(i) Are all the five bonds in `PCl_(5)` equivalent ? Justify.
(ii) How do you account for the reducing behaviour of `H_(3)PO_(2)` ?
(iii) Why is `BiH_(3)` the strongest reducing agent amongst all the hydrides of Group 15 elements ?
(iv) What happens when white phosphorus is heated with concentrated NaOH solution in an inert atmosphere of `CO_(2)` ?

What happens when white phosphorus is heated with concentrated NaOH solution in an inert atomosphere of CO_(2) ?

Why is the BiH_(3) strongest reducing agent amongst all the hydrides of group 15 ?

How do you account for reducing behaviour of H_(3)PO_(2) on the basis of its structure?

Give reasons for the following: (i) Oxygen is a gas but sulphur is a solid. (ii) O_(3) acts as a powerful oxidising agent. (iii) BiH_(3) is the strongest reducing agent amongst all the hydrides of Groups 15 elements.

(a) Why does PCl_3 fume in moisture ? (b) Are all the five bonds in PCl_5 molecule equivalent ? Justify your answer. ( c) How do you account for the reducing behaviour of H_3 PO_2 on the basic of its structure ? (d) Give the disproportional reaction of H_3PO_3 .

(a) Account for the following observations : (i) SF_(1) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (ii) Chlorine water is a powerful bleaching agent. (iii) Bi (V) is a stronger oxidising agent than Sb(V) (b) What happens when : (i) White phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO_(2). (ii) XeF_(6) undergoes partial hydrolysis. (Give the chemical equations involved).