) To make it taste less

  1. How do chemists refer to a mixture of milk and water?

(A)Miscible solution (B) Suspension (C) Immiscible solution (D) Emulsion

  1. How can one prevent rusting in fragile instruments like camera?

(A)By galvanization (B) By using silica gel (C)By using oil (D) By using ethanol

  1. Which of the following is not man-made product of applying chemistry?

(B) Sugar (B) Fertilizer (C) Milk (D) Vaccines

    li>Spatula in the laboratory is used for scoping what types of substances? (A)Liquid and gases (B) solids and liquids

(C) Powdery and gases (D) Solids and powdery

  1. Fractional distillation is possible if the mixture constituents differ in _______

A. Boiling points

B. Melting points

C. Vaporing points

D. Freezing points

  1. Which of the following is NOT among the composition of air?

A. Noble gases

B. Hydrogen

C. Carbon dioxide

D. Nitrogen

2. Match the descriptions in List Awith their corresponding answer in List Bby writing the letter of the correct response beside the item number in the answer booklets (s) provided.

SECTION B: (70 Marks)

Answer all questions in this section

3. (a) Suggest the best method of separating the following mixtures:

i. Ethanol and water__________________________________________

ii. Sodium chloride and water___________________________________

iii. Green solution form leaves___________________________________

iv. Sand from ice_____________________________________________

v. Iron feelings and calcium carbonate powder____________________

b) i. Why is zinc used as a coat for iron and not vice versa?

ii) Is water a mixture or a compound? Give two reasons to support your answer.

4. (a) Mrs. Msema kweli was addressing the villagers about use of water for economic values. What 4 values will she tell the villagers

(b) Is an air a mixture or a compound? Give 4 reasons

5. (a) Do your think there is any reasons for providing first Aid to the Victim? If yes give four reasons.

(b)State the uses of the following items in first aid Kit.

i. The pair of scissors

ii. The whistle

iii. Petroleum Jelly

iv. Sterile gauze

6. (a)Distinguish the following substances.

  1. Homogenous mixture from heterogeneous mixture.
  2. Miscible from immiscible liquids.
  3. Saturated from unsaturated solution.

(b)Give two chemical tests for pure water

7. (a) Water exists in three states of matter with two examples, mention three states

of matter.

(b) The figure below shows the relationships among the three states of matter. Name the process involved in A, B, C, D, Eand F.

ii. Mention one (1) Chemical test for water

8. (a) Briefly explain the uses of the following;

  1. Oxygen gas
  2. Carbon dioxide gas
  3. Nitrogen gas.

(b) Complete the following table

9. (a) What should you do immediately if:

(i) The piece of broken beaker cuts your finger

(ii) Chemicals splash on your face

(iii) Your shirt has caught fire

(iv) Your fellow student swallows unknown chemical substance thinking that it was water

(b) Why do you think first aid is an important thing? Give two points:

SECTION B: 15 MARKS

10. a) During the rains many rivers fill with muddy water, which people use for drinking. This water has caused them to suffer from water borne diseases such as typhoid and diarrhea. Explain two simple methods that can be used to obtain clean water from these rivers muddy water.

b) One form one student from a certain school was given a task by her teacher to write the chemical symbols of the following elements; sodium, iron and chlorine. But the student did as shown below in 6b ( i, ii, and iii). Help him by identifying his mistakes and then write a correct symbol in each

i. Symbol of sodium is (So)

ii. Symbol of iron is (Ir)

iii. Symbol of chlorine is (CL)

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 116

PRESIDENT’S OFFICE

REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

FORM TWO NEW NECTA FORMAT

FORM ONE EXAMINATION – SEPTEMBER 2022

032     CHEMISTRY

TIME: 2:30 HOURS

INSTRUCTIONS

  1. This paper consists of sections A and B with a total of TEN (10) questions
  2. Answer all questions in the space provided.
  3. All writing must be in black or blue ink except for diagrams which must be in pencil
  4. Cellular phones and any unauthorized materials are not allowed in the examination room
  5. Write your Examination Number on every page of your answer booklet(s)
  6. The following constants may be used

Zn= 65, X =32, O=16

 

SECTION A (15 Marks)

Answer all questions in this section

  1. For each of the items (i) - (x), choose the correct answer from among the given alternatives and write its letter beside the item number in the bracket provided.

 

  1. The substance that can burn your skin is best described as: -
  1. Corrosive 
  2. Explosive 
  3. Flammable
  4. Toxic
  5. Oxidant
  1. When burette is used in the laboratory its calibration starts from above because.
  1. It measures the volume of remained
  2. It measures the used volume
  3. It measures the volume added
  4. It measures the volume of base added
  1. When burning a fuel produces  blue color it means there is
  1. Adequate supply of oxygen with production of soot
  2. In adequate supply of oxygen with production of soot
  3. Adequate supply of oxygen with production of less heat
  4. Adequate supply of oxygen with production of more heat
  1. One of the following apparatus is used to measure fixed volume of liquid
  1. Burette
  2. Pipette
  3. Conical flask
  4. Measuring cylinder
  5. Volumetric flask
  1. What should be done if the results obtained from an experiment do not support the hypothesis?
  1.     The results should be left out
  2.     A new problem should be identified 
  3.     The experiment should be changed
  4.     Ideas for further testing to find a solution should be given
  5.      The hypothesis should be accepted
  1. Water exists in three forms, which are solid, liquid and vapour. Which among of the following are examples of liquid form of water
  1. Rain, snow and hail
  2. Dew, rain and ice
  3. Mist, steam and clouds
  4. Rain, hail, ice
  5. Rain, mist, and dew
  1.                     Emulsion is the mixture of liquids that do not completely mix with each other.

         Which of the following set represent emulsion?

  1. Butter, lotion, toothpaste and milk
  2. Milk, gel, foam, sponge
  3. Cream, gel, lotion and paint
  4. Sponge, milk, smoke, insecticides
  5. Smoke, milk, paint and body spray
  1.                   Domestic utensils made up of iron do rust as a result of the presence of
  1. Air and fire
  2. Water and oil
  3. Air and water 
  4. Air and oil
  5. Water and fire
  1. When Mr Mwendakwao took Glucose and dissolved in water to form a uniform mixture.
  1. water is solution, glucose is solvent and the product is solute
  2. water is solute, glucose is solvent and the product is solution
  3. water is solvent, glucose is solute and the product is solution
  4. water and glucose forms immiscible mixture 
  5. water and glucose form emulsion

 

  1. A simple proof that some chemical reactions take place in our bodies is that

A. We eat a balanced diet

B. Doctors tell us so in the hospitals

C. We occasionally fall sick

D. The food we eat or the drinks we take are quite different from the waste products from our bodies

E. There is no proof

 

2. Match the items in List A with the responses in List B by writing the letter of the correct response beside the item number in the answer sheet or booklet provided.

List A

List B

  1. When air is pumped into test tube contain lime water, lime water turns milky
  2. Condition for iron to rust
  3. Oxygen, Heat and Fuel
  4. Coating of Iron or steel with Zinc
  5. Flammable liquids like petrol, alcohol and kerosene

A. Water is used for extinguishing

B. Oxygen and water/moisture

C. Presence of Oxygen

D. Fire triangle

E. Presence of carbon dioxide

F. Rusting

G. Galvanization

H. Class B fire

I. Nitrogen

 

SECTION B (70 MARKS)

ANSWER ALL QUESTIONS

3. (a) Consider the diagram below;

(i) Give aim of the above process

(ii) Identify the process A to F

(iii) Give two importance of the above diagram to our daily life.

(b) State whether the following is permanent change or temporary change,

(i) Dissolution of salt in water

(ii)    Rotting of mangoes

 

4. (a) In which other areas do we find the warning signs out of laboratory (give four point)

(b) Explain how measurements of volume differ when using measuring cylinder and burette

(c) It is recommend that laboratory apparatus should be properly washed or wiped after use, explain the significance for this when

  1. Measuring volume of liquids
  2. Measuring mass of substance

5(a) Fill the blanks 

  1. The techniques used to separate serum from blood samples is called _________________________
  2. The insoluble substances remain in a filter paper during filtration are termed as ___________________________
  3. Boiling points of substance reflect the strength of __________________
  4. The sub atomic particles of an atom are ____________________ and _____________________
  5. Solar energy is example of _______________________resources

 

 

 (b) Suggest the best method of separating the following mixture

  1. Alcohol and water 
  2. Sodium chloride and water
  3. Green solution from leaves  
  4. Sand from rice 

 

  1. Iron fillings and powder calcium carbonate 

 

 

6. (a) Mrs. Janeth bought all necessary building materials as he wanted to build modern and expensive house for his mother, four months later he found out that almost all nails and Iron sheets have been rusted as she ignored leakage and small holes in the storage room, unfortunately he has no extra money to buy new nails and Iron sheets. As a chemistry student what will you advice Mrs. Janeth?

(b) Suppose you are in a bus traveling from Moshito Rombo for annual holiday, a bus driver went to the petrol station to fill fuel but he forgets to switch off the bus engine, this caused explosion and fire started. As a form four students:

(i) Will you be able to use fire extinguisher to fight against fire?

(ii) Which type of extinguisher will be suitable for you to use? Give reason of your choice 

 

7. (a) Assign each of the properties to either luminous or non-luminous flame by putting a tick (?) on the respective column in the following table.

Property of Flame

Luminous Flame

Non- luminous Flame

  1. Gives plenty of smoke and soot.

 

 

  1. Blue in colour and almost invisible.

 

 

  1. Yellow zone is larger than blue zone.

 

 

  1. Formed when the air holes are completely closed.

 

 

  1. Blue zone is larger than yellow zone.

 

 

  1. Produces the hottest flame.

 

 

(b) Assume that you are doing an experiment in the laboratory at 07.30 pm and suddenly the lights go off. Give two reasons to justify the fact that you would consider luminous flame rather than non-luminous flame as an alternative source for lighting.

(c) Identify two properties of the flame produced by the Bunsen burner (air holes full opened) that can not be found in the flame produced by the spirit burner.

8. (a)Giving a reason, state whether rust will form or not in each of the situations (i) - (vi).

