1.

Strong reducing behaviour of H_3PO_2 is due to :

Answer»

High oxidation state of phosphorus.
PRESENCE of two -OH groups and ONE P - H bond.
Presence of one -OH group and two P - H bonds.
High electron gain enthalpy of phosphorus.

Solution :Presence of one -OH group and two P - H bonds.
STRONG reducing behaviour of `H_3PO_2`. All oxy-acid of phosphorus which CONTAIN P-H bond act as reductant.
Presence of one -OH group and two P-H bonds.


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