question_answer

Strong reducing behavior of \[{{H}_{3}}P{{O}_{4}}\] is due to     

A)  presence of one \[-OH\] group and two \[P-H\] bonds

B)  high electron gain enthalpy of phosphorus

C)  high oxidation state of phosphorus

D)  presence of two \[-OH\] groups and one \[P-H\] bond

Correct Answer: A

Solution :

The oxy acid of phosphorus which contain \[P-H\] bond act as a reducing agent or reductant. In \[{{H}_{3}}P{{O}_{2}}\] one \[-OH\] group and two \[P-H\] bonds are present.