CHEMISTRY FORM ONE NEW NECTA FORMAT EXAM

CHEMISTRY FORM ONE NEW NECTA FORMAT

THE PRESIDENT’S OFFICE

REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

FORM ONE ANNUAL EXAMINATION

CHEMISTRY

TIME: 3 HOURS         NOVEMBER 2024

Instructions

1. This paper consists of sections A, B and C with a total of ten (10) questions.

2. Answer all questions. All answers must be written in the spaces provided.

3. Section A and C carry fifteen (15) marks each, Section B carries seventy (70)

marks.

4. All writing must be in blue or black ink except drawings which must be in pencil.

5. All communication devices, calculators and any unauthorized materials are not

allowed in the Mock Assessment room.

6. Write your Mock Assessment Number at the top right corner of every page.

7. The following atomic masses may be used: H = 1, C = 12, O = 16, Na = 23,

S = 32, Ca = 40.

SECTION A (15MARKS)

Answer all questions in this section.

1. For each of the following (i)-(x) choose correct answer from alternative given

i. One of the following apparatus is used to measure a fixed volume of liquids

A. Pipette

B. Burette

C. Measuring cylinder

D. Beaker

ii. Coloured substance can be separated through process called

A. Filtration

B. Chromatography

C. Distillation

D. Sublimation

iii. Which of the groups of substance represents flammable liquid

A. Petrol, Pesticides, Hydrogen

B. Petrol, Sulphuric acid, Methylated spirit

C. Methylated spirit, Petrol, Kerosine

D. Kerosine, Diesel, Hot water

iv. Acid changes colour litmus paper from

A. Blue to Yellow

B. Red to Blue

C. Red to pink

D. Blue to Red

v. Chemistry is a scientific activity because

A. Chemistry is studied in school

B. Chemistry knowledge is acquired through observation experimentation and logical reasoning

C. It is an interesting subject

D. It involves the study of non-living things

vi. On her first experiment, Lilian Dissolved sulphuric acid in water and heat was evolved. In her second experiment she dissolved sugar in water and no heat was evolved or absorbed. She conclude that;

A. Her first experiment was physical change

B. Both Of her experiment were physical change

C. Her second experiment was a chemical change

D. Her first experiment was a chemical change

vii. Loose or floppy clothing is not allowing in the laboratory, why

A. Movement has to be fast

B. It will get wet when water splashes

C. It may catch fire or cause one to fall

D. It cause poor ventilation in the body

viii. Which of the following is not a component of First Aid Kit

A. Googles

B. Gloves

C. Dropper

D. Pair of scissors

ix. If you want Bunsen Burner Flame to have the same colour on the candle flame you must

A. Have air hole completely  open

B. Turn on a large supply of gas

C. Have the air hole completely closed

D. Have more candle burning

x. A rapid chemical reaction that release energy in form of light and noticeable heat is called

A. Ignition

B. Reactant

C. Combustion

D. Heating

2. Match the mixture in List A with the corresponding method of separation in List B by writing the letter of correct answer below item number.

LIST  A

LIST B

i. Ethanol from water

ii. Salt from sea water

iii. Rice from husk

iv. Oil in sun flower

v. Erythrocycles from blood

A. Chromatography

B. Filtration

C. Solvent extraction

D. Fractional Distillation

E.  Decantation

F. Layer separation

G. Centrifugation

H. Winnowing

I. Simple distillation

J. Evaporatio

SECTION B

Answer all question

3. a) Is air a mixture or a compound. Give four reasons

b) A form two student dipped a clean in rod into a cold distilled water in a test-tube and left it for 2 days

i. State what will happen to iron after two days.

ii. Explain the observation if the rod is replaced by a painted nail in the same test tube and left there for 2 days

iii. Explain the observation if cold distilled water will be replaced by a mixture of hot water an oil

c) Explain any two methods that can be used to prevent iron from rusting by giving vivid example

4. a) Differentiate

i. Homogeneous mixture from heterogeneous mixture

ii. Miscible from immiscible liquids

b) Saypalm was in kitchen frying eggs container A and by the same time he submitted solid Iodine in other container which was labelled B

i. What changes were encounted by two substance mention two

ii. State the difference which exists between changes in (a)  (i) by providing three points

