Jamb Chemistry 2006 Past Questions and Answers

Question 11:

• JAMB 2006

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

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

Question 12:

• JAMB 2006

The sulphide which is insoluble in dilute hydrochloric acid is

A. FeS
B. CuS
C. ZnS
D. Na₂S

Question 13:

• JAMB 2006

Which of the following typically represents a photochemical reaction?

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

Question 14:

• JAMB 2006

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

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

Question 15:

• JAMB 2006

Nigerian crude oil is described as light crude because of its

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