Jamb Chemistry Past Questions and Answers

Question 376:

• JAMB 1984

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

Question 377:

• JAMB 1984

The hybridization of the carbon atom in ethyne is

A. Sp ⁴
B. Sp ³
C. Sp²
D. Sp
E. S

Question 378:

• JAMB 1984

An organic compound with a vapour density 56.5 has the following percentage composition:C =53.1% N = 12.4%, O = 28.3%, H = 6.2%. The molecular formula of the compound is
Relative atomic masses: N = 14, O = 16, C = 12, H = 1 )

A. C₃H₆O₂N
B. C₅H₆O₂N
C. (C₅H₇O₂N)_1/2
D. C₅H₇O₂N
E. (C₅H₇O₂N)₂

Question 379:

• JAMB 1984

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

Question 380:

• JAMB 1984

Alkaline hydrolysis of naturally occurring fats and oils yields

A. Fats and acids
B. Soaps and glycerol
C. Margarine and butter
D. Esters
E. Detergents