WAEC (WASSCE) • Chemistry

Chemistry past questions

Explore WAEC (WASSCE) questions organised by topic. Refine the filters to focus on a specific year or question type.

65 questions Topic: All topics Format: Objective & Theory

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WAEC (WASSCE) Past Questions

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#1

Question 1

Chemistry

WAEC 2026 Objective
Which of the following statements correctly distinguishes between acids and bases ?
A
Acids turn red litmus blue while bases turn blue litmus red
B
Acids are proton donors while bases are proton acceptors
C
Acids have a pH greater than 7 while bases have a pH less than 7
D
Both acids and bases produce hydrogen ions in solution
#2

Question 2

Chemistry

WAEC 2026 Objective
Which of the following pairs correctly represents a strong acid and a weak acid respectively ?
A
HCl and CH₃COOH
B
H₂SO₄ and HNO₃
C
H₂CO₃ and H₂SO₄
D
CH₃COOH and H₂CO₃
#3

Question 3

Chemistry

WAEC 2026 Objective
Which of the following bases is soluble in water and hence referred to as an alkali ?
A
Cu(OH)₂
B
Fe(OH)₃
C
NaOH
D
Zn(OH)₂
#4

Question 4

Chemistry

WAEC 2025 Objective

Which of the following pairs of gases cannot be collected by downward delivery?

A

SO2 and NH3

B

CO and N2

C

Cl2 and H2S

D

SO2 and N2

#5

Question 5

Chemistry

WAEC 2025 Objective

Nickel is used in the hydrogenation of alkenes because it

A

increases the yield of the product.

B

lowers the activation energy of the reaction.

C

makes the reaction more exothermic.

D

prevents a reverse reaction from occurring.

#6

Question 6

Chemistry

WAEC 2025 Objective

Aluminium is extracted by

A

electrolysis of the purified ore.

B

froth flotation of the smelted ore.

C

reduction of the ore with coke in a furnace.

D

roasting the ore in excess supply of air.

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