Sample WAEC-style Practice Questions (Original Content)

WAEC Style

Question 1

Which of the following elements has the electronic configuration 1s2 2s2 2p6 3s2 3p3?

Question 2

The isotope of Hydrogen that contains no neutrons in its nucleus is:

Question 3

Which of the following forces is responsible for the low boiling points of noble gases?

Question 4

The geometric shape of the Carbon (IV) oxide molecule is:

Question 5

As we move from left to right across a period in the periodic table, the atomic radius:

Question 6

Which of the following is most suitable for separating the components of ink?

Question 7

A sample of a substance is considered pure if it has a:

Question 8

The equation PV = nRT represents the:

Question 9

Compare the rates of diffusion of Hydrogen (H2) and Oxygen (O2). (H=1, O=16)

Question 10

Ammonium chloride can be separated from Sodium chloride by:

Question 11

Which of the following is an example of a chemical change?

Question 12

The maximum number of electrons that can occupy the 3p subshell is:

Question 13

Which of the following is a physical property of Chlorine gas?

Question 14

What is the oxidation number of Nitrogen in the NH4+ ion?

Question 15

The standard molar volume of a gas is measured at 0 degrees Celsius and ______ pressure.

Question 16

The solubility of KNO3 in water ______ as the temperature increases.

Question 17

Which of the following is a neutral oxide?

Question 18

A basic solution has a pH value:

Question 19

The term "water of crystallization" refers to water that is:

Question 20

The process of adding Chlorine to water during treatment is to:

Question 21

Which of the following is the most reactive halogen?

Question 22

The energy required to remove the most loosely bound electron from a gaseous atom is:

Question 23

Which of the following elements is a transition metal?

Question 24

During the electrolysis of Copper (II) tetraoxosulfate (VI) using copper electrodes, the mass of the anode:

Question 25

A catalyst increases the rate of reaction by:

Question 26

The functional group of the Alkanoic acid series is:

Question 27

Which of the following is an unsaturated hydrocarbon?

Question 28

The process by which large molecules are broken down into smaller ones by heat is:

Question 29

Which gas is used in the manufacture of margarine from vegetable oils?

Question 30

What is the IUPAC name of the compound CH3CH(CH3)CH2CH3?

Question 31

Which of the following is a synthetic polymer?

Question 32

The reaction between an organic acid and an alcohol to produce an ester is called:

Question 33

Which of the following is a use of Carbon (IV) oxide?

Question 34

The temporary hardness of water is caused by the presence of:

Question 35

The method used to extract Aluminum from Bauxite is:

Question 36

Which of the following gases is produced when coal burns in a limited supply of air?

Question 37

The percentage by mass of Carbon in Ethanol (C2H5OH) is: (C=12, H=1, O=16)

Question 38

Which of the following is a property of graphite?

Question 39

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

Question 40

Hydrocarbons that undergo only substitution reactions are:

Question 41

Which of the following ions is discharged first at the cathode during the electrolysis of brine?

Question 42

The major air pollutant responsible for acid rain is:

Question 43

Which of the following is the chief ore of Tin?

Question 44

What color change is observed when SO2 is bubbled through acidified K2Cr2O7?

Question 45

The noble gas used in filling deep-sea diving tanks along with Oxygen is:

Question 46

A coordinate covalent bond is found in:

Question 47

Which of the following is an allotrope of Oxygen?

Question 48

The most abundant element in the universe is:

Question 49

Ethanoic acid reacts with Sodium trioxocarbonate (IV) to release:

Question 50

The ratio of the mass of a volume of gas to the mass of an equal volume of Hydrogen is its:

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