  1. Iron bar is dipped into boiling water.
  2. Painted iron bar is dipped into un-boiled water.
  3. Iron bar is dipped in un-boiled water.
  4. Oiled iron bar is left outside the room over nights.
  5. Alluminium wire is dipped in un-boiled water.
  6. A dry iron bar is wrapped with cotton wool.


(b)Briefly explain any four methods of preventing rusting.

9. (a)Why is petrol not recommended to be used as fuel in school laboratories? Briefly explain.

(b) Which three heat sources can be used to boil some water in the laboratory instead of the Bunsen burner?

(c) Arrange the following steps for lighting the Bunsen burner in a correct sequence using letter

A  to F.

  1. Turn the collar to close the air hole completely.
  2. Turn on the gas fully to ensure that plenty of gas is entering the burner.
  3. Connect the Bunsen burner to the gas mains.
  4. Adjust the gas tap until the supply of gas is enough for a time.
  5. Light the gas at the top of the barrel with a lighted matchstick.
  6. Close the air hole.

SECTION C (15 MARKS)

10.(a) Identify the five accidents which are common in the laboratory and in each explain possible causes and preventive measures to be taken.

(b). Briefly explain the five classes of fires based on the nature of the burning material and the extinguisher required. Give one example for each class.

 (c) Differentiate metals from non metals

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 103

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

CHEMISTRY TERMINAL EXAMINATION

FORM ONE-2022

Time: 2:30Hours

Instructions.

  1. This paper consists of section A, and B with a total of 10 questions
  2. Answer all questions in spaces provided.
  3. Section A carries 20 marks, section B 80 marks.
  4. All answers should be written in the spaces provided.
  5. All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6. Write your number on every page of your answer booklet.
  7. The following atomic masses may be used: H=1, N=14, O=16, S=32

 SECTION A (20 Marks)

 Answer All questions in this section.

  1. For each of the items (i)-(x), choose the correct answer from the alternatives given.
  1. Chemistry helps us to explain 
  1. Why and how matter undergoes changes
  2. What medicine to use when are fall sick
  3. How chemicals are used in agriculture
  4. How pesticides help in crop population
  1. A simple proof that chemical reactions takes place in our bodies is that 
  1. We occasionally fall sick
  2. Doctors tell us in the hospital
  3. The food we eat or drinks we take are quite different from the waste products from our bodies
  4. We eat a balance diet.
  1. Which of the following is not a list of products of application of chemistry?
  1. Tables, chairs and bricks
  2. Shoes polish, antiseptics and toothpaste
  3. Soap, medicinal and perfume
  4. Fertilizer, pesticides and herbicides
  1. Chemistry is a scientific activity because
  1. Chemistry is studies in schools
  2. It’s an interesting subject
  3. Knowledge of chemistry is acquired through observation
  4. Knowledge of chemistry is acquired through experiment and logical reasoning
  1. A condition in which the lungs are unable to get enough oxygen is known as 
  1. Shock
  2. Fainting
  3. Suffocation
  4. Choking
  1. Choking can be treated by 
  1. Cardio pulmonary resuscitation
  2. Expose the victim to the air
  3. Perform Heimlich manoeuvie
  4. Put a victim in the recovery position
  1. If the poison is on the skin then 
  1. Do not apply any ointment
  2. Move the person to where there is a fresh air
  3. Give the victim fluids or juice
  4. Give on oral rehydration drinks
  1. A careless student secretly tied to mix up different chemicals just out of curiosity. The most thing that could happen to the student was to 
  1. Damage the school properly
  2. Be expelled from school
  3. Annoy the teacher
  4. Produced poisonous cases that could lead to death
  1. Which of the following is not true about First Aid?
  1. First aid avoids an already bad situation from worsening
  2. First and helps to reduce pain, brings hope and encouragement
  3. Every student should be trained on how to administer first aid
  4. It is given to an accidental victim before seeking the doctor’s advice
  1. What is the use of splints first aid?
  1. Used for cutting bandages or pieces of cloth
  2. Used for holding pieces of bandages or cloth together
  3. Used to support broken bones and is tied using bandages
  4. Used for picking up and holding things

2. Match the items in List A with their correspondence items in List B. 

LIST A

LIST B

  1. Separation of wanted or unwanted solid from mixture.
  2. Method of separating basing on the solubilities of solids in miscible solvents.
  3. A solid that is formed out of solution.
  4. Solid obtained after filtration
  5. Is the best method for separation of liquid mixtures.
  1. Emulsion paint
  2. Emulsion point
  3. Precipitates
  4. Precipitation
  5. Residue
  6. Filtrates
  7. Simple distillation
  8. Fractional distillation
  9. Evaporation
  10. Filtration
  11. Contaminated water
  12. Crystals
  13. Hand picking
  14. Chromatography
  15. Aluminium chloride
  16. Ammonium sulphate

 (b) Answer the given questions by writing the correct answer in the blank spaces provided.

(i) In which stage is the hypothesis tested during scientific investigation? . . . . . . . . . . . . . . . . .

(ii) On which factor does the physical state of a molecule depend?  . . . . . . . . . . . . . . . . . 

(iii) Which properties depend on the proportions of mixing substances in a mixture? . . . . . . . . . . . . . . . . . 

(iv) What are the building blocks of matter?  . . . . . . . . . . . . . . . . . 

SECTION B: 56 Marks

Answer all questions

3. Fill in the blank space 

  1. What is a flame? ________________________________________________________________________________________________________________________________________________________________________________________
  2. What is a heat? ________________________________________________________________________________________________________________________________________________________________________________________
  3. Name the type of the flame that is produced when the air hole of the Bunsen burner are half closed __________________________________________________________________
  4. What causes the striking back of a flame in the Bunsen burner.

Mention only three causes 

  1. __________________________________________________________________________
  2. __________________________________________________________________________
  3. __________________________________________________________________________
  1. Mention two ways which striking back is recovered
  1. _____________________________________________________________________________
  2. _____________________________________________________________________________

4. Study the figure below and answer the question that follows: 

  1. Name the type of the flame indicate by the figure below _______________________________________________________
  2. Name the parts labeled: A _________________________________ B _________________________ C________________________________________
  3. What would happen if the march stick was placed in the part labeled C ____________________________________________________________________________________________

5. (a) List down ten laboratory rules  

(b) With the help of diagram explain how each of the following lab apparatus works

(i) Condenser (ii) Burette   (iii) pipette (iv) deflagrating (v) thermometer   

(c) State two aims of the alchemists 

(i) _____________________________________________________________________________

(ii) _____________________________________________________________________________

  1. What is the use of the following in the lab?
  1. Dark room _______________________________________________________________________
  2. Large windows __________________________________________________________________
  3. Circuit breaker __________________________________________________________________

6. Explain how chemistry is applied in the following field? 

i)Communication ________________________________________________________________________________________________________________________________________________________________________________

ii)Transportation ________________________________________________________________________________________________________________________________________________________________________________

b)List down three common accidents that to occur in the chemistry lab and their possible causes 

  1. ________________________________________________________________________________________________________________________________________________________________________________
  2. ________________________________________________________________________________________________________________________________________________________________________________
  3. ________________________________________________________________________________________________________________________________________________________________________________

c)Explain how you would administered first aid to a person having an electric shock at least four steps ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

7. With the help of a well labeled diagram of the Bunsen burner describe how the Bunsen burner work (the process involving lighting of the Bunsen burner) 

8. With the help of a well labeled diagrams differentiate between the luminous flame and non luminous flame 

9. With the aid of the diagram explain any four chemical signs that are found in the chemistry lab. Suggest their precaution measures. 

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 91

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

CHEMISTRY MID TERM EXAMINATION

FORM ONE- MARCH/APRIL-2022

Time: 2:30Hours

Instructions.

  1.  This paper consists of section A, and B with a total of 10 questions
  2. Answer all questions in spaces provided.
  3. Section A carries 20 marks, section B 80 marks.
  4. All answers should be written in the spaces provided.
  5. All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6. Write your number on every page of your answer booklet.

 SECTION A (20 Marks)

 Answer All questions in this section.

 

  1.   The term chemistry means;
  1. Study of nonliving things
  2. Study of physical properties of matter
  3.  Study of drugs
  4. Study of composition and decomposition of matter
  1.    Substances studied in chemistry are made up of;
  1. Compounds
  2. Matter
  3.  Chemicals
  4. Element
  1. Which is not an importance of studying chemistry;
  1. Understand how matter undergo chemical change
  2. Make various medical products
  3. Understand the use of chemicals in agriculture
  4. Help us enter into various careers.
  1. A mother at home can apply chemistry to;
  1.    Weed flowers in the garden
  2.    Dusting the floor of her house
  3.    Weighing maize flour
  4.   Cooking food in the kitchen
  1.  Which of the following illustrates a chemical reaction taking place in our body
  1. Falling sick
  2. Digestion
  3. Respiration
  4. Salivating
  1.         Which of the following is not a list of application of chemistry?
  1. Table, chairs and Bricks
  2. Shoe polish, antiseptics and toothpaste
  3. Soap, medicinal drugs and perfumes
  4. Fertilizer, pesticides and herbicides
  1. Which of the following careers does not require the knowledge of chemistry?
  1. Medicine
  2. Agriculture
  3.  Archeology
  4. Pharmacy
  1.    Identify the skill not acquired during chemistry study
  1. Careful observation
  2. Accurate reporting
  3.  Testing hypothesis experimentally
  4. Map reading skills
  1.   Individuals who studied chemistry long time ago were called
  1. Alchemists
  2. AL chemistry
  3.  Witch doctors
  4. Chemists
  1.  Chemistry is list related to;
  1. Biology
  2. History
  3.  Physics
  4. Geography

 

  1. MATCHING ITEMS QUESTIONS.

LIST A

LIST B

  1. Wanted to convert metals into precious metals
  2. Deals with making and dispensing of drugs
  3. Breaking up of matter
  4. A chemical applied in plants to supply nutrients
  5. Deals with development of new products.
  1. Engineering
  2. Technology
  3. Alchemist
  4. Fertilizer
  5. Eyes
  6. Tongue
  7. Composition
  8. Decomposition
  9. Chemist
  10. Pharmacy
  11. Nursing
  12. Medicine
  13. Matter
  14. Atom
  15. Chemical engineer
  16. Science
  17. physics

