JAMB Chemistry Past Questions & Answers - Page 324

1,616.

Benzene reacts with hydrogen in the presence of nickel catalyst at 180ºC to give?

A.

xylene

B.

toluene

C.

cyclopentane

D.

cyclohexane

Correct answer is D

Cyclohexane is formed when Benzene (vapor) undergoes addition reaction with hydrogen in the presence of nickel catalyst at 180°C

1,617.

Which of the following organic compounds is very soluble in water?

A.

CH3COOH

B.

C2H2

C.

C2H4

D.

CH3COOC2H5

Correct answer is A

Ethanoic acid ( CH\(_3\)COOH ) is the only organic compound listed here that is (very) soluble in water.

1,618.

Which of the following is used as fuel in miners' lamp?

A.

Ethanal

B.

Ethyne

C.

Ethene

D.

Ethane

Correct answer is B

Ethyne is a sometimes used a fuel in miners'lamps.

1,619.

The IUPAC nomenclature of the compound above is?

A.

4 - ethyloctane

B.

5 - ethyloctane

C.

5 - propylheptane

D.

3 - propylheptane

Correct answer is A

Adhering to the basic naming rules, this compound is identified as  4 - ethyloctane

1,620.

The residual solids from the fractional distillation of petroleum are used as?

A.

coatings of pipes

B.

raw materials for the cracking process

C.

fuel for the driving tractors

D.

fuel for jet engines

Correct answer is A

Other residues (apart from bitumen) are used as fuel, pipe coating, etc