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 561· Organic compounds· JAMB
The reaction between an alcohol and a carboxylic acid produces:
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Answer: D. an ester and water
Explanation and discussion
Question 562· Organic compounds· WAEC
The functional group in alkanoic acids is
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Answer: D. -COOH
Explanation and discussion
Question 563· Organic compounds· JAMB
Benzene mainly undergoes
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Answer: B. substitution reactions
Explanation and discussion
Question 564· Organic compounds· WAEC
Name the compound CH₃CH₂CH₂OH by the IUPAC system.
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Answer: C. propan-1-ol
Explanation and discussion
Question 565· Organic compounds· JAMB
The hydration of ethene produces
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Answer: B. ethanol
Explanation and discussion
Question 566· Organic compounds· JAMB
A hydrocarbon contains 85.7% carbon and 14.3% hydrogen by mass. Find its empirical formula. (C = 12, H = 1)
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Answer: C. CH₂
Explanation and discussion
Question 567· Organic compounds· JAMB
The ester formed when ethanoic acid reacts with ethanol is
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Answer: C. ethyl ethanoate
Explanation and discussion
Question 568· Organic compounds· WAEC
Ethanoic acid reacts with ethanol in the presence of concentrated H₂SO₄ to form
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Answer: A. ethyl ethanoate
Explanation and discussion
Question 569· Organic compounds· WAEC
Ethanol reacts with ethanoic acid in the presence of concentrated tetraoxosulphate(VI) acid to form
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Answer: A. ethyl ethanoate
Explanation and discussion
Question 570· Organic compounds· JAMB
But-2-ene shows geometrical (cis-trans) isomerism because
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Answer: B. rotation about the C=C double bond is restricted
Explanation and discussion
Question 571· Organic compounds· JAMB
The molecular formula of benzene is
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Answer: C. C₆H₆
Explanation and discussion
Question 572· Organic compounds· JAMB
In the laboratory, methane is prepared by heating sodium ethanoate with
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Answer: B. soda lime
Explanation and discussion
Question 573· Organic compounds· WAEC
Polythene is made by
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Answer: D. addition polymerisation of ethene
Explanation and discussion
Question 574· Organic compounds· JAMB
Structural isomers have
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Answer: C. the same molecular formula but different structural formulae
Explanation and discussion
Question 575· Organic compounds· JAMB
The reaction between an alkanoic acid and an alkanol to form an ester is catalysed by
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Answer: C. concentrated tetraoxosulphate(VI) acid
Explanation and discussion
Question 576· Organic compounds· WAEC
The functional group of alkanoic acids is
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Answer: D. –COOH
Explanation and discussion
Question 577· Organic compounds· JAMB
The IUPAC name of CH₃CH(CH₃)CH₃ is
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Answer: D. 2-methylpropane
Explanation and discussion
Question 578· Organic compounds· JAMB
The monomer of polyvinyl chloride (PVC) is
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Answer: B. chloroethene
Explanation and discussion
Question 579· Organic compounds· JAMB
In the laboratory, ethyne is prepared by adding water to
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Answer: D. calcium carbide
Explanation and discussion
Question 580· Organic compounds· WAEC
The reaction between an alkanoic acid and an alkanol produces
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Answer: D. an ester and water
Explanation and discussion

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JAMB and WAEC Chemistry questions

The reaction between an alcohol and a carboxylic acid produces:

The functional group in alkanoic acids is

Benzene mainly undergoes

Name the compound CH₃CH₂CH₂OH by the IUPAC system.

The hydration of ethene produces

A hydrocarbon contains 85.7% carbon and 14.3% hydrogen by mass. Find its empirical formula. (C = 12, H = 1)

The ester formed when ethanoic acid reacts with ethanol is

Ethanoic acid reacts with ethanol in the presence of concentrated H₂SO₄ to form

Ethanol reacts with ethanoic acid in the presence of concentrated tetraoxosulphate(VI) acid to form

But-2-ene shows geometrical (cis-trans) isomerism because

The molecular formula of benzene is

In the laboratory, methane is prepared by heating sodium ethanoate with

Polythene is made by

Structural isomers have

The reaction between an alkanoic acid and an alkanol to form an ester is catalysed by

The functional group of alkanoic acids is

The IUPAC name of CH₃CH(CH₃)CH₃ is

The monomer of polyvinyl chloride (PVC) is

In the laboratory, ethyne is prepared by adding water to

The reaction between an alkanoic acid and an alkanol produces