 

  1.                 Write T for true statement and F for a False statement.
  1.                   There are only two branches of science
  2.                 Chemistry has little application in our life
  3.              Through chemistry, development of modern technology is made possible
  4.               We only study chemistry to enter into careers
  5.                 Chemistry is only studied by chemists

b) Fill in the spaces below;

        i) The field of science that deals with crop production and livestock management is  called……………

       ii) Ink, shoe polish, paper, clothes and rubber are examples of things produced from  application of knowledge of…………………………………………………….

      iii) Study of chemistry prepares people for different skills needed in our daily life such  as………….

      iv) Chemicals used to kill insects are called………………………………………………………..

      v)  The study of matter and its properties is called…………………………………

  1.                 A) mention three branches of science

b) Who is a chemist?

c) List 5 places where chemistry is applied

d) Name three cleaning agents made by chemistry knowledge

 

  1.                 Explain how chemistry is applied in the following;
  1.                   Health
  2.                 Agriculture
  3.              Energy production
  4.               Transport
  5.                 Modern technology
  1.                 Mention four importance of studying chemistry
  2.                 Mention two items used in each of the following categories that are made through application of chemistry
  1.                   Agriculture
  2.                 Pharmaceutical
  3.              Household items
  4.               Food and beverages
  5.                 Transport

b) Chemistry has contributed to environmental hazards. Briefly explain how

 

  1.    a) Who are alchemists?

b) What was the aim of alchemists?

c) Briefly explain how chemistry has contributed to good life

 

  1.  a) Mention areas where chemistry is applied.

    b) Mention five careers one can enter by studying chemistry.

 

  1.    a) mention two branches of chemistry

      b) Differentiate chemistry from physics.

 

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 79

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

CHEMISTRY ANNUAL  EXAMINATION

FORM ONE-2021

 

Time: 2:30Hours

Instructions.

  1.              This paper consists of section A, and B with a total of 10 questions
  2.              Answer all questions in spaces provided.
  3.              Section A carries 20 marks, section B 80 marks.
  4.              All answers should be written in the spaces provided.
  5.              All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6.              Write your number on every page of your answer booklet.
  7.              The following atomic masses may be used: H=1, N=14, O=16, S=32

 SECTION A (20 Marks)

 Answer All questions in this section.

  1. For each of the items (i)-(x), choose the correct answer from the alternatives given.

SECTION A – (20 MARKS)

1. For each of the item (i)-(x) choose the correct answer from the choices given and write the corresponding letter in the table provided.

  1. Air entering the Bunsen burner is controlled by ___________(A) metal ring (B) air hole (C) metal jet (D) air ring
  2. Which of the following apparatus is used to measure a fixed volume of liquid? (a) burette (b) measuring cylinder (c) pipette(d) dropper
  3. A branch of science which deals with the study of matter and its properties is called ________ (a) meteology (b) astronomy (c) physics (d) chemistry
  4. Petrol is an example of _________ (a) corrosive substance (b) irritant substance (c) flammable substance (d) toxic substance
  5. First aid is provided to: (a) any person who is sick (b) an accident victim (c) an ill person (d) doctors and nurses
  6. A chemist should acquire the following skills except (a) experimentation (b) observation (c) problem identification (d) surgery
  7. One of the following is not laboratory rules. (a) heat flammable chemicals over open flame (b) turn off all burners when not in use (c) always wears protectors during experiment (d) never use broken glassware during experiment
  8. The chemical symbol lead is _________ (a)Nw (b) Pb (c) Ar (d) Sd
  9. Chemical spread on crops to destroy pests are called __________ (a) insecticide (b) pesticides (c) fertilizers (d) weed killers
  10. A pharmacist is a person who deals with ____________ a) chemical processing industries (b) medicine (c) laboratory experiment (d) agriculture

I

ii

Iii

Iv

v

vi

vii

viii

ix

x

 

 

 

 

 

 

 

 

 

 

 

2. a) Match each item in list A with the correct response in list B by writing its letter below the number of the corresponding item in the table provided

LIST A

LIST B

  1. Direct change of solid state to gaseous state
  2. The third step in scientific procedure.
  3. The flame which is suitable for laboratory uses
  4. Use to protect animals and human being from diseases
  5. Is a special room where scientific experiments areconducted

 

A. hospital

B.  Vaccines

C. Luminous flame

D. deposition

E. sublimation

F. non luminous flame

G. experimentation

H. formulation hypothesis

I. laboratory

 

 

List A

I

Ii

iii

iv

v

List B

 

 

 

 

 

 

b) fill the blanks provided

  1. Chemical used to kill insects are called ______________
  2. Are the people who study chemistry in ancient times ____________
  3. __________ is the study of nature
  4. The study of chemistry prepares people for different skills we need in our daily life such as _____________
  5. ____________ is anything which has mass and occupies a space

 

SECTION B (80 MARKS)

3 (a) Define chemistry __________________________________________________________________________________________________________________________

 (b) Name two product in each of the following field made by application of chemistry

Field 

products

i) agriculture

a)

 

b)

ii) food and beverage industry

a)

 

b)

 

 

 

c) mention four importance of studying chemistry

  1. ___________________________________________________________________________________
  2. __________________________________________________________________________________
  3. _________________________________________________________________________________
  4. _____________________________________________________________________________________

4. a) Define the following terms

  1. First aid _____________________________________________________________________________________________________
  2. First aid kit ___________________________________________________________________________________________________________________________________________________
  3. Fainting ____________________________________________________________________________________________________________________________________________

(b) Mention four importance of first aid to a victim

  1. _________________________________________________________
  2. _________________________________________________________
  3. ____________________________________________________________
  4. ________________________________________________________________

5. a) Draw and give one function of each of the following apparatus 

Name of apparatus

Drawing 

functions

i) conical flask

 

 

ii) pipette

 

 

 

b) mention four components of first kit and state their uses

  1. ________________________________________________________________________________
  2. ________________________________________________________________________________
  3. __________________________________________________________________________________
  4. ________________________________________________________________________

6. a) Mention three (3) state of matter and give three (3) examples of each state

  1. ________________________________________________________
  2. _______________________________________________________
  3. __________________________________________________________

b) what type of change are these

  1. Decaying of teeth _______________________________________________________
  2. Burning of charcoal _____________________________________________________
  3. Drying of wet clothes ____________________________________________________-
  4. Grinding piece of chalks ______________________________________________
  5. Ripens of fruits _______________________________________________________
  6. Sour milk ____________________________________________________________________

 

7. a) what is the differences between physical change and chemical change (4 points)

 

PHYSICAL CHANGE 

CHEMICAL CHANGE

 

 

 

 

 

 

 

 

 

 

 

        b) The figure below shows the relationship among three states of matters: Name the process involved in A, B, C, D, E and F

  1. Is____________________________________________
  2. Is_________________________________________________
  3. Is __________________________________________________
  4. Is_____________________________________________________
  5. Is_________________________________________________________
  6. Is __________________________________________________________-

8. a) i) what is flame? _______________________________________

        ii) mention two types of flame produced by Bunsen burner

  1. ____________________________________________________________-
  2. ___________________________________________________________

      b) Give four differences between the flames you have mentioned in 8 a (i) above

i)

 

ii)

 

iii)

 

iv)

 

 

9. What do you understand about the following terms

  1. Mixture____________________________________________________________________________________________________________________
  2. Solute _________________________________________________________________________________
  3. Solvent _____________________________________________________________________________________________________________________________
  4. Solution _____________________________________________________________________________
  5. Compound _____________________________________________________________________________________________________

10. i) Define an element______________________________________________________________________________________________________-

  ii) write a chemical symbol for each of the following elements

  1. Iron _________________________________________________________________
  2. Copper __________________________________________________
  3. Silver _______________________________________________________
  4. Mercury _______________________________________________________

iii) write the name of the following element for each chemical symbols 

  1. K_________________________-
  2. Ne__________________________
  3. Ca_______________________
  4. Pb __________________________-

 

 

 

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 72

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

CHEMISTRY MID TERM EXAMINATION

FORM ONE- AUG/SEPT 2021

Time: 2:30Hours

Instructions.

  1.              This paper consists of section A, and B with a total of 10 questions
  2.              Answer all questions in spaces provided.
  3.              Section A carries 20 marks, section B 80 marks.
  4.              All answers should be written in the spaces provided.
  5.              All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6.              Write your number on every page of your answer booklet.

 SECTION A (20 Marks)

 Answer All questions in this section.

  1. For each of the items (i)-(x), choose the correct answer from the alternatives given.

      (i) Air entering the Bunsen burner barrel can be controlled by

  1.   metal ring 
  2.   air hole
  3.   metal jet 
  4.  air ring

(ii)  The appropriate extinguisher used to put off fire caused by cooking oil is:

  1.     Water extinguisher
  2.     Carbon extinguisher
  3.      Wet chemical extinguisher
  4.     Dry air extinguisher

(iii)  A non-luminous flame is obtained if the hole is:

  1. fully opened 
  2. partially opened 
  3.  closed 
  4.  half opened

(iv) Which of the following components can be separated by filtration method?

  1.     Sand and water 
  2.     Kerosene and water
  3.     Ethanol and water 
  4.     NaCl and water

(v) All domestic utensils made of iron undergo rusting when exposed to

  1.        Air and fire
  2.         Air and oil
  3.         Air and water
  4.        Water and oil

(vi) A change from gaseous state to solid state without passing through a liquid state is called:

  1.        Deposition 
  2.         Sublimation
  3.         Condensation 
  4.        Solidification

(vii) When a burning fuel produces blue colour it means there is:

     A.   adequate supply of oxygen with production of soot

     B.   inadequate supply of oxygen with production of more heat.

     C.   inadequate supply of oxygen with production of soot.

     D.    adequate supply of oxygen with production of more heat.

(viii) Why is water a universal solvent?

  1.     It is neither acidic nor basic than any other known liquid.
  2.     It dissolves more substances than any other known liquid.
  3.     It occurs naturally in all the three states of matter than any other liquid.
  4.     It dissolves both organic and inorganic solutes than any other liquid.

(ix) Which of the following gives the correct meaning of air?

