WAEC Past Questions and Answers - Page 1616

8,076.

What is the function of H2SO4 in the following reaction? C12
H22O11 conc. H24 12C + 11H2O

A.

Oxidizing agent

B.

Strong acid

C.

Dehydrating agent

D.

Catalyst

Correct answer is C

No explanation has been provided for this answer.

8,077.

Which of the following polymers contains nitrogen?

A.

Nylon

B.

Polyvinyl chloride

C.

Polyethene

D.

Cellulose

Correct answer is A

No explanation has been provided for this answer.

8,078.

One of the products of combustion of pentane in excess air is

A.

pentanol

B.

pentene

C.

nitrogen (ll) oxide

D.

carbon (IV) oxide

Correct answer is D

No explanation has been provided for this answer.

8,079.

Benzene produces more soot than ethene on burning because benzene

A.

has a higher molar mass

B.

has a higher degree off unsaturation

C.

undergoes substitution and addition reaactions

D.

is a liquid at room temperature

Correct answer is A

No explanation has been provided for this answer.

8,080.

Hydrogenation of butene yields

A.

butyne

B.

butane

C.

pentence

D.

butanol

Correct answer is B

No explanation has been provided for this answer.