Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 141:

• JAMB 2013

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

A. Carbon-14
B. Phosphorus-32
C. Cobalt-60
D. Iodine-131

Question 142:

• JAMB 2013

The constituent of air that acts as a diluent is

A. Nitrogen
B. Carbon (IV) oxide
C. Noble gases
D. Oxygen

Question 143:

• JAMB 2013

Steam changes the colour of anhydrous cobalt (ll) chloride from

A. White to red
B. Blue to white
C. Blue to pink
D. White to blue

Question 144:

• JAMB 2013

In the laboratory preparation of ammonia, the flask is placed in a slanting position so as to

A. Prevent condensed water from breaking the reaction flask
B. Enable the proper mixing of the reactions in the flask
C. Enhance the speed of the reaction
D. Prevent formation of precipitate

Question 145:

• JAMB 2013

Which of the following fraction is used as raw material for the cracking process?

A. Kerosine
B. Lubricating oil
C. Bitumen
D. Diesel oils