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 581· Organic compounds· JAMB
The conversion of ethene into polythene is an example of
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Answer: D. addition polymerisation
Explanation and discussion
Question 582· Organic compounds· JAMB
The general formula of alkanes is:
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Answer: C. CₙH₂ₙ₊₂
Explanation and discussion
Question 583· Organic compounds· WAEC
Which of these is used to test for unsaturation in a hydrocarbon?
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Answer: B. bromine water
Explanation and discussion
Question 584· Organic compounds· JAMB
Ethanol warmed with excess acidified potassium heptaoxodichromate(VI) is oxidised to
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Answer: C. ethanoic acid
Explanation and discussion
Question 585· Organic compounds· JAMB
The functional group of the alkenes is
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Answer: A. the carbon–carbon double bond
Explanation and discussion
Question 586· Organic compounds· WAEC
The general formula of the alkanes is
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Answer: B. CₙH₂ₙ₊₂
Explanation and discussion
Question 587· Organic compounds· JAMB
Ethyne (acetylene) is used in
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Answer: C. oxy-acetylene welding
Explanation and discussion
Question 588· Organic compounds· WAEC
The next member of the alkane series after propane is
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Answer: C. butane
Explanation and discussion
Question 589· Organic compounds· WAEC
Saponification is the
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Answer: C. alkaline hydrolysis of fats to make soap
Explanation and discussion
Question 590· Organic compounds· WAEC
How many structural isomers has butane, C₄H₁₀?
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Answer: D. 2
Explanation and discussion
Question 591· Organic compounds· JAMB
The homologous series with the general formula CₙH₂ₙ₋₂ is the
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Answer: B. alkynes
Explanation and discussion
Question 592· Organic compounds· WAEC
Which of the following is produced by the fermentation of glucose?
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Answer: D. Ethanol
Explanation and discussion
Question 593· Organic compounds· WAEC
Isomers have the same
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Answer: D. molecular formula but different structures
Explanation and discussion
Question 594· Organic compounds· JAMB
Nylon is formed by
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Answer: D. condensation polymerisation
Explanation and discussion
Question 595· Organic compounds· JAMB
Which of the following polymers is made by condensation polymerisation?
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Answer: B. nylon
Explanation and discussion
Question 596· Organic compounds· WAEC
Alkenes decolourise bromine water because they
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Answer: A. undergo addition reactions
Explanation and discussion
Question 597· Organic compounds· JAMB
The IUPAC name of CH₃CH₂CH₂OH is
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Answer: D. propan-1-ol
Explanation and discussion
Question 598· Organic compounds· WAEC
Cracking of long-chain hydrocarbons produces
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Answer: B. shorter alkanes and alkenes
Explanation and discussion
Question 599· Organic compounds· WAEC
The IUPAC name of CH₃CH₂OH is
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Answer: A. ethanol
Explanation and discussion
Question 600· Organic compounds· JAMB
When sodium is added to ethanol, the gas given off is
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Answer: A. hydrogen
Explanation and discussion

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JAMB and WAEC Chemistry questions

The conversion of ethene into polythene is an example of

The general formula of alkanes is:

Which of these is used to test for unsaturation in a hydrocarbon?

Ethanol warmed with excess acidified potassium heptaoxodichromate(VI) is oxidised to

The functional group of the alkenes is

The general formula of the alkanes is

Ethyne (acetylene) is used in

The next member of the alkane series after propane is

Saponification is the

How many structural isomers has butane, C₄H₁₀?

The homologous series with the general formula CₙH₂ₙ₋₂ is the

Which of the following is produced by the fermentation of glucose?

Isomers have the same

Nylon is formed by

Which of the following polymers is made by condensation polymerisation?

Alkenes decolourise bromine water because they

The IUPAC name of CH₃CH₂CH₂OH is

Cracking of long-chain hydrocarbons produces

The IUPAC name of CH₃CH₂OH is

When sodium is added to ethanol, the gas given off is