Chemistry questions and answers

Chemistry Questions and Answers

Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.

2,391.

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.

2,393.

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.

2,394.

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.

2,395.

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.