Strong reducing behaviour of H_3 PO_2 is due to - Vidyadip

MCQ

Strong reducing behaviour of $\mathrm{H}_3 \mathrm{PO}_2$ is due to

A
Low oxidation state of phosphorus.
B
Presence of two$-OH$ groups and one $P-H$ bond.
✓
Presence of one$-OH$ group and two $P-H$ bonds.
D
High electron gain enthalpy of phosphorus.

✓

Answer

Correct option: C.

Presence of one$-OH$ group and two $P-H$ bonds.

In $\mathrm{H}_3 \mathrm{PO}_2,$ two H atoms are bonded directly to $P$ atom which imparts reducing character to the acid.

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