Comment on the reactions of dihydrogen with chlorine.

3

(a)

Describe the usefulness of water in biosphere and biological system.

3

(a)

Comment on the reactions of dihydrogen with copper(II) oxide

3

(a)

Do you expect different products in solution when aluminium (III) chloride and pottassium chloride are treated separately with 
(i) normal water
(ii) acidified water, and
(iii) alkaline water? Write equations whatever necessary.

3

(a)

Compare the structure of H₂O and H₂O₂.

3

(a)