JAMB Chemistry Past Questions & Answers - Page 135

671.

Which of the following compounds is a secondary alkanol?

A.

A

B.

B

C.

C

D.

D

Correct answer is A

Alkanols with two alkyl groups attached to the carbon atom carrying the hydroxyl group is called secondary alkanol

672.

In the experiment above. Z can be

A.

a solution of sodium dioxonitrate (lll) and ammonium chloride

B.

a solution of lead trioxnitrate (V)

C.

a solution of sodium trioxonitrate (V) and ammonium chloride

D.

concentrated tetraoxosulphate (VI) acid and sodium trioxonitrate (V)

Correct answer is C

Nitrogen(I) oxide(laughing gas) can be prepared in the laboratory by the action of heat on a mixture of sodium trioxonitrate (V) and ammonium chloride, this colourless gas is collected over water.

673.

The appropriate test paper to use in the above experiment is moist

A.

litmus paper

B.

potassium heptaoxodichromate (IV) paper

C.

lead (ll) trioxonitrate (V) paper

D.

universal indicator paper

Correct answer is C

No explanation has been provided for this answer.

675.

50 cm3 of sulphur (lV) oxide, 800 cm3 of carbon (IV) oxide will respectively saturate 1.0cm3 of water at 15oC. Which of the following is suitable for demonstrating the fountain experiment?

A.

Sulphur (IV) oxide and hydrogen chloride.

B.

Carbon (IV) oxide and ammonia

C.

Ammonia and hydrogen chloride

D.

Carbon (IV) oxide and Sulphur (IV) oxide

Correct answer is C

No explanation has been provided for this answer.