CHEMISTRY FORM ONE NEW NECTA FORMAT

 

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

 

  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.

 

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  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

 

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

 

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SECTION B: 75 MARKS

 

  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;

 

 

 

 

 

 

  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.

 

 

 

 

 

 

 

 

 

 

 

 

(c)      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 flame;

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;

 

 

(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 …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 

 

 

 

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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

 

  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

 

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vi

vii

viii

ix

x

 

 

 

 

 

 

 

 

 

 

 

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

 

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SECTION B: 75 MARKS

 

  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;

 

 

 

 

 

 

  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.

 

 

 

 

 

 

 

 

 

 

 

 

(c)      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 flame;

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;

 

 

(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 …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 

 

 

 

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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)

  1. 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

  1. Chemicals and equipments
  2. Behavior of matter
  3. Conservation of matter
  4. Chemical composition of matter

 

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

  1. We occasionally fall sick
  2. Doctors tell us so in the hospital
  3. We eat balanced diet
  4. 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

  1. Yellow
  2. Blue
  3. Irregular
  4. Quiet

 

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

  1. Corrosive symbol
  2. Toxic symbol
  3. Carcinogenic symbol
  4. Harmful symbol

 

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

  1. Assorted bondages
  2. Amoxyl tablets
  3. Pain killer
  4. Antiseptic

 

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

  1. Statement of a problem
  2. Formation of hypothesis
  3. Observation and data collection
  4. Data analysis and interpretation

 

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

  1. Dangerous and delicate reaction
  2. Chemical changes
  3. Physical changes
  4. Easily reversible reaction

 

(viii)       Matter exist in three stages these are

  1. Solid, vapour and gas
  2. Heat, light and sound
  3. Liquid, solid and water
  4. Liquid, solid and gas

 

(ix)            Pick the odd man out from the following

  1. Destructive distillation of coal
  2. Fractional distillation of crude oil
  3. Alcohol production by distillation
  4. Condensation of steam to get water

 

(x)              An example of a physical change is when

  1. Firewood burns to form ashes
  2. Iron nail from rust
  3. Hydrogen peroxide decomposes to form water and oxygen
  4. Steam change to clouds and then to rain

 

 

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  1. 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

  1. Is the process where liquid changes into gaseous
  2. Is the phenomenon where liquid change into chemical
  3. Are mixtures which do not mix accordingly
  4. Sediments deposit at the base
  5. Carbon fourteen
  6. Carbondioxide
  7. Sugar, ethanol and water
  8. Salt, ammonium chloride and air
  9. Is the substance which cannot be split up into any simpler substance by any chemical means
  10. Is the process of splitting up the micro-substance into macro-substance
  11. Wire gauze
  12. Tripod stand
  13. Mercury
  14. Sodium
  15. Flammable
  16. Oxidizing agent
  17. Oil and water
  18. Sugar solution
  19. Zc
  20. Zn

 

 

 

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SECTION B. (54 MARKS)

 

  1. (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

 

  1. (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

 

  1. 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 __________________

 

  1. (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 _______________________________________________________

 

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

Methylated spirit

Sodium cyanide

Sulphuric acid concentrated

 

 

 

 

 

  1.  Write “T” for true statement and “F” for force statement
  1. All heterogeneous mixtures are suspensions  __________________
  2. All suspensions are heterogeneous mixtures  ________________
  3. Smoke in air is a suspension _______________
  4. One example of emulsion is colour paint  _____________
  5. An example of an alloy is brass _____________
  6.  Air is a compound _____________

 

 

  1. Write English names of the following symbols:

(i)                Br __________________________________

(ii)              Hg __________________________________

(iii)            H ____________________________________

(iv)            Na ______________________________________

(v)              K __________________________________________

(vi)            I ______________________________________________

 

 

 

  1.  (a) Mention three examples of physical change of matter

(i)                _______________________________________

(ii)              _______________________________________

(iii)            _______________________________________

 

(b) Mention three examples of chemical change of matter

(i) ____________________________________________________

(ii) _____________________________________________________

(iii) _____________________________________________________

 

 

  1. (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)

  1. (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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