5. a)  Identify types of change involved in each of the following

i. Respiration

ii. Sublimation

iii. Combustion

iv. Distillation

b) Write the chemical symbol of the following

i. Potassium

ii. Sodium

iii. Mercury

iv. Gold

c) Write the most suitable method of separating the following mixture

i. Air

ii. Kerosene and water

iii. Iodine and sand

iv. Syrup

6. a) What do you understand by the term fire

b) Mushi Burned a piece of wood and result were energy and light

i. Name chemical reaction involved

ii. What is the name of given to piece of wood in this reaction

iii. With one example write three areas where chemical reaction in (b) (i) above is applied

7. a) Laboratory technician planned to label warning signs on container found in laboratory. Suggest the name of warning sign he could label on the container with the following;

i. Rat poison

ii. Methylated spirit

iii. Hydrogen peroxide

iv. Concentrated sulphuric acid

v. Cooking gas

b) Briefly explain how you can help an individual who has fainted

8. a) Define a flame

b) Identify factors (2) to consider when choosing a flame

c) Write five properties of luminous flame

9.  a) Justine is not interested in studying chemistry. Briefly explain to him five reasons why he should study chemistry.

b) With examples indicate five areas where chemistry is applied.

SECTION C 15 marks

10. a) Differentiate between

i. An element and an atom

ii. A compound and mixture

b) What should you do immediately if;

i. A piece of paper of broken beaker cuts your figure

ii. Chemical splash on your face

iii. Your shirt has caught fire

iv. Your fellow student swallow unknown chemical substance thinking that it was water

c) State the uses of the following in first Aid

i. The pair of scissors

ii. Petroleum jelly

iii. Whistle

iv. Sterile gauze

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LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY MODAL SERIES 20
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MODEL EXAM PAPER 2

CHEMISTRY EXAM

FORM 1

NAME��..CLASS��TIME: 2HRS

INSTRUCTIONS:-

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

-�� Answer all questions in section A and B.

SECTION A: 25 MARKS

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Choose the most correct answer from among of the given alternatives and write its letter in the space provided;

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The following skills acquired through studying chemistry except;

Careful observation

Accurate reporting

Testing hypothesis experimentally

Map reading skills

�

Chemistry is a scientific activity because;

Chemistry is studied in schools

Chemistry is interesting subject studied through data collection and analysis.

Knowledge of chemistry is acquired through observation, experimentation and logical reasoning.

It involves study of living and non living things.

�

The following are laboratory rules except;

Turn off water and gas tap after use

Test any unlabelled substance before using it in the laboratory.

Put off flames which are not in use

Remove obstacles from gang ways.

�

Splints are among of the first aid kit equipments which of the following sentences set describes its use;

Used to pick up and holding things

Used for cutting bandages or pieces of clothes

Used to support broken bones and is tied using bandages.

Used for holding pieces of bandages or cloth together.

�

�� The Bunsen burner is likely to contain soot when;

The air hole is closed

The air hole is open but not fully

The air holes of Bunsen burner are completely open.

The burner is not raised

The gas supply is high

�

Which of the following takes place in experimental stage?

Rejection of hypothesis

Acceptance of hypothesis

Concluding the scientific findings

Carry out investigations

�

In scientific procedure, what would be the next step to follow after experiments?

Data interpretation

Conclusion

Observation

Investigation

�

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;

Her first experiment was physical change

Both of her experiments were physical change

Her second experiment was chemical change

Her first experiment was chemical change

�

In most general sense the word combustion means ��.

Burning substance in oxygen or air.

Burning compound of carbon in air.

Burning any fuel in air or oxygen

By chemical combination accompanied by light and heat in which or more reactants is gaseous

�

10 grams of copper powder were placed initiation tube containing air. The tube was very strongly for half an hour. At the end experiment;

Copper increased in mass in changed colour

Copper melted into liquid copper form.

The total mass of tube and its content decreased.

Water vapour appeared in the tube.

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

LIST A

LIST B

Separation of wanted or unwanted solid from mixture.

Method of separating basing on the solubilities of solids in miscible solvents.

A solid that is formed out of solution.

Is used to test purity of organic substance.

Is the best method for separation of liquid mixtures.

Any solid that does not pass through the filter paper.

