Sample WAEC-style Practice Questions (Original Content)

WAEC Style

Question 1

Which of the following is a constituent of a mixture but not a compound?

Question 2

The electronic configuration of an atom is 2, 8, 7. How many valence electrons does it have?

Question 3

Which of the following elements belongs to the same group as Magnesium (Atomic number 12)?

Question 4

The type of bond formed between two atoms of Hydrogen to form H2 is:

Question 5

According to Dalton's atomic theory, atoms are:

Question 6

The state of matter with a fixed volume but no fixed shape is:

Question 7

What is the molar mass of H2O? (H=1, O=16)

Question 8

If the pressure of a gas is doubled at constant temperature, the volume will be:

Question 9

Which of the following is an example of a physical property?

Question 10

The formula for Carbon (II) oxide is:

Question 11

An acid that ionizes completely in water is described as a:

Question 12

The IUPAC name of CH3CH2OH is:

Question 13

Which of the following gases is used in the manufacture of ammonia?

Question 14

What is the oxidation number of Oxygen in most of its compounds?

Question 15

The indicator methyl orange turns ______ in acidic solutions.

Question 16

Which of the following subatomic particles has no charge?

Question 17

What is the general formula for Alkanols?

Question 18

The temporary hardness of water can be removed by:

Question 19

Which of the following is a transition metal?

Question 20

The noble gas used to provide an inert atmosphere in light bulbs is:

Question 21

An element with atomic number 9 is a:

Question 22

Which type of bonding involves the "sea of electrons"?

Question 23

What color is the flame when Copper is heated?

Question 24

The process of converting vapor into liquid is called:

Question 25

The catalyst used in the manufacture of sulfuric acid by the Contact process is:

Question 26

What is the oxidation number of sulfur in H2S?

Question 27

Compounds with the same molecular formula but different structural arrangements are:

Question 28

Which of the following is a property of an endothermic reaction?

Question 29

The gas that turns lime water milky is:

Question 30

Which of the following metals can be found free in nature?

Question 31

The primary reason for galvanizing iron is to prevent:

Question 32

What is the pH of a solution containing 0.001 mol/dm3 of HCl?

Question 33

A mixture of sand and salt can be separated by:

Question 34

Which of the following is a natural polymer?

Question 35

How many structural isomers does Butane (C4H10) have?

Question 36

The gas used in the vulcanization of rubber is:

Question 37

Which subatomic particle orbits the nucleus?

Question 38

The functional group of Alkanoates (Esters) is:

Question 39

The solubility of a gas in water generally ______ as temperature increases.

Question 40

Which of the following elements is a liquid at room temperature?

Question 41

In the reaction: Zn + CuSO4 -> ZnSO4 + Cu, Zinc is acting as a/an:

Question 42

Which of the following gases has a rotten egg smell?

Question 43

The bond formed when an atom with a lone pair of electrons shares it with an electron-deficient atom is:

Question 44

What is the product formed at the cathode during the electrolysis of molten NaCl?

Question 45

Which of the following is an amphoteric oxide?

Question 46

The major constituent of the gas used for domestic cooking (LPG) is:

Question 47

The term used to describe the heat content of a system is:

Question 48

Which of the following is an example of a synthetic fiber?

Question 49

Water gas is a mixture of:

Question 50

Which of the following is the chief ore of lead?

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