Water - Jamb Chemistry Past Questions and Answers

Question 36:

• JAMB 1998

Potassium tetraoxomanganate (VII) is often added to impure water to?

A. Reduce organic impurities
B. Reduce inorganic impurities
C. Destroy bacteria and algae
D. Remove permanent hardness

Question 37:

• JAMB 1998

Soap lather is an example of a colloid in which a?

A. Liquid is dispersed in gas
B. Solid is dispersed in liquid
C. Gas is dispersed in liquid
D. Liquid is despersed in liquid

Question 38:

• JAMB 1998

A solution containing chloride ions gives white precipitate with silver trioxonitrate(V) Solution. The precipitate will be insoluble in dilute?

A. HNO ₃ but soluble in ammonia solution
B. HNO₃ and ammonia solution
C. HCl but soluble in ammonia solution
D. HCl and in ammonia solution

Question 39:

• JAMB 1999

In which of the following are water molecules in the most disorderly arrangement?

A. Ice at -10°C
B. Ice at 0°C
C. Water at 100°C
D. Steam at 100°C

Question 40:

• JAMB 1999

The method that can be used to convert hard water to soft water is

A. Chlorination
B. Passage over activated charcoal
C. The use of an ion-exchange resin
D. Aeration