Substance that can sublime.

Is used to extract salts from sea or lakes.

Drops of coloured oils in water.

Solid particles with regular shape.

Emulsion paint

Emulsion point

Precipitates

Precipitation

Residue

Filtrates

Simple distillation

Fractional distillation

Evaporation

Filtration

Contaminated water

Crystals

Hand picking

Chromatography

Aluminium chloride

Ammonium sulphate

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i

ii

iii

iv

v

vi

vii

viii

ix

x

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Write T for correct statement and F for incorrect statement;

All materials used for preventing rusting aim at preventing water and oxygen from reaching the iron.

Accidents always happen in the laboratory.

All experiments must be done in the fume cupboards.

Rusting cannot cause corrosive to some articles made up iron or steel.

Desiccator is an apparatus used to dry solid chemicals.

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ii

iii

iv

v

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SECTION B: 75 MARKS

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(a) Define the following terms;

Combustion ��.

Combustible material ��.

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

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(c) What is the importance of parts labelled?

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�� C ��

�� D ��.

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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.

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(a) Define the following terms and give one example in each case;

A chemical symbol ��

An element ��

A compound ��

Suspension ��

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

�� i.� Au ��

�� ii. Ag ��.

�� iii. Hg ��..

�� iv. P ��..

�� v. Sn ��

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

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Process

Apparatus diagram

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

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

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(c)�� Wire placed on top of tripod stand.

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

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

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

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(b) Distinguish between the following;

�i.�� Hypothesis against fact ��

ii. Deposition against sublimation ��

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

Metals

Non metals

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

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(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.

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

Burning of firewood ��.

Rotting of meat ��.

Heating frying pan ��..

Melting of butterfat ��

Change of cloud to rain ��..

Heating of iron rod ��..

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Your provided with the diagrams below, study it carefully and answer questions that follows;

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

Test tube A. ��.

Test tube B ��..

Test tube C. ��..

Test tube D. ��..

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(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 ��

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1 | Page

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LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY MODAL SERIES 12
�

MODEL EXAM PAPER 2

CHEMISTRY EXAM

FORM 1

NAME��..CLASS��TIME: 2HRS

INSTRUCTIONS:-

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

-�� Answer all questions in section A and B.

SECTION A: 25 MARKS

�

Choose the most correct answer from among of the given alternatives and write its letter in the space provided;

�

The following skills acquired through studying chemistry except;

Careful observation

Accurate reporting

Testing hypothesis experimentally

Map reading skills

�

Chemistry is a scientific activity because;

Chemistry is studied in schools

Chemistry is interesting subject studied through data collection and analysis.

Knowledge of chemistry is acquired through observation, experimentation and logical reasoning.

It involves study of living and non living things.

�

The following are laboratory rules except;

Turn off water and gas tap after use

Test any unlabelled substance before using it in the laboratory.

Put off flames which are not in use

Remove obstacles from gang ways.

�

Splints are among of the first aid kit equipments which of the following sentences set describes its use;

Used to pick up and holding things

Used for cutting bandages or pieces of clothes

Used to support broken bones and is tied using bandages.

Used for holding pieces of bandages or cloth together.

�

�� The Bunsen burner is likely to contain soot when;

The air hole is closed

The air hole is open but not fully

The air holes of Bunsen burner are completely open.

The burner is not raised

The gas supply is high

�

Which of the following takes place in experimental stage?

Rejection of hypothesis

Acceptance of hypothesis

Concluding the scientific findings

Carry out investigations

�

In scientific procedure, what would be the next step to follow after experiments?

Data interpretation

Conclusion

Observation

Investigation

�

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;

Her first experiment was physical change

Both of her experiments were physical change

Her second experiment was chemical change

Her first experiment was chemical change

�

In most general sense the word combustion means ��.

Burning substance in oxygen or air.

Burning compound of carbon in air.

Burning any fuel in air or oxygen

By chemical combination accompanied by light and heat in which or more reactants is gaseous

�

10 grams of copper powder were placed initiation tube containing air. The tube was very strongly for half an hour. At the end experiment;

Copper increased in mass in changed colour

Copper melted into liquid copper form.

The total mass of tube and its content decreased.

Water vapour appeared in the tube.