  1.        Mixture of Nitrogen, Oxygen and dust particles.
  2.         Mixture of Nitrogen, Oxygen and Carbon dioxide.
  3.          Mixture of Nitrogen, Oxygen and Water vapour
  4.        Homogenous mixture of gases.

(x) Which of the following is the best apparatus for measuring accurately the volume of a given solution?

  1.     Measuring cylinder
  2.     Burette
  3.     Beaker
  4.     Conical flask

2. (a)Match each item in List A with a correct response in List B by writing the letter of the correct response below the corresponding item number in the table provided.

LIST A

LIST B

  1. Miscible liquid
  2. Gas used in balloons
  3. A liquid metallic element
  4. Burning back
  5. Used in combustion
  1.              Water and kerosine
  2.               Water and alcohol
  3.               Excess gas
  4.              Flame rise in burrel
  5.               Nitrogen
  6.                Neon
  7.              Argon
  8.              Oxygen
  9.                 Helium
  10.                 Mercury
  11.              Bromine.

(b) Answer the given questions by writing the correct answer in the blank spaces provided.

  1. The smallest particle of matter……………….
  2. Used to prepare a solution with known concentration…………..
  3. Preventing rusting by covering with zinc………………………
  4. The most abundance gas in air…………………..
  5. Turns lime water milky………………


SECTION B (80 Marks)

Answer all questions in this section.

3.         (a) Mariam was preparing food for her family using hot oil in a frying pan. Accidentally the pan tripped over and a huge fire spread over her kitchen floor.

(i)Mention two extinguishers which would be appropriate for putting out the fire.

(ii)Which fire extinguisher would be dangerous to use when trying to put out the fire in (a) above? Give reason. (b) Mention three conditions for a fire to start.

(c) (i) What is combustion?

(ii) Give three areas where combustion is applied.

4. (a) List down four careers that are a result of studying Chemistry. 

 The following are possible causes of accidents which can occur in the Chemistry laboratory. State how you can avoid them.

(i)Poisonous chemicals left in an unlocked cupboard .........

(ii)A student picking up a bottle containing concentrated H2S04 acid by the neck .........

(iii)Concentrated acids stored in the upper most shelf of cupboard

5.(a) Differentiate between:

(i)an atom and an element

(ii)Combustion and rusting

(iii)a solute and a solvent

(iv)a compound and a mixture

(b)Give two applications of chemistry in everyday life

(c)Why most laboratory apparati are made of glass?


6. Identify the five accidents which are common in the laboratory and in each explain possible causes and preventive measures to be taken.

7. (a) Why candles are not suitable for heating in the laboratory? Give two reasons.


(b) Differentiate luminous from non-luminous flame by giving five points.

8. (a) State one use of each of the items (i) – (x) in administering First Aid.

S/N

Item

Use

(i)      

Soap


(ii)   

Bandage


(iii)  

Sterile gauze


(iv)  

Iodine tincture


(v)    

Petroleum jelly


 (b) Effective use of the four senses of observation is important before a chemist can make conclusion. With four points, show how the senses are used as tools of observation during experimentation by giving one example for each.

(i)     ………… ………… ……………

(ii)  ………… …………… ………….

(iii) ………… ……………… …… ….

(iv) ………… …………… ……………

9. Briefly explain the five classes of fires based on the nature of the burning material and the extinguisher required. Give one example for each class.

10. Define the following terms:

(i) Brownian motion

(ii) Compound

(b) Identify whether the following is a physical or chemical change: 

(i) Cutting aluminium foil into pieces 

(ii) Lighting a match .

(c) How can you separate the following mixtures? Briefly explain.

(i)Water and kerosene

(ii)Salt and water

(iii)Ethanol and water

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 64

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

CHEMISTRYTERMINAL EXAMINATION

FORM ONE-2021

Time: 2:30Hours

Instructions.

  1.              This paper consists of section A, and B with a total of 10 questions
  2.              Answer all questions in spaces provided.
  3.              Section A carries 20 marks, section B 80 marks.
  4.              All answers should be written in the spaces provided.
  5.              All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6.              Write your number on every page of your answer booklet.
  7.              The following atomic masses may be used: H=1, N=14, O=16, S=32

 SECTION A (20 Marks)

 Answer All questions in this section.

  1. For each of the items (i)-(x), choose the correct answer from the alternatives given.
  1. The following skills acquired through studying chemistry except;
  1. Careful observation
  2. Accurate reporting
  3. Testing hypothesis experimentally
  4. Map reading skills
  1. Chemistry is a scientific activity because;
  1. Chemistry is studied in schools
  2. Chemistry is interesting subject studied through data collection and analysis.
  3. Knowledge of chemistry is acquired through observation, experimentation and logical reasoning.
  4. It involves study of living and non living things.
  1.  The following are laboratory rules except;
  1. Turn off water and gas tap after use
  2. Test any unlabelled substance before using it in the laboratory.
  3. Put off flames which are not in use
  4. Remove obstacles from gang ways.
  1. Splints are among of the first aid kit equipments which of the following sentences set describes its use;
  1. Used to pick up and holding things
  2. Used for cutting bandages or pieces of clothes
  3. Used to support broken bones and is tied using bandages.
  4. Used for holding pieces of bandages or cloth together.
  1.     The Bunsen burner is likely to contain soot when;
  1. The air hole is closed
  2. The air hole is open but not fully
  3. The air holes of Bunsen burner are completely open.
  4. The burner is not raised
  5. The gas supply is high
  1.  Which of the following takes place in experimental stage?
  1. Rejection of hypothesis
  2. Acceptance of hypothesis
  3. Concluding the scientific findings
  4. Carry out investigations
  1. In scientific procedure, what would be the next step to follow after experiments?
  1. Data interpretation
  2. Conclusion
  3. Observation
  4. Investigation
  1. In her first experiment, Mwajuma dissolved sulphuric acid in water and heat was evolved. In her second experiment he dissolved sugar in water and no heat was evolved or absorbed she conducted that;
  1. Her first experiment was physical change
  2. Both of her experiments were physical change
  3. Her second experiment was chemical change
  4. Her first experiment was chemical change
  1. In most general sense the word combustion means …………….
  1. Burning substance in oxygen or air.
  2. Burning compound of carbon in air.
  3. Burning any fuel in air or oxygen
  4. By chemical combination accompanied by light and heat in which or more reactants is gaseous
  1. 10 grams of copper powder were placed initiation tube containing air. The tube was very strongly for half an hour. At the end experiment;
  1. Copper increased in mass in changed colour
  2. Copper melted into liquid copper form.
  3. The total mass of tube and its content decreased.
  4. Water vapour appeared in the tube.

2. (a) Match the items in List A with their correspondence items in List B. 

LIST A

LIST B

  1. Separation of wanted or unwanted solid from mixture.
  2. Method of separating basing on the solubilities of solids in miscible solvents.
  3. A solid that is formed out of solution.
  4. Used to separate dyes
  5. Is the best method for separation of liquid mixtures.
  1. Emulsion paint
  2. Emulsion point
  3. Residue
  4. Filtrates
  5. Simple distillation
  6. Fractional distillation
  7. Evaporation
  8. Filtration
  9. Contaminated water
  10. Crystals
  11. Hand picking
  12. Chromatography

(b) Fill the following gaps with the correct answer

  1. Mixture of solute and solvent…………………………………………
  2. A box for keeping items to be used for first Aid…………………………….
  3. Solid obtained after filtration……………………………………..
  4. An apparatus used to measure fixed volume of a liquid………………..
  5. The smallest particle of matter…………………………………..
  1. (a) Define the following terms;
  1. Combustion ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….
  2. Combustible material ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….

(b) Label the parts marked A, B, C, D, E and F in the diagram below; 

image

  1. ………………………………………..
  2. ………………………………………..
  3. ……………………………………….
  4. ………………………………………..
  5. ………………………………………..
  6. ………………………………………..

(c) What is the importance of parts labelled? 

    B ………………………………………………………………………………………

    C ………………………………………………………………………………………

    D ……………………………………………………………………………………….

  1. Fill the suitable word in the space provided;
  1. Bronze is an alloy formed by mixing ……………… and ……………………….
  2. Steel is an alloy formed by mixing ………………… and ……………………….
  3. …………………… is a solution in which like solvent used is not water.
  4. …………………….. is used to stir and mix substance uniformly.
  1. (a) Define the following terms and give one example in each case;
  1. A chemical symbol ……………………………………………………………………………………………………………………………………………………………………………………
  2. An element ……………………………………………………………………………………………………………………………………………………………………………………
  3. A compound ……………………………………………………………………………………………………………………………………………………………………………………
  4. Suspension ……………………………………………………………………………………………………………………………………………………………………………………

(b) Write names of elements represented by the following symbols

     i.  Au ……………………………………

    ii. Ag …………………………………….

    iii. Hg ……………………………………..

    iv. P ………………………………………..

    v. Sn …………………………………………

  1. Draw apparatus which are used to perform the following process in the laboratory;

Process 

Apparatus diagram 

  1. It is used to measure accurate 20/25cm3 of liquid.

(b)A flat apparatus at the base used to hold volume of liquid during experiment. 

© Wire placed on top of tripod stand. 

(d)Used for scooping small quantities of powder or crystalline chemicals. 

(e)Used for holding heating and mixing liquid – it measures estimate volume of liquids. 

  1. (a) Mention and explain briefly any five warning signs found in chemical containers

     giving one example in each case. 

  1.                   ………………………………………………………………………………………………………………………………………………………………………………
  2.                 ………………………………………………………………………………………………………………………………………………………………………………
  3.              ………………………………………………………………………………………………………………………………………………………………………………
  4.               ………………………………………………………………………………………………………………………………………………………………………………
  5.                 ………………………………………………………………………………………………………………………………………………………………………………

(b) Distinguish between the following; 

 i.   Hypothesis against fact ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………     

ii. Deposition against sublimation ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 (c) Point out any 6 differences between metals and non – metals ; 

Metals 

Non metals 

  1. (a) Briefly explain any five methods of preventing rusting.
    1. ………………………………………………………………………………………………………………………………………………………………………………
    2. ………………………………………………………………………………………………………………………………………………………………………………
    3. ………………………………………………………………………………………………………………………………………………………………………………
    4. ………………………………………………………………………………………………………………………………………………………………………………
    5. ………………………………………………………………………………………………………………………………………………………………………………

(b) A certain pink coloured compound is heated to form blue colour. When water is 
      added to sample , it changed back to pink. 

      i. What change is demonstrated by the compound …………………………………....

      ii. Explain the reasons for your choice. 

