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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 11:

In the industrial production of H₂ from natural gas the CO₂ produced along with the H₂ is removed by

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A Washing under pressure
B Drying over phosphorus (V) oxide
C Passing the mixture into lime water
D Using ammonical copper (I) chloride

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Question 12:

The sulphide which is insoluble in dilute hydrochloric acid is

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A FeS
B CuS
C ZnS
D Na₂S

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Question 13:

Which of the following typically represents a photochemical reaction?

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A Formation of water from hydrogen and oxygen molecules
B Conversion of dinitrogen (IV) oxide to nitrogen (IV) oxide
C Decomposition of calcium hydroxide to its oxide
D Conversion of silver halides to grey metallic silver

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Question 14:

The gas obtained as a product of anaerobic action on organic matter buried in the earth is

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A Ethene
B Methane
C Carbon (IV) oxide
D Nitrogen (IV) oxide

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Question 15:

Nigerian crude oil is described as light crude because of its

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A Low sulphur content
B High natural gas content
C High octane number
D Low aliphatic-hydrocarbon content

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