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i

ii

iii

iv

v

vi

vii

viii

ix

x

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

LIST A

LIST B

Separation of wanted or unwanted solid from mixture.

Method of separating basing on the solubilities of solids in miscible solvents.

A solid that is formed out of solution.

Is used to test purity of organic substance.

Is the best method for separation of liquid mixtures.

Any solid that does not pass through the filter paper.

Substance that can sublime.

Is used to extract salts from sea or lakes.

Drops of coloured oils in water.

Solid particles with regular shape.

Emulsion paint

Emulsion point

Precipitates

Precipitation

Residue

Filtrates

Simple distillation

Fractional distillation

Evaporation

Filtration

Contaminated water

Crystals

Hand picking

Chromatography

Aluminium chloride

Ammonium sulphate

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i

ii

iii

iv

v

vi

vii

viii

ix

x

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�

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Write T for correct statement and F for incorrect statement;

All materials used for preventing rusting aim at preventing water and oxygen from reaching the iron.

Accidents always happen in the laboratory.

All experiments must be done in the fume cupboards.

Rusting cannot cause corrosive to some articles made up iron or steel.

Desiccator is an apparatus used to dry solid chemicals.

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i

ii

iii

iv

v

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SECTION B: 75 MARKS

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(a) Define the following terms;

Combustion ��.

Combustible material ��.

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

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(c) What is the importance of parts labelled?

�� B ��

�� C ��

�� D ��.

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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.

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(a) Define the following terms and give one example in each case;

A chemical symbol ��

An element ��

A compound ��

Suspension ��

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

�� i.� Au ��

�� ii. Ag ��.

�� iii. Hg ��..

�� iv. P ��..

�� v. Sn ��

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

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Process

Apparatus diagram

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

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

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(c)�� Wire placed on top of tripod stand.

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

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

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

�� giving one example in each case.

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(b) Distinguish between the following;

�i.�� Hypothesis against fact ��

ii. Deposition against sublimation ��

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

Metals

Non metals

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

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(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;

Burning of firewood ��.

Rotting of meat ��.

Heating frying pan ��..

Melting of butterfat ��

Change of cloud to rain ��..

Heating of iron rod ��..

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Your provided with the diagrams below, study it carefully and answer questions that follows;

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

Test tube A. ��.

Test tube B ��..

Test tube C. ��..

Test tube D. ��..

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(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 ��

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1 | Page

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LEARNINGHUBTZ.CO.TZFORM ONE CHEMISTRY MODAL SERIES 11
MODEL EXAM PAPER 3

CHEMISTRY EXAM

FORM 1

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

INSTRUCTIONS:-

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

-          Answer all questions in section A and B.

SECTION A. (20 marks)

Choose the letter of the best answer in the multiple chooses i-x and write the answer in the space provided

(i)                What is chemistry? It is the study of

Chemicals and equipments

Behavior of matter

Conservation of matter

Chemical composition of matter

(ii)              A simple proof that some chemical reactions take place in our bodies is that

We occasionally fall sick

Doctors tell us so in the hospital

We eat balanced diet

The food we eat or the drinks, we take or quite different from the waste products from our bodies

(iii)            What is the characteristics of an oxidizing (strong heating) flame

Yellow

Blue

Irregular

Quiet

(iv)            If a chemical substance can easily destroy surface of other substances which warning sign is appropriate for it?

Corrosive symbol

Toxic symbol

Carcinogenic symbol

Harmful symbol

(v)              The following are found in the first aid kit except

Assorted bondages

Amoxyl tablets

Pain killer

Antiseptic

(vi)            Which step in the scientific procedure can be related to an aim of an experiment?

Statement of a problem

Formation of hypothesis

Observation and data collection

Data analysis and interpretation

(vii)          The burning of charcoal, rusting of iron and explosion of hydrogen in air may be classified as

Dangerous and delicate reaction

Chemical changes

Physical changes

Easily reversible reaction

(viii)       Matter exist in three stages these are

Solid, vapour and gas

Heat, light and sound

Liquid, solid and water

Liquid, solid and gas

(ix)            Pick the odd man out from the following

Destructive distillation of coal

Fractional distillation of crude oil

Alcohol production by distillation

Condensation of steam to get water

(x)              An example of a physical change is when

Firewood burns to form ashes

Iron nail from rust

Hydrogen peroxide decomposes to form water and oxygen

Steam change to clouds and then to rain

i

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viii

ix

x

Choose a respond from column B which best matches with a statement in column A and write in the space provided

Column A.