…………………………………………………………………………………………………………………………………………………………………………………………...….

(c) State the type of changes demonstrated by the following phenomenon; 

  1. Burning of firewood ……………………………………………………….
  2. Rotting of meat …………………………………………………………….
  3. Heating frying pan …………………………………………………………..
  4. Melting of butterfat …………………………………………………………
  5. Change of cloud to rain ……………………………………………………..
  6. Heating of iron rod …………………………………………………………..
  1. Your provided with the diagrams below, study it carefully and answer questions that follows;

iron-nails-1

  1. State short and clear description about what will be observed in each test tube A – D after 2 or 3 days;
  1. Test tube A. ………………………………………………….
  2. Test tube B …………………………………………………..
  3. Test tube C. …………………………………………………..
  4. Test tube D. …………………………………………………..
  1. Why the water in the test tube D boiled the covered with oil. ……………………………………………………………………………………………………………………………………………………………………………………
  2. What is the function of calcium chloride in test tube B? …………………………………………………………………………………………………………………………………………………………………………………….
  3. What conclusion can you draw from your experiment? …………………………………………………………………………………………
  4. (i) Give two similarities between combustion and rusting …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(ii) Give two differences between combustion and rusting …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 55

Student’s Examination No..............................................

THE PRESIDENT’S OFFICE MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES

CHEMISTRY MID TERM EXAMINATION-MARCH

FORM ONE-2021

Time: 2:30 Hours

Instructions.

  1. This paper consists of section A, and B with a total of 10 questions
  2. Answer all questions in spaces provided.
  3. Section A carries 20 marks, section B 80 marks.
  4. All answers should be written in the spaces provided.
  5. All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6. Write your number on every page of your answer booklet.
  7. The following atomic masses may be used: H=1, N=14, O=16, S=32

SECTION A (20 Marks)

Answer All questions in this section.

1. For each of the items (i)-(x), choose the correct answer from the alternatives given

  1. Kipp’s apparatus is used in the laboratory for;
  1. Drying gases
  2. Obtaining continuous supply of gases
  3. Obtaining pure gases
  4. Separation of gases
  1. Chemical which can easily catch fire are best termed as;
  1. Flammable 
  2. toxic 
  3. explosive 
  4. corrosive
  1. A pipette is used for;
  1. Measuring distance of length
  2. Measuring specific volume of liquid
  3. Measuring volume
  4. Heating liquid
  1. Which of the following sets of apparatus are suitable for measuring volume of solution or liquids?
  1. Burette, pipette and beaker
  2. Burette, pipette and conical flask
  3. Measuring cylinder, pipette and burette
  4. Burette, flat bottomed flask and pipette
  1. The substance that can burn your skin is best describe as;
  1. Flammable
  2. corrosive 
  3. explosive 
  4. toxic
  1. Which of the following warning signs is likely to be found on a bottle containing petrol;
  1. Oxidant
  2. flammable
  3. corrosive 
  4. irritant
  1. Which of the following chemical warning signs is likely to be found on a bottle containing potassium permanganate(vii);
  1. Oxidant
  2. corrosive
  3. explosive 
  4. toxic
  1. Which of the following warning signs is likely to appear on the bottle containing concentrated Nitric Acid in the laboratory;
  1. Corrosive 
  2. explosive 
  3. flammable
  4. irritan
  1. Consider the diagram below of a certain apparatus in the laboratory;

Which is the correct reading of the above measurement?

  1. 10.50cm³ 
  2. 10.5cm³ 
  3. 10.60cm³ 
  4. 10.6cm³
  1. A student who get burns accidently in the chemistry laboratory would be given one of the following as a first Aid;
  1. Potassium permanganate 
  2. Nitric acid 
  3. petroleum jelly
  4. antibiotic solution

i

ii

iii

iv

v

vi

vii

viii

ix

x











2. You are provided with two list A and List B. choose a word(s) from list B which matches the statement or phrase in list A and write down its letter;

LIST A

LIST B

  1. Desicator
  2. Dropper
  3. White tiles
  4. Fume chamber
  5. Experimental room
  1. Where experiment is conducted
  2. Prepare poisonous gas (experiment)
  3. Simply the observation of colour change
  4. Add liquid in drop by drop
  5. To keep the substance constant dry

List A

i

ii

iii

iv

v

List B






SECTION B

3. (a) Define the following terms;

  1. First Aid

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . 

  1. First Aid Kit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  1. Laboratory apparatus

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b) Why beaker is used to estimate the volume of liquid and not to measure exactly volume of

liquid?

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  1. (a) Give two reasons why most of laboratory apparatus are made up with the glass materials
  1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b) Why laboratory should have larger window?

.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

  1. List down three causes of accidents in the scene;
  1. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  1. Suggest how each danger would be removed;
  1. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  1. Explain the First Aid procedures for the person with severe bleeding;
  1. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  4. ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
  5. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  6. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  1. (a) Laboratory apparatus are written the word “PYREX” What does mean by the above term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

b)Draw well diagram and state one function of the following apparatus.

  1. Pipette
  1. Burette
  1. Deflagrating spoon
  1. Beaker
  1. Measuring cylinder
  1. (a) Define the term “chemical warning sign”

.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b)Draw the chemical warning sign of the following substance;

  1. Methylated spirit;
  1. Insecticide
  1. Ammonia gas
  1. Concentrated sulphuric acid
  1. Potassium nitrate
  1. Write what might happen if you never followed instruction;
  1. Always wash your hands with soap before you leave a laboratory;.

.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  1. Always replace the cover (stopper) after using chemical

.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  1. (a) The following list contains the name of pieces of apparatus with the letter in each name JUMBLED UP. Rearrange the letters to produce the name of pieces of apparatus;
  1. LUPSTAA.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. TPTIPEE .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. GOTHUR.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  4. ROMTMREEHET .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  5. TERSTBEU.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  6. KSAFL.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  7. REBAKE .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b) Name two apparatus which can be used as container from above list;

  1. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

(c)Name one apparatus which can be used to measure volume from 9 (a) above

.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  1. (a) Mention three laboratory rules after experiment;
  1. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b) List down three (3) item found in first Aid Kit for providing First Aid

  1. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(c)Mention four (4) importance of providing First Aid to the victim

  1. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  4. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

THE END

BEST WISHES

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 47

THE PRESIDENT’S OFFICE MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES

CHEMISTRY MID TERM EXAMINATION-MARCH

FORM ONE-2021

Time: 2:30Hours

Instructions.

  1. This paper consists of section A, and B with a total of 10 questions
  2. Answer all questions in spaces provided.
  3. Section A carries 20 marks, section B 80 marks.
  4. All answers should be written in the spaces provided.
  5. All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6. Write your number on every page of your answer booklet.
  7. The following atomic masses may be used: H=1, N=14, O=16, S=32

SECTION A (20 Marks)

Answer All questions in this section.

1. For each of the items (i)-(x), choose the correct answer from the alternatives given.

  1. Chemistry is one of the sciences which deals with
  1. Alkalinity and basicity of substance
  2. The study of body cells
  3. Composition, properties and behavior of matter
  4. Chemical changes
  1. In chemistry experiments test
  1. Data
  2. Problem
  3. Hypotheses
  4. Observation
  1. When a chemist studies a substance, he/ she is interested in its
  1. Force of attraction
  2. Shape
  3. Smell
  4. Properties
  1. A chemist should acquire all of the following skills except
  1. Experimentation
  2. Observation
  3. Problem identification
  4. Surgery
  1. A chemistry defined as
  1. The scientific study of matter, compound, and chemical reaction
  2. The scientific study of compounds, mixture and organic substances
  3. The scientific study of composition structure and properties of matter
  4. The study of relation between human being, medicine, and pollution
  1. A mother at home can apply chemistry to;
  1. Weed flowers in the garden
  2. Dusting the floor of her house
  3. Weighing maize flour
  4. Cooking food in the kitchen
  1. Which of the following illustrates a chemical reaction taking place in our body
  1. Falling sick
  2. Digestion
  3. Respiration
  4. Salivating
  1. Which of the following is not a list of application of chemistry?
  1. Table, chairs and Bricks
  2. Shoe polish, antiseptics and toothpaste
  3. Soap, medicinal drugs and perfumes
  4. Fertilizer, pesticides and herbicides
  1. Which of the following careers does not require the knowledge of chemistry?
  1. Medicine
  2. Agriculture
  3. Archeology
  4. Pharmacy
  1. Identify the skill not acquired during chemistry study
  1. Careful observation
  2. Accurate reporting
  3. Testing hypothesis experimentally
  4. Map reading skills
  1. Individuals who studied chemistry long time ago were called
  1. Alchemists
  2. AL chemistry
  3. Witch doctors
  4. Chemists

2. You are given LIST A and LIST B. Choose the best response from LIST B that matches with description from LIST A.

LIST A

LIST B

  1. Study of matter
  2. Wanted to convert metals into precious metals
  3. Sense not commonly used in laboratory
  4. Deals with making and dispensing of drugs
  5. Deals with study of living and non -living things
  1. Engineering
  2. Technology
  3. Alchemist
  4. Fertilizer
  5. Eyes
  6. Tongue
  7. Composition
  8. Decomposition
  9. Chemist
  10. Pharmacy
  11. Nursing
  12. Medicine
  13. Matter
  14. Atom
  15. Chemical engineer
  16. Science
  17. physics

(b) Answer the following questions by writing the correct answer on the blank spaces provided.

i) The field of science that deals with crop production and livestock management is called . . . . . . . . . . . . . . . . . . . . . . . . . . .

ii) Ink, shoe polish, paper, clothes and rubber are examples of things produced from application of knowledge of . . . . . . . . . . . . . . . . . . . . . . . . . . . 

iii) Study of chemistry prepares people for different skills needed in our daily life such as . . . . . . . . . . . . . . . . . . . . . . . . . . . 

iv) Chemicals used to kill insects are called . . . . . . . . . . . . . . . . . . . . . . . . . . . 

v) The study of matter and its properties is called . . . . . . . . . . . . . . . . . . . . . . . . . . . 

