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Strong reducing behaviour of `H_(3)PO_(2)` is due to

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Strong reducing behaviour of `H_(3)PO_(2)` is due to
A. High oxidation state of phosphorus
B. Presence of two -OH groups and one P-H bond
C. Presence of one -OH group and two P-H bonds
D. High electron gain enthalpy of phosphorus.
