State reasons for each of the following:
(i) All the P-Cl bonds in PCl₅ molecule are not equivalent.
(ii) Sulphur has greater tendency for catenation than oxygen.

2

(a)

Assign a reason for each of the following statements:
(i) More metal fluorides are ionic in nature than metal chlorides.
(ii) SCI₆ is not known but SF₆ is known.

2

(a)

Explain why the stability of oxoacids of chlorine increases in the order given below:
HCIO < HCIO₂ < HCIO₃ < HCIO₄

2

(a)

Write a balanced chemical equation for the reaction showing catalytic oxidation of NH₃ by atmospheric oxygen.

2

(a)

Write the structure of pyrophosphoric acid.

2

(a)