(i)                Heterogeneous mixture

(ii)              Substance which catches fire easily

(iii)            Liquid metal

(iv)            Used to prevent direct heat to reach the apparatus

(v)              Element

(vi)            Example of a compound

(vii)          Used to date

(viii)       Emulsion

(ix)            Evaporation

(x)              Symbol of zinc

Column B

Is the process where liquid changes into gaseous

Is the phenomenon where liquid change into chemical

Are mixtures which do not mix accordingly

Sediments deposit at the base

Carbon fourteen

Carbondioxide

Sugar, ethanol and water

Salt, ammonium chloride and air

Is the substance which cannot be split up into any simpler substance by any chemical means

Is the process of splitting up the micro-substance into macro-substance

Wire gauze

Tripod stand

Mercury

Sodium

Flammable

Oxidizing agent

Oil and water

Sugar solution

Zc

Zn

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x

SECTION B. (54 MARKS)

(a) Metallic shinny lustre is physical property of _________________________ while very weak inter- molecular forced of attraction is the physical property of ______________. High molecular compaction is another characteristics of _____________________________

(b) There is an increase in mass of a substance which burnsin air and this is a characteristics of ___________________________ change. Energy conservation when a substance changes from one state to another is a property of ___________________________ change

(a) Motion of particles is Radom in _______________________________ and ___________________ state of matter while it is vibratory in ________________________________ state of matter.

(b) if a moving particle takes up ______________________ energy it increases its _____________________ energy and moves __________________________. This may lead to change of _________________________________ for non gaseous substance

Study the diagram below:

(i)                                                  (ii)                                              (iii)

(a) Name the three states of matter by the above diagrams

(i)                _____________________________________________________

(ii)              _____________________________________________________

(iii)            _____________________________________________________

(b) Write (i) or (ii) or (iii) against the following statement

A diagram whose particles are closest due to strong attractive force___________________

A diagram whose particles are very far apart due to weakest force of attraction ______________________________

A diagram whose particles are highly compressible __________________

(a) Draw well labeled diagram of the following laboratory apparatus

Conical flask

Condenser

Asbestos wire gauze

(b) Write against each name of a laboratory apparatus the function of each of them:

(i) Test tube rack ________________________________________________

(ii) Thermometer ________________________________________________

(iii) Spatula _______________________________________________________

Draw and name the chemical symbols which will be found with the following chemicals

Methylated spirit

Sodium cyanide

Sulphuric acid concentrated

Write “T” for true statement and “F” for force statement

All heterogeneous mixtures are suspensions __________________

All suspensions are heterogeneous mixtures ________________

Smoke in air is a suspension _______________

One example of emulsion is colour paint _____________

An example of an alloy is brass _____________

Air is a compound _____________

Write English names of the following symbols:

(i)                Br __________________________________

(ii)              Hg __________________________________

(iii)            H ____________________________________

(iv)            Na ______________________________________

(v)              K __________________________________________

(vi)            I ______________________________________________

(a) Mention three examples of physical change of matter

(i)                _______________________________________

(ii)              _______________________________________

(iii)            _______________________________________

(b) Mention three examples of chemical change of matter

(i) ____________________________________________________

(ii) _____________________________________________________

(iii) _____________________________________________________

(a) Define the following terms:

(i)                First Aid kit __________________________________________________________________________________________________________________________________________________________________________________

(ii)              First Aid __________________________________________________________________________________________________________________________________________________________________________________

(b) Write the uses of the following materials of the first aid kit

(i) A pair of scissors ______________________________________________

(ii) Medicated soap _______________________________________________

(iii)            Antibiotic solution _________________________________________

(iv)            Razor blade ___________________________________________________

SECTION C. (20 MARKS)

(a) What is a flame?

(b) Write five differences between a luminous flame and a non luminous flame

(c) Draw a well labeled diagram of a luminous flame

(d) Draw a well labeled diagram of a non luminous flame

(e) Mention two advantages of a Bunsen burner over other sources of heat in the laboratory

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