SECTION B (80 Marks)

Answer all questions in this section.

3. Mention two items used in each of the following categories that are made through application of chemistry

  1. Agriculture
  2. Pharmaceutical
  3. Household items
  4. Food and beverages
  5. Transport

b) Chemistry has contributed to environmental hazards. Briefly explain how

4. (a) Mention and explain briefly any five warning signs found in chemical containers

giving one example in each case.

  1.  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  4. . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  5. . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b) Distinguish between the following;

i. Hypothesis against fact . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

ii. Deposition against sublimation . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

5.(a) List down ten laboratory rules

(b) With the help of diagram explain how each of the following lab apparatus works

(i) Condenser (ii) Burette (iii) pipette (iv) deflagrating (v) thermometer

(c) State two aims of the alchemists

(i) _____________________________________________________________________________

(ii) _____________________________________________________________________________

6.Define the following terms;

  1. Laboratory . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 
  2. First aid . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 
  3. First aid kit . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 
  4. Matter . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

7.Explain the causes of the following accidents in the laboratory;

  1. Shock
  2. Bleeding
  3. Skin burn

8.Mention five items found in first aid kit and their functions

9.(a) What do you understand by the term laboratory? . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

(b) Mention three characteristics of a good laboratory

(i) . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

(ii) . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

(iii) . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

(c) Why is it necessary to put on the following during the conduction of experiments

  1. Laboratory coat . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 
  2. Plastic goggles . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . 

10.Name six injuries which can be caused by running in the laboratories or in the corridor of it.

  1. . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  2. . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  3. . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  4. . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  5. . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .
  6. . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . .

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 44

THE PRESIDENT’S OFFICE MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES

CHEMISTRY MID TERM EXAMINATION

FORM ONE-2021

Time: 2:30 Hours

Instructions.

  1. This paper consists of section A, and B with a total of 10 questions
  2. Answer all questions in spaces provided.
  3. Section A carries 20 marks, section B 80 marks.
  4. All answers should be written in the spaces provided.
  5. All communication devices, calculators and any unauthorized material are not allowed in examination room.
  6. Write your number on every page of your answer booklet.
  7. The following atomic masses may be used: H=1, N=14, O=16, S=32

SECTION A (20 Marks)

Answer All questions in this section.

1. For each of the items (i)-(x), choose the correct answer from the alternatives given.

  1. Chemistry is one of the sciences which deals with
  1. Alkalinity and basicity of substance
  2. The study of body cells
  3. Composition, properties and behavior of matter
  4. Chemical changes
  1. In chemistry experiments test
  1. Data
  2. Problem
  3. Hypotheses
  4. Observation
  1. When a chemist studies a substance, he/ she is interested in its
  1. Force of attraction
  2. Shape
  3. Smell
  4. Properties
  1. A chemist should acquire all of the following skills except
  1. Experimentation
  2. Observation
  3. Problem identification
  4. Surgery
  1. A chemistry defined as
  1. The scientific study of matter, compound, and chemical reaction
  2. The scientific study of compounds, mixture and organic substances
  3. The scientific study of composition structure and properties of matter
  4. The study of relation between human being, medicine, and pollution
  1. A mother at home can apply chemistry to;
  1. Weed flowers in the garden
  2. Dusting the floor of her house
  3. Weighing maize flour
  4. Cooking food in the kitchen
  1. Which of the following illustrates a chemical reaction taking place in our body
  1. Falling sick
  2. Digestion
  3. Respiration
  4. Salivating
  1. Which of the following is not a list of application of chemistry?
  1. Table, chairs and Bricks
  2. Shoe polish, antiseptics and toothpaste
  3. Soap, medicinal drugs and perfumes
  4. Fertilizer, pesticides and herbicides
  1. Which of the following careers does not require the knowledge of chemistry?
  1. Medicine
  2. Agriculture
  3. Archeology
  4. Pharmacy
  1. Identify the skill not acquired during chemistry study
  1. Careful observation
  2. Accurate reporting
  3. Testing hypothesis experimentally
  4. Map reading skills
  1. Individuals who studied chemistry long time ago were called
  1. Alchemists
  2. AL chemistry
  3. Witch doctors
  4. Chemists
  1. You are given LIST A and LIST B. Choose the best response from LIST B that matches with description from LIST A.

LIST A

LIST B

  1. Study of matter
  2. Wanted to convert metals into precious metals
  3. Sense not commonly used in laboratory
  4. Deals with making and dispensing of drugs
  5. Deals with study of living and non -living things
  1. Engineering
  2. Technology
  3. Alchemist
  4. Fertilizer
  5. Eyes
  6. Tongue
  7. Composition
  8. Decomposition
  9. Chemist
  10. Pharmacy
  11. Nursing
  12. Medicine
  13. Matter
  14. Atom
  15. Chemical engineer
  16. Science
  17. physics

(b) Answer the following questions by writing the correct answer on the blank spaces provided.

i) The field of science that deals with crop production and livestock management is called . . . . . . . . . . . .  .  . . . . . . . . .  . . 

ii) Ink, shoe polish, paper, clothes and rubber are examples of things produced from application of knowledge of. . . . . . . . . . . .  .  . . . . . . . . .  . . 

iii) Study of chemistry prepares people for different skills needed in our daily life such as. . . . . . . . . . . .  .  . . . . . . . . .  . . 

iv) Chemicals used to kill insects are called . . . . . . . . . . . .  .  . . . . . . . . .  . . 

v) The study of matter and its properties is called. . . . . . . . . . . .  .  . . . . . . . . .  . . 

SECTION B (80 Marks)

Answer all questions in this section.

3. Mention two items used in each of the following categories that are made through application of chemistry

  1. Agriculture
  2. Pharmaceutical
  3. Household items
  4. Food and beverages
  5. Transport

b) Chemistry has contributed to environmental hazards. Briefly explain how

4. (a) Mention and explain briefly any five warning signs found in chemical containers giving one example in each case.

  1. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . 
  2. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  3. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  4. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  5. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

(b) Distinguish between the following;

i. Hypothesis against fact 

. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

ii. Deposition against sublimation 

. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

5.(a) List down ten laboratory rules

(b) With the help of diagram explain how each of the following lab apparatus works

(i) Condenser (ii) Burette (iii) pipette (iv) deflagrating (v) thermometer

(c) State two aims of the alchemists

(i) _____________________________________________________________________________

(ii) _____________________________________________________________________________

6.Define the following terms;

  1. Laboratory . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  2. First aid . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  3. First aid kit . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  4. Matter . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

7.Explain the causes of the following accidents in the laboratory;

  1. Shock
  2. Bleeding
  3. Skin burn

8.Mention five items found in first aid kit and their functions

9.(a) What do you understand by the term laboratory? . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .. . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

(b) Mention three characteristics of a good laboratory

(i) . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . ..

(ii) . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

(iii) . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

(c) Why is it necessary to put on the following during the conduction of experiments

  1. Laboratory coat . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  2. Plastic goggles . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

10.Name six injuries which can be caused by running in the laboratories or in the corridor of it.

  1. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  2. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  3. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  4. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  5. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .
  6. . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . . . . . . . . . . . . . .  .  . . . . . . . . .  . .

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 39

THE PRESIDENTS OFFICE MINISTRY OF LOCAL GOVERNMENT AND REGIONAL ADMINISTRATION

MIDTERM EXAMINATION MARCH 2021

 CHEMISTRY FORM I

1. Choose the best answer from the alternatives given and write its answer in the space provided.

  1. People who studied chemistry long time ago were called?
  1. Scientists
  2. Chemistry
  3. Chemists
  4. Alchemist
  1. Which is not a branch of science?
  1. Physics
  2. Biology
  3. Mathematics
  4. Geometry
  1. The study of matter in relation to energy is termed as
  1. Physics
  2. Geography
  3. Kinetics
  4. Chemistry
  1. Which of the following is chemistry knowledge not applied?
  1. In hospitals
  2. In industry
  3. In research institutions
  4. At homes
  1. A person who studies chemistry is called
  1. Chemistry
  2. Alchemist
  3. Chemist
  4. Physicist.
  1. Which of the field of study below does not need chemistry knowledge?
  1. Medicine
  2. Agriculture
  3. Vetinery medicine
  4. Geography
  1. Decomposition of matter is also termed as
  1. Building matter
  2. Consolidating matter
  3. Breaking up matter
  4. Synthesizing matter
  1. Which is not a feature of chemistry laboratory?
  1. Large windows
  2. Rough floor
  3. A bit dark
  4. Fitted with water supply
  1. Which is not an importance of studying chemistry?
  1. Help us enter into careers
  2. Through chemistry knowledge, we make several materials
  3. Chemistry knowledge help us to answer difficult questions
  4. Chemistry knowledge enable us understand our bodies well.
  1. An instrument used to measure fixed volume of liquid in laboratory is
  1. Burrete
  2. Beaker
  3. Pipette
  4. Measuring cylinder.

2. Match the correct answer in list A with alternative given in list B by writing the answer of the correct answer in the spaces provided.

LIST A

LIST B

  1. Used to grind solids
  2. Used to heat things to dryness
  3. Used to hold vessels when heating
  4. Apparatus for collecting gases
  5. Used to prepare standard solution
  1. Flask
  2. Volumetric flask
  3. Gas jar
  4. Beehive shelf
  5. Tripod stand
  6. Mortar and pestle
  7. Desiccator.

3. Complete the following sentences with the correct answer.

  1. Breaking up of matter is called . . . . . . . . . . . . . . . . . . . . . . . .
  2. The study of organic compound falls into which branch of chemistry . . . . . . . . . . . . . . . . . . . . . . . . 
  3. Help given to an accident victim before going to the hospital is called . . . . . . . . . . . . . . . . . . . . . . . . 
  4. The word laboratory comes from Greek word  . . . . . . . . . . . . . . . . . . . . . . . . 
  5. An expected incidence that happens and results into injury is called . . . . . . . . . . . . . . . . . . . . . . . . 

