JAMB Chemistry Past Questions & Answers - Page 333

1,661.

The final products of the reaction between methane and chlorine in the presence of ultraviolet light are hydrogen chloride and?

A.

tricloromethane

B.

dichloromethane

C.

tetrachloromethane

D.

chloromethane

Correct answer is C

Carbon tetrachloride ( IUPAC: Tetrachloromethane) CCl\(_4\), is the final product obtained in this substitution reaction.

1,662.

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.

1,663.

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

1,664.

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.

1,665.

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.