1. This paper consists of three sections A, B and C.

2. Answer all questions in spaces provided for each question.

3. Write your examination number on the top right hand corner of every page.

4. All writing must be done in “black or blue pen” except for the diagrams which must be in pencil.

5. Cellphones and calculators are not allowed in the examination room.

6. The following constants may be used:

Atomic masses: H = 1, C = 12, O = 16, and Na = 23.


1. Write down the letter of the correct answer against each question.

(i)The fixed volume (20 cm3) of distilled water in the laboratory can be measured by using:

  1. Beaker 
  2. Burette
  3. Pipette
  4. Small measuring cylinder
Choose Answer :

(ii) Domestic utensils made of iron undergo rusting when exposed to:

  1. Air and fire 
  2. Air and oil
  3. Air and water
  4. Air and soil
Choose Answer :

(iii) The source of energy which when used can be made to be put into use again is known as:

  1. Fuel 
  2. Non-renewable energy
  3. Renewable energy
  4. Solar energy
Choose Answer :

(iv) A student who gets burnt accidentally in the chemistry laboratory would be given one of the following as first aid:

  1. Antibiotic solution 
  2. Nitric acid
  3. Petroleum jelly
  4. Potassium permanganate
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(v) The chloride ion (Cl-) differs from chlorine atom because chloride ion has:

  1. Less electrons 
  2. Less protons
  3. More electrons 
  4. More protons
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(vi) The percentage by mass of nitrogen in (NH4)2CO3 is:

  1. 28.0 
  2. 29.1
  3. 37.5 
  4. 96.0
Choose Answer :

(vii) The elements which are found in group VIII of the periodic table are known as:

  1. Metals
  2. Noble gases
  3. Non-metals
  4. Right elements
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(viii) Isotopes are atoms which have:

  1. Different mass number
  2. Different number of electrons
  3. Different number of protons
  4. The same number of neutrons
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(ix) The process used to separate a mixture of salt and water is:

  1. Evaporation
  2. Filtration
  3. Simple distillation 
  4. Sublimation
Choose Answer :

(x) Which of the following chemical species have the same number of electrons?

  1. Cl, Be, He and O2-
  2. K+ , Ca2+ , Cl- and Ar
  3. Na+ , Mg2+ , C13 and Ar
  4. O2- , F- , S2- and Cl-
Choose Answer :


2. You are provided with two lists, A and B. Choose a word(s) from list B which matches the statement or phrase in list A.

List A List B

(i) . . . . . . . Covalent bond

(ii) . . . . . . . Combining capacity of an element

(iii) . . . . . . . Destructive distillation of wood

(iv) . . . . . . Increases from left to right across the period in the periodic table 

(v) . . . . . . Liquid metal

(vi) . . . . . "Pop sound"

(vii) . . . . . . Re-lights a glowing splint

(viii) . . . . . Turns lime water milky

(ix) . . . . . The product of heating iron and sulphur

(x)  . . . . . . The study of composition of matter and its behaviour

  1. Carbon dioxide
  2. Carbon monoxide
  3. Charcoal
  4. Chalk
  5. Chemical change
  6. Chemical composition
  7. Chemistry
  8. Electron sharing
  9. Electron transfer
  10. Electro-negativity
  11. Hydride
  12. Mercury
  13. Oxygen
  14. Valency
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3. (a) For each of the following classes of fire, state the burning material(s)

(i) Class A fire

(ii) Class B fire

(iii) Class C fire

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(b) Fire can be prevented by (Mention four)

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4. Use the following information about elements F, G, L, M and J shown in the Table below to answer the questions that follow:

Element Atomic number Atomic mass
F 8 16
G 9 19
L 11 23
M 6 12
J 18 40

(a) (i) Write down the electrons configuration of elements F, G, L and J.

(ii) How many neutrons are present in element G?

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(b) Write the chemical symbols for the following elements:

(i) Silver

(ii) Lead

(iii) Tin

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5. (a) State the meaning of apparatus.

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(b) Draw and state one function for each of the following laboratory apparatus:

Apparatus Diagram Function



Measuring cylinder


Test tube

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6. Oxygen is obtained by heating a metal chlorate in the presence of a catalyst.

(a) Write down the name of the:

(i) Metal chlorate used

(ii) The product formed other than oxygen

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(b) Write the:

(i) Formula and the IUPAC name of the catalyst used. 

(ii) Word equation for this reaction.

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(c) Draw a large and well labelled diagram for this laboratory preparation of oxygen.

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7. (a) Define the term "chemical formula".

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(b) Write down the chemical formula of the following compounds:

(i) Sodium carbonate ten water

(ii) Calcium hydroxide

(iii) Sulphuric acid

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(c) Give the IUPAC names for each of the following compounds: 

(i) CU2O

(ii) Na2SO4

(iii) NH4NO3

(iv) Fe2O3 

(v) H2O

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8. (a) What is air?

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(b) Mention the composition of air with their percentage composition:

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(c) Give four reasons why air is a mixture.

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9. Study the following diagram carefully and then answer the questions that follow:

(a) What is the name given to the arrangement of electrons around the nucleus?

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(b) What is the name of the layers in which the electrons are arranged?

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(c) If each layer can hold a maximum number of electrons given by formula 2n2, what does "n" represent?

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(d) By using the formula presented in Cc) above, calculate the number of electrons in: 

(i) K - Layer

(ii) L - Layer

(iii) M - Layer

(iv) N - Layer

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10. (a) Give the method used to separate the following mixtures:

(i) Kerosene and water

(ii) Alcohol (ethanol) and water

(iii)Iron filings and sand

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(b) Water is a chemical compound. Give four reasons to support this fact.

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