Water - Jamb Chemistry Past Questions and Answers

Question 26:

• JAMB 1992

Water for town supply is chlorinated to make it free from?

A. Bad odour
B. Bacteria
C. Temporary hardness
D. Permanent hardness

Question 27:

• JAMB 1993

Water has a rather high boiling point despite its low molecular mass because of the presence of?

A. Hydrogen bonding
B. Covalent bonding
C. Ionic bonding
D. Metallic bonding

Question 28:

• JAMB 1993

Water can be identified by the use of?

A. Anhydrous copper (II) tetraoxosulphate (VI)
B. Anhydrous sodium trioxocarbonate (IV)
C. Potassium heptaoxochromate (VII)
D. Copper (II) trioxocaronate (IV)

Question 29:

• JAMB 1993

The phenomenon whereby sodium trioxocarbonate (IV) decahydrate loses some of its water of crystallization on exposure to the atmosphere is known as?

A. Deliquescene
B. Hygroscopy
C. Effervescence
D. Efflorescence

Question 30:

• JAMB 1994

Clothes should be properly rinsed with water after bleaching because?

A. The bleach decolourizes the cothes
B. Chlorine reacts with fabrics during bleaching
C. The clothes are sterilized during bleaching
D. Hydrogen chloride solution is produced during bleaching