Assign reason for the following : (i) `H_(3)PO_(2)` is a stronger reducing agent than `H_(3)PO_(4)`. (ii) Sulphur shows more tendency for catenation than oxygen. (iii) Reducing character increases from HF to HI.

Assign reason for the following : (i) `H_(3)PO_(2)` is a stronger redu

1.	Assign reason for the following : (i) `H_(3)PO_(2)` is a stronger reducing agent than `H_(3)PO_(4)`. (ii) Sulphur shows more tendency for catenation than oxygen. (iii) Reducing character increases from HF to HI.
Answer» In `H_(3) overset(+1)(PO_(2))`, the oxidation state of P can increase upon `+5`. But in `H_(3) overset(+5)(PO_(4))`. P atom is already in highest oxidation state `(+5)`. Therfore, `H_(3)PO_(2)` acts as stronger reducing agent than `H_(3)PO_(4)`. In fact, the latter can act only as oxidising agent.

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Assign reason for the following : (i) `H_(3)PO_(2)` is a stronger reducing agent than `H_(3)PO_(4)`. (ii) Sulphur shows more tendency for catenation than oxygen. (iii) Reducing character increases from HF to HI.

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