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 441· Metals and their compounds· WAEC
An alloy of copper and zinc is
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Answer: B. brass
Explanation and discussion
Question 442· Metals and their compounds· JAMB
Which metal is the best conductor of electricity?
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Answer: C. silver
Explanation and discussion
Question 443· Metals and their compounds· JAMB
When potassium is dropped into water, it
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Answer: D. reacts violently, forming potassium hydroxide and hydrogen
Explanation and discussion
Question 444· Metals and their compounds· WAEC
Which of these properties is typical of metals?
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Answer: D. they conduct electricity
Explanation and discussion
Question 445· Metals and their compounds· WAEC
Galvanised iron sheets used for roofing are coated with
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Answer: A. zinc
Explanation and discussion
Question 446· Metals and their compounds· WAEC
Limestone in the blast furnace removes
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Answer: C. silica impurities as slag
Explanation and discussion
Question 447· Metals and their compounds· JAMB
Which of the following shows the metals in order of decreasing reactivity?
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Answer: B. K, Na, Ca, Mg
Explanation and discussion
Question 448· Metals and their compounds· WAEC
Which of the following metals reacts most vigorously with cold water?
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Answer: D. Potassium
Explanation and discussion
Question 449· Metals and their compounds· JAMB
Iron pipes buried in the ground can be protected from rusting by attaching blocks of
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Answer: B. magnesium or zinc
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Question 450· Metals and their compounds· JAMB
Sodium is extracted industrially by
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Answer: B. electrolysis of molten sodium chloride
Explanation and discussion
Question 451· Metals and their compounds· JAMB
Steel is an alloy of iron and
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Answer: B. carbon
Explanation and discussion
Question 452· Metals and their compounds· WAEC
The metal that is stored under paraffin oil because it reacts with air and water is
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Answer: C. sodium
Explanation and discussion
Question 453· Metals and their compounds· JAMB
Aluminium does not corrode readily in air because
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Answer: B. it forms a thin protective layer of oxide
Explanation and discussion
Question 454· Metals and their compounds· JAMB
Which metal will displace copper from a solution of copper(II) tetraoxosulphate(VI)?
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Answer: B. zinc
Explanation and discussion
Question 455· Metals and their compounds· JAMB
Galvanising is the coating of iron with
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Answer: D. zinc
Explanation and discussion
Question 456· Metals and their compounds· WAEC
An alloy is
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Answer: D. a mixture of a metal with other elements
Explanation and discussion
Question 457· Metals and their compounds· JAMB
Compounds of transition metals are often
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Answer: A. coloured
Explanation and discussion
Question 458· Metals and their compounds· WAEC
The main ore of iron used in the blast furnace is
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Answer: B. haematite
Explanation and discussion
Question 459· Metals and their compounds· WAEC
Iron is extracted in the blast furnace using
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Answer: D. coke, limestone and iron ore
Explanation and discussion
Question 460· Metals and their compounds· WAEC
Which of these metals does not react with dilute hydrochloric acid?
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Answer: D. copper
Explanation and discussion

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JAMB and WAEC Chemistry questions

An alloy of copper and zinc is

Which metal is the best conductor of electricity?

When potassium is dropped into water, it

Which of these properties is typical of metals?

Galvanised iron sheets used for roofing are coated with

Limestone in the blast furnace removes

Which of the following shows the metals in order of decreasing reactivity?

Which of the following metals reacts most vigorously with cold water?

Iron pipes buried in the ground can be protected from rusting by attaching blocks of

Sodium is extracted industrially by

Steel is an alloy of iron and

The metal that is stored under paraffin oil because it reacts with air and water is

Aluminium does not corrode readily in air because

Which metal will displace copper from a solution of copper(II) tetraoxosulphate(VI)?

Galvanising is the coating of iron with

An alloy is

Compounds of transition metals are often

The main ore of iron used in the blast furnace is

Iron is extracted in the blast furnace using

Which of these metals does not react with dilute hydrochloric acid?