(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) Why does `PCl_3` fume in moisture ? (b) Are all the five bonds in

1.	(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`.
Answer» In `H_(3)PO_(2)`, two H atoms are bonded directly to P atom which imparts reducing character to the acid.

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(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`.

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