Question 811:

• JAMB 1993

Catalytic hydrogenation of benzene produces?

A. An aromatic hydrocarbon
B. Margarine
C. Cyclohexane
D. D.D.T

Question 812:

• JAMB 1993

Which of the following represents saponification?

A. Reaction of carboxylic acids with sodium hydroxide
B. Reaction of alkanoates with acid
C. Reaction of alkanoates with alcohols
D. Reaction of alkanoates with sodium hydroxide

Question 813:

• JAMB 1993

The confirmatory test for alkanoic acids in organic qualitative analysis is the?

A. Turning of wet blue litmus paper red
B. Reaction with alkanols to form esters
C. Reaction with sodium hydroxide to form salt and water
D. Reaction with aqueous Na₂COsp₃ to liberate a gas which turns lime water milky

Question 814:

• JAMB 1993

A gas that will turn orange potassium heptaoxodichromate (lV) solution to clear green is?

A. Sulphur (ii) oxide
B. Hydrogen sulphide
C. Sulphide (lV) oxide
D. Hydrogen chloride

Question 815:

• JAMB 1993

Which of the curves above represents the behaviour of 1 mole of an ideal gas?

A. L
B. Ll
C. Lll
D. LV