4. Explain five significance of studying chemistry

5. Mention five areas where the knowledge of chemistry is applied

6. (a) What is a laboratory?

(b) Mention six rules to follow while in laboratory.

7.(a) What are apparatus?

(b) State four materials used to make laboratory apparatus and for each case give an example.

8. describe five fields that are related to chemistry

9. State the uses of the following apparatus used in chemistry laboratory

  1. Wire gauze
  2. Beaker
  3. Conical flask
  4. Measuring cylinder
  5. Burette

10. Mention and explain five factors that cause accidents in laboratory.

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 36

PRESIDENT'S OFFICE 
REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT 
ANNUAL EXAMINATION 
CHEMISTRYFORM ONE

NAME………………………………………..CLASS……………………………TIME: 2HRS

INSTRUCTIONS:-

-This paper consists of three sections- A, AND B

-Answer all questions in section A and B.

SECTION A: 15 MARKS

  1. Choose the most correct answer from among of the given alternatives and write its letter in the space provided;
  1. The following skills acquired through studying chemistry except;
  1. Careful observation
  2. Accurate reporting
  3. Testing hypothesis experimentally
  4. Map reading skills
  1. Chemistry is a scientific activity because;
  1. Chemistry is studied in schools
  2. Chemistry is interesting subject studied through data collection and analysis.
  3. Knowledge of chemistry is acquired through observation, experimentation and logical reasoning.
  4. It involves study of living and non living things.
  1. The following are laboratory rules except;
  1. Turn off water and gas tap after use
  2. Test any unlabelled substance before using it in the laboratory.
  3. Put off flames which are not in use
  4. Remove obstacles from gang ways.
  1. Splints are among of the first aid kit equipments which of the following sentences set describes its use;
  1. Used to pick up and holding things
  2. Used for cutting bandages or pieces of clothes
  3. Used to support broken bones and is tied using bandages.
  4. Used for holding pieces of bandages or cloth together.
  1. The Bunsen burner is likely to contain soot when;
  1. The air hole is closed
  2. The air hole is open but not fully
  3. The air holes of Bunsen burner are completely open.
  4. The burner is not raised
  5. The gas supply is high
  1. Which of the following takes place in experimental stage?
  1. Rejection of hypothesis
  2. Acceptance of hypothesis
  3. Concluding the scientific findings
  4. Carry out investigations
  1. In scientific procedure, what would be the next step to follow after experiments?
  1. Data interpretation
  2. Conclusion
  3. Observation
  4. Investigation
  1. In her first experiment, Mwajuma dissolved sulphuric acid in water and heat was evolved. In her second experiment he dissolved sugar in water and no heat was evolved or absorbed she conducted that;
  1. Her first experiment was physical change
  2. Both of her experiments were physical change
  3. Her second experiment was chemical change
  4. Her first experiment was chemical change
  1. In most general sense the word combustion means …………….
  1. Burning substance in oxygen or air.
  2. Burning compound of carbon in air.
  3. Burning any fuel in air or oxygen
  4. By chemical combination accompanied by light and heat in which or more reactants is gaseous
  1. 10 grams of copper powder were placed initiation tube containing air. The tube was very strongly for half an hour. At the end experiment;
  1. Copper increased in mass in changed colour
  2. Copper melted into liquid copper form.
  3. The total mass of tube and its content decreased.
  4. Water vapour appeared in the tube.

i

ii

iii

iv

v

vi

vii

viii

ix

x

  1. Match the items in List A with their correspondence items in List B.

LIST A

LIST B

  1. Separation of wanted or unwanted solid from mixture.
  2. Method of separating basing on the solubilities of solids in miscible solvents.
  3. A solid that is formed out of solution.
  4. Is used to test purity of organic substance.
  5. Is the best method for separation of liquid mixtures.
  6. Any solid that does not pass through the filter paper.
  7. Substance that can sublime.
  8. Is used to extract salts from sea or lakes.
  9. Drops of coloured oils in water.
  10. Solid particles with regular shape.
  1. Emulsion paint
  2. Emulsion point
  3. Precipitates
  4. Precipitation
  5. Residue
  6. Filtrates
  7. Simple distillation
  8. Fractional distillation
  9. Evaporation
  10. Filtration
  11. Contaminated water
  12. Crystals
  13. Hand picking
  14. Chromatography
  15. Aluminium chloride
  16. Ammonium sulphate

  1. All materials used for preventing rusting aim at preventing water and oxygen from reaching the iron.
    Write T for correct statement and F for incorrect statement;
  1. Accidents always happen in the laboratory.
  2. All experiments must be done in the fume cupboards.
  3. Rusting cannot cause corrosive to some articles made up iron or steel.
  4. Desiccator is an apparatus used to dry solid chemicals.

SECTION B 80 MARKS
(a) Define the following terms;z

  1. Combustion ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….
  2. Combustible material ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….

(b) Label the parts marked A, B, C, D, E and F in the diagram below; 

image

  1. ………………………………………..
  2. ………………………………………..
  3. ……………………………………….
  4. ………………………………………..
  5. ………………………………………..
  6. ………………………………………..

(c) What is the importance of parts labelled? 

B ………………………………………………………………………………………

C ………………………………………………………………………………………

D ……………………………………………………………………………………….

  1. Fill the suitable word in the space provided;

(a)Bronze is an alloy formed by mixing ……………… and ………………………. 

(b)Steel is an alloy formed by mixing ………………… and ………………………. 

(c)…………………… is a solution in which like solvent used is not water. 

(d)…………………….. is used to stir and mix substance uniformly. 

  1. (a) Define the following terms and give one example in each case;
  1. A chemical symbol ……………………………………………………………………………………………………………………………………………………………………………………
  2. An element ……………………………………………………………………………………………………………………………………………………………………………………
  3. A compound ……………………………………………………………………………………………………………………………………………………………………………………
  4. Suspension ……………………………………………………………………………………………………………………………………………………………………………………

(b) Write names of elements represented by the following symbols

i.Au ……………………………………

ii. Ag …………………………………….

iii. Hg ……………………………………..

iv. P ………………………………………..

v. Sn …………………………………………

  1. Draw apparatus which are used to perform the following process in the laboratory;

Process 

Apparatus diagram 

(a)It is used to measure accurate 20/25cm3 of liquid. 

(b)A flat apparatus at the base used to hold volume of liquid during experiment. 

© Wire placed on top of tripod stand. 

(d)Used for scooping small quantities of powder or crystalline chemicals. 

(e)Used for holding heating and mixing liquid – it measures estimate volume of liquids. 

  1. (a) Mention and explain briefly any five warning signs found in chemical containers

giving one example in each case. 

i)………………………………………………………………………………………………………………………………………………………………………………

ii)………………………………………………………………………………………………………………………………………………………………………………

iii)………………………………………………………………………………………………………………………………………………………………………………

iv)………………………………………………………………………………………………………………………………………………………………………………

v)………………………………………………………………………………………………………………………………………………………………………………

(b) Distinguish between the following; 

i.Hypothesis against fact ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

ii. Deposition against sublimation ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(c) Point out any 6 differences between metals and non – metals ; 

Metals 

Non metals 

  1. (a) Briefly explain any five methods of preventing rusting.

i)………………………………………………………………………………………………………………………………………………………………………………

ii)………………………………………………………………………………………………………………………………………………………………………………

iii)………………………………………………………………………………………………………………………………………………………………………………

iv)………………………………………………………………………………………………………………………………………………………………………………

v)………………………………………………………………………………………………………………………………………………………………………………

(b) A certain pink coloured compound is heated to form blue colour. When water is 
added to sample , it changed back to pink. 

i. What change is demonstrated by the compound …………………………………....

ii. Explain the reasons for your choice. 

…………………………………………………………………………………………………………………………………………………………………………………………...….

(c) State the type of changes demonstrated by the following phenomenon; 

  1. Burning of firewood ……………………………………………………….
  2. Rotting of meat …………………………………………………………….
  3. Heating frying pan …………………………………………………………..
  4. Melting of butterfat …………………………………………………………
  5. Change of cloud to rain ……………………………………………………..
  6. Heating of iron rod …………………………………………………………..
  1. Your provided with the diagrams below, study it carefully and answer questions that follows;

iron-nails-1

(a)State short and clear description about what will be observed in each test tube A – D after 2 or 3 days; 

  1. Test tube A. ………………………………………………….
  2. Test tube B …………………………………………………..
  3. Test tube C. …………………………………………………..
  4. Test tube D. …………………………………………………..

(b)Why the water in the test tube D boiled the covered with oil. ……………………………………………………………………………………………………………………………………………………………………………………

(c)What is the function of calcium chloride in test tube B? …………………………………………………………………………………………………………………………………………………………………………………….

(d)What conclusion can you draw from your experiment? …………………………………………………………………………………………

(e)(i) Give two similarities between combustion and rusting …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(ii) Give two differences between combustion and rusting …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 26

THE PRESIDENT'S OFFICE

MINISTRY OF REGIONAL GOVERNMENT AND LOCAL GOVERNMENT

AUGUST-SEPTEMBEREXAMINATION SERIES

CHEMISTRYFORM-1

2020

2:30 HOURS

INSTRUCTIONS.

  1. This paper consists of sections A and B with a total of ten (10) questions.
  2. Answer all questions in spaces provided.
  3. All writing must be in blue or black ink except drawing which must be in pencil.
  4. Calculators, cellular phones and any unauthorized materials are not allowed in the examination room.
  5. Write your Examination Number at the top right corner of every page.
  6. The following atomic masses may be used; H =1, N =14, O = 16, S = 32, Ca = 40

SECTION A (20 Marks)

Answer all questions in this section.

1.For each of the items (i) –(x), choose the correct answer from the among the given alternatives and write its letter in the box provide.

(i) What is the best way of keeping a clean test tube after use?

  1. Keeping it in water
  2. Keeping it on a test tube holder
  3. Keeping it in a basin for test tubes
  4. Keeping it on a test tube rack.

(ii) Which one of the following does not involve the processes of urban water treatment and purification?

  1. Sedimentation
  2. Distillation
  3. Filtration
  4. Chlorination.

(iii) Why hydrogen gas is not a constituent of air?

  1. Because of being water soluble
  2. Because of being denser than air
  3. Because of being very light
  4. Because of being highly flammable.

