JAMB Past Questions and Answers - Page 1714

8,566.

Which of the following is used to hasten the ripening of fruit?

A.

Ethene

B.

Ethanol

C.

Ethyne

D.

Ethane

Correct answer is A

No explanation has been provided for this answer.

8,567.

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

8,568.

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.

8,569.

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.

8,570.

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