JAMB and WAEC Chemistry questions

800 questions with answers and explanations. Tap an option to check yourself.

All topics Acids, bases and salts · 58 Air · 37 Atomic structure and bonding · 59 Chemical combination · 58 Chemical equilibrium · 37 Chemistry and industry · 35 Electrolysis · 41 Energy changes · 38 Environmental pollution · 32 Kinetic theory of matter and gas laws · 45 Metals and their compounds · 47 Non-metals and their compounds · 45 Organic compounds · 72 Oxidation and reduction · 41 Rates of chemical reaction · 38 Separation of mixtures and purification · 42 Solubility · 36 Water · 39

Question 361· Energy changes· JAMB
The combustion of 1 mol of methane releases 890 kJ. How much heat is released when 4 g of methane burns? (C = 12, H = 1)
Explanation and discussion
Question 362· Energy changes· WAEC
For C + O₂ → CO₂, ΔH = −394 kJ/mol. How much heat is released when 6 g of carbon burns completely? [C = 12]
Explanation and discussion
Question 363· Energy changes· JAMB
An exothermic reaction is one in which:
Explanation and discussion
Question 364· Environmental pollution· JAMB
Photochemical smog forms when sunlight acts on
Explanation and discussion
Question 365· Environmental pollution· JAMB
Smog is a mixture of
Explanation and discussion
Question 366· Environmental pollution· WAEC
Gas flaring at oil fields in the Niger Delta adds mainly which greenhouse gas to the atmosphere?
Explanation and discussion
Question 367· Environmental pollution· JAMB
Which gas in car exhaust fumes combines with haemoglobin and reduces the blood's ability to carry oxygen?
Explanation and discussion
Question 368· Environmental pollution· JAMB
Gas flaring in the Niger Delta releases large amounts of
Explanation and discussion
Question 369· Environmental pollution· WAEC
Carbon monoxide is poisonous because it
Explanation and discussion
Question 370· Environmental pollution· WAEC
Domestic generators should not be run indoors because they release
Explanation and discussion
Question 371· Environmental pollution· JAMB
Which gas is mainly responsible for acid rain?
Explanation and discussion
Question 372· Environmental pollution· WAEC
Gas flaring in the Niger Delta releases
Explanation and discussion
Question 373· Environmental pollution· WAEC
The main cause of water pollution in many Nigerian rivers is
Explanation and discussion
Question 374· Environmental pollution· WAEC
Chlorofluorocarbons (CFCs) damage which layer of the upper atmosphere?
Explanation and discussion
Question 375· Environmental pollution· WAEC
Carbon(II) oxide is poisonous because it
Explanation and discussion
Question 376· Environmental pollution· JAMB
Which of the following wastes is biodegradable?
Explanation and discussion
Question 377· Environmental pollution· JAMB
Depletion of the ozone layer is mainly caused by
Explanation and discussion
Question 378· Environmental pollution· WAEC
Which gas is mainly responsible for the greenhouse effect?
Explanation and discussion
Question 379· Environmental pollution· WAEC
Acid rain damages buildings made of limestone because the acid
Explanation and discussion
Question 380· Environmental pollution· JAMB
Chlorofluorocarbons (CFCs) were widely used in
Explanation and discussion

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JAMB and WAEC Chemistry questions

The combustion of 1 mol of methane releases 890 kJ. How much heat is released when 4 g of methane burns? (C = 12, H = 1)

For C + O₂ → CO₂, ΔH = −394 kJ/mol. How much heat is released when 6 g of carbon burns completely? [C = 12]

An exothermic reaction is one in which:

Photochemical smog forms when sunlight acts on

Smog is a mixture of

Gas flaring at oil fields in the Niger Delta adds mainly which greenhouse gas to the atmosphere?

Which gas in car exhaust fumes combines with haemoglobin and reduces the blood's ability to carry oxygen?

Gas flaring in the Niger Delta releases large amounts of

Carbon monoxide is poisonous because it

Domestic generators should not be run indoors because they release

Which gas is mainly responsible for acid rain?

Gas flaring in the Niger Delta releases

The main cause of water pollution in many Nigerian rivers is

Chlorofluorocarbons (CFCs) damage which layer of the upper atmosphere?

Carbon(II) oxide is poisonous because it

Which of the following wastes is biodegradable?

Depletion of the ozone layer is mainly caused by

Which gas is mainly responsible for the greenhouse effect?

Acid rain damages buildings made of limestone because the acid

Chlorofluorocarbons (CFCs) were widely used in