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The P-Block Elements

Question
CBSEENCH12011259

Strong reducing behaviour of H3PO4 is due to

  • the presence of one -OH group and two P-H bonds

  • high electron gain enthalpy of phosphorous 

  • the high oxidation state of phosphorus

  • the presence of two -OH groups and one P-H bond

Solution

A.

the presence of one -OH group and two P-H bonds

The oxy-acid of phosphorus which contains P- H bond act as a reducing agent or reductant.

In H3PO2 one -OH group and two P-H bonds are present.