Sample WAEC-style Practice Questions (Original Content)

WAEC Style

Question 1

Which of the following elements has the electronic configuration 2, 8, 8, 2?

Question 2

The periodic table is arranged in order of increasing:

Question 3

Which of the following is a redox reaction?

Question 4

The type of bond in which electrons are shared between atoms of the same electronegativity is:

Question 5

What volume will 0.5 moles of a gas occupy at S.T.P.?

Question 6

Which of the following separation methods is based on the difference in boiling points?

Question 7

The atomic number of an element is the number of ______ in its nucleus.

Question 8

What is the oxidation number of Sulfur in SO2?

Question 9

Which of the following is a greenhouse gas?

Question 10

The gas produced when dilute HCl reacts with Magnesium metal is:

Question 11

A property of a pure substance that remains constant regardless of the sample size is:

Question 12

The process of soap making is known as:

Question 13

Which of the following allotropes of Carbon is the hardest known natural substance?

Question 14

The number of atoms in one mole of any substance is known as:

Question 15

Which of the following indicators is colorless in acidic solution?

Question 16

What is the functional group of Alkanols?

Question 17

Which gas law relates volume and temperature at constant pressure?

Question 18

Hard water contains dissolved ions of:

Question 19

The enzyme that breaks down starch into maltose is:

Question 20

The noble gas used in filling advertising neon signs is:

Question 21

Which of the following is a base?

Question 22

The heat change when one mole of a substance is formed from its elements is called enthalpy of:

Question 23

What is the molar mass of NaOH? (Na=23, O=16, H=1)

Question 24

Which of the following gases turns moist blue litmus paper red and then bleaches it?

Question 25

Elements in Group 1 of the periodic table are called:

Question 26

Which of the following is an electrolyte?

Question 27

What type of reaction is: C2H4 + H2 -> C2H6?

Question 28

The Brownian motion provides evidence for the ______ nature of matter.

Question 29

Which of the following elements is a halogen?

Question 30

The oxidation state of an element in its free uncombined state is:

Question 31

Temporary hardness in water is caused by the presence of:

Question 32

The IUPAC name for CH3COOH is:

Question 33

Anhydrous copper (II) tetraoxosulfate (VI) is used as a test for water because it turns from white to ______ in the presence of water.

Question 34

What is the percentage of Oxygen in CO2? (C=12, O=16)

Question 35

Which of the following is a physical change?

Question 36

The monomer of polyethene is:

Question 37

The mass number of an element is the sum of ______ and ______.

Question 38

Which of the following is a neutral oxide?

Question 39

A catalyst increases the rate of reaction by lowering the:

Question 40

Which metal is extracted using the blast furnace?

Question 41

The bond formed when one atom provides both shared electrons is a ______ bond.

Question 42

Which of the following is an alkaline gas?

Question 43

The process of converting a liquid to a vapor by heating and then condensing the vapor back to a liquid is:

Question 44

A gas that is lighter than air and used in filling balloons is:

Question 45

What is the pH of a neutral solution at 25 degrees Celsius?

Question 46

The most abundant element in the Earth's crust is:

Question 47

Which of the following is used in the manufacture of margarine?

Question 48

The standard unit of Pressure is:

Question 49

What is the general formula for Alkenes?

Question 50

The molar volume of any gas at S.T.P. is approximately ______ dm3.

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