(iv) Which is the suitable alternative heat source to be used in absence of Bunsen Burner?

  1. Torch and spirit burner
  2. Torch and kerosene stove
  3. Kerosene stove and spirit burner
  4. Firewood and torch.

(v) What happens when substance A reacts with substance B to form a new substance C?

  1. Substance A and B are said to have formed a solution
  2. Substance A and B are said to have undergone a physical change.
  3. Substance A and B are said to have undergone a chemical change.
  4. Substance A and B are said to have undergone a dissolution.

(vi) Which components make fire triangle?

  1. Oxygen, fuel and heat
  2. Oxygen, nitrogen and heat
  3. Oxygen, fuel and carbon dioxide
  4. Oxygen, heat and hydrogen.

(vii) Which state is involved when drying wet clothes?

  1. Liquid to solid
  2. Solid to gas
  3. Gas to liquid
  4. Liquid to gas.

(viii) Why Non – luminous flame is the most applicable flame for heating purposes?

  1. It is very nosy
  2. It has no soot.
  3. It is very hot
  4. It has air holes open

(ix)  Chemistry is a branch of Science which deals with:

  1. matter in relation to energy.
  2. matter in relation to decomposition.
  3. matter composition and its decomposition.
  4.  properties of conservation of matter.

(x) The process of removing solid contaminants from water is known as:

  1.  water decantation.
  2. water solidification. 
  3. water purification.
  4. water sedimentation.

2. (a) Match each item in List A with a correct response in List B by writing the letter of the correct response below the corresponding item number in the table provided.

List A

List B

(i)A solvent which dissolves most substances to form solution.

(ii)A substance that has no definite shape or size.

(iii)A substance that has a fixed shape and volume

(iv)A substance whose components can be separated by physical means

(v)Homogeneous mixture of two or more substances.

  1. Solid
  2. Solution
  3. Water
  4. Sugar
  5. Milk
  6. Gas
  7. Liquid
  8. Air

(b) Fill in the blank spaces by using the appropriate terms

(i)Solid particles formed after filtration......................

(ii)Serum is separated from blood samples by employing a technique called………………..

(iii)Boiling points of substances reflect the strength of……………….

(iv)Grinding chalk into a powder involves changing the state of …………………….

(v) The liquid formed after filtration..........................

SECTION B (80 Marks)

Answer all questions in this section.

3. (a) State one use of each of the items (i) – (x) in administering First Aid.

S/N

Item

Use

(i)

Soap


(ii)

Bandage


(iii)

Sterile gauze


(iv)

Iodine tincture


(v)

Petroleum jelly


(b) Give one function of each of the following apparatus in the chemistry laboratory.

(i) Spatula…………… …………… ……………….

(ii) Gas jar…………… ……………. …… ……….

(iii) Lie – big condenser …………… …… …………

(iv) Motor and pestle…… …………… ……………

(v) Wire gauze… ………… ………… …………….

4. (a) Differentiate hypothesis from analysis.

(b) Effective use of the four senses of observation is important before a chemist can make conclusion. With four points, show how the senses are used as tools of observation during experimentation by giving one example for each.

(i)………… ………… ……………

(ii)………… …………… ………….

(iii)………… ……………… …… ….

(iv)………… …………… ……………

5. What precautions will you take in handling chemicals having the warning signs shown in the table? Give two precautions in each sign.

S/N

Sign

Relevant Precaution

a)

C:UsersKYAMBODesktopeplosive.jpgEXPLOSIVE

(i)………… ……… …………… ….

(ii)………… ………… …………….

b)

C:UsersKYAMBODesktopflammable.jpgFLAMMABLE

(i)…………… …………… ….

(ii)………… ………… …… ….

c)

C:UsersKYAMBODesktop1200px-GHS-pictogram-skull.svg.pngTOXIC

(i)…… …………… …………….

(ii)……… …………… ………….

d)

C:UsersKYAMBODesktopcorrosive.jpgCORROSSIVE

(i)…………… ……………… …….

(ii)…………… ………… ………….

e)

OXIDANT

(i)…………… ……… …………….

(ii)…………… …………… ……….

6. Briefly explain the five classes of fires based on the nature of the burning material and the extinguisher required. Give one example for each class.

7.  Explain three factors which affect the problem being investigated (b) Explain two areas where scientific procedure is applied.

8.  Explain each of the following terms:

(i)Burn

(ii) Bruises

(iii)Fainting ..............................................

(b)  What are the six procedures which can be used to help a person with severe bleeding on the wound?

9. Give three differences between the following:

(i)Physical changes and chemical changes

(ii)Mixture and compounds

10.(a) Define the following terms as applied in Chemistry:

(i)Flame 

(ii)Bunsen burner

(iii)Laboratory

(b) List four properties of each of the following:

(i)  A luminous flame

(ii)  A non-luminous flame

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 18

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION AND VOCATIONAL TRAINING

FORM ONE MID TERM EXAMINATION- MARCH 2020

CHEMISTRY

 

Duration: 2:30 Hours

 

INSTRUCTIONS.

 

  1. This paper consists of sections A and B with a total of ten (10) questions.
  2. Answer all questions in spaces provided.
  3. All writing must be in blue or black ink except drawing which must be in pencil.
  4. Calculators, cellular phones and any unauthorized materials are not allowed in the examination room.
  5. Write your Examination Number at the top right corner of every page.

 

 

SECTION A (20 Marks)

Answer all questions in this section.

 

1. For each of the items (i) –(x), choose the correct answer from the  among the given alternatives and write its letter in the box provide.

 (i) Chemistry is one of the sciences which deal with.

  1.              Alkalinity and basicity of substances.
  2.               The study of body cells
  3.               Composition, properties and behavior if matter.
  4.              Chemical changes.

(ii) A pipette is sued for:

  1.              Measuring distance of length
  2.               Measuring specific volume of liquids
  3.               Measuring volumes
  4.              Heating liquid

(iii) The states of matter are:-

  1.              Element, gas and mixture
  2.               Liquid, moisture and element
  3.               Water, moisture and solid
  4.              Gas, liquid and solid.

(iv) In chemistry experiments test:

  1.              Data
  2.               Problems
  3.               Hypotheses
  4.              Observation

(v) Which of the following sets of apparatus are suitable for measuring volume of solutions?

  1.              Burette, pipette and beaker.
  2.               Burette, pipette and conical flask.
  3.               Measuring cylinder, burette and pipette.
  4.              Burette, flax bottomed flask and pipette.

(vi) The substance that can burn your skin is best described as:

  1.              Flammable
  2.               Corrosive
  3.               Explosive
  4.              Toxic

(vii) Sublimation is the process whereby:-

  1.              Substances float in liquids when heated.
  2.               A solid substance changes directly to vapour without the liquid states when heated
  3.               A mixture of solid substances is separated by heating
  4.              An alcohol is separated from water.

(viii) One of the following apparatuses is used to measure a fixed volume of liquids.

  1.              Pipette
  2.               Burette
  3.               Measuring cylinder
  4.              Beaker

(ix) Coloured substances can be separated through the process called?

  1.              Filtration
  2.               Chromatography
  3.               Distillation
  4.              Sublimation.

(x) Acid changes colour litmus paper form:

  1.              Blue to yellow
  2.               Red to blue
  3.               Red to pink
  4.              Blue to red

 

2. (a) You are provided with two lists, A and B. Choose a word(s) from list B which matches the statement in list and write its letter against the appropriate statement in the space provided.

 

List A

List B

(i)     Studied chemistry long time ago

(ii)  An intelligent guess

(iii) Making sense of information

(iv) Is used to measure fixed volume of a liquid

(v)   A Series of investigation aimed at discovering a fact.

  1. experiment
  2. Experimentation
  3. Air
  4. Data analysis
  5. pipette
  6. Wire gauze
  7. solution
  8. hypothesis
  9. alchemists
  10. chemists

 

 

 

 (b) Fill in the blank spaces by using the appropriate terms.

  1. Used in measuring mass…………………….
  2. The person who studies chemistry…….
  3. The people who studied chemistry long time ago……
  4. Studies composition and decomposition of matter…..
  5. A proved hypothesis………………..

 

SECTION B (80 Marks)

Answer all questions in this section.

 

3. (a) What is matter?

    (b) Mention three (3) states of matter.

 

4. (a) Write the chemical symbols for the following

(i)     Lead

(ii)  Potassium

(iii) Gold

(iv) Sodium

(v)   Chlorine

     (b) Define the term:

(i)     First Aid

(ii)  First Aid Kit

 

5. (a) Which method would you use to separate each of the following mixture?

(i)     Water mixed with kerosene

(ii)  Iron powder mixed with sand

(iii) Ammonium chloride crystals mixed with sodium chloride crystal

(iv) Water mixed with alcohol

    (b)    Give one function of each of the following apparatus in the chemistry laboratory.

 (i) Spatula…………………………………………………………………………….

 (ii) Gas jar…………………………………………………………………………….

 (iii) Lie – big condenser……………………………………………………………..

 (iv) Motor and pestle…………………………………………………………………

 (v) Wire gauze………………………………………………………………………..

 

6. (a) Mention any three laboratory rules

    (b) Name any three places or areas where the knowledge of Chemistry is applied.

 

7. (a) Mention any four instruments found in First Aid Kit

    (b) Write the names of the following processes of changing matter from one state to another.

(i)     Solid to liquid

(ii)  Liquid to gas

(iii) Gas to liquid

(iv) Liquid to solid

 

8. (a) Define with one example:

(i)     Element

(ii)  Compound

     (b) Compare physical change and chemical change.

 

 

9. (a) Why are there laboratory rules? (Give two reasons)

    (b) Suppose your laboratory does not have any water, mention two possible dangers of using it.

 

 

10. (a) Differentiate hypothesis from analysis.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 

     (b) Effective use of the four senses of observation is important before a chemist can make conclusion. With four points, show how the senses are used as tools of observation during experimentation by giving one example for each.

(i)     ……………………………………………………………………………………………………….

(ii)  ……………………………………………………………………………………………………….

(iii) ……………………………………………………………………………………………………….………………………………………………………………………………………………….

LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY EXAM SERIES 1

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