JAMB Past Questions and Answers - Page 1564

7,816.

Synthetic rubber is made by polymerization of?

A.

2 methyl buta - 1, 3 - diene

B.

2 methyl buta - 1, 2 - diene

C.

2 methyl but -1-ene

D.

2 methyl but-2-ene

Correct answer is A

No explanation has been provided for this answer.

7,817.

Local black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the?

A.

acid

B.

ester of allanoic acid

C.

alkali

D.

alkanol

Correct answer is C

No explanation has been provided for this answer.

7,818.

The most volatile fraction obtained from fractional distillation of crude petroleum contains?

A.

butane , propane and kerosene

B.

butane , propane and petrol

C.

ethane, methane and benzene

D.

methane, ethane and propane

Correct answer is D

No explanation has been provided for this answer.

7,819.

Ethanol reacts with aqueous sodium mono-oxoio date (l) to give a bright yellow solid with a characteristic smell. The product is?

A.

trichloromethane

B.

triodomethane

C.

iodoethane

D.

ethanal

Correct answer is B

No explanation has been provided for this answer.

7,820.

The efficiency of petrol as a fuel in high-compression internal combustion engines improves with an increase in the amount of?

A.

branched chain alkanes

B.

straight chain alkanes

C.

cycloalkanes

D.

halogenated hydrocarbons

Correct answer is A

No explanation has been provided for this answer.