JAMB Chemistry Past Questions & Answers - Page 168

836.

When the kerosene fraction from petrol is heated at high temperature, a lower boiling liquid is obtained. This process is known as

A.

polymerization

B.

refining

C.

hydrogenation

D.

cracking

Correct answer is D

No explanation has been provided for this answer.

838.

The hybridization of the carbon atom in ethyne is

A.

sp 4

B.

sp 3

C.

sp2

D.

sp

E.

s

Correct answer is D

No explanation has been provided for this answer.

839.

In the Haber process for the manufacture of ammonia, finely divided iron is used as

A.

an ionizing agent

B.

a reducing agent

C.

a catalyst

D.

a dehydrating agent

E.

an oxidizing agent

Correct answer is C

No explanation has been provided for this answer.

840.

3Cl2 + 2NH3 \(\to\) N2 + 6HCl. In the above reaction, ammonia acts as

A.

a reducing agent

B.

an oxidizing agent

C.

an acid

D.

a catalyst

E.

a dry agent

Correct answer is A

No explanation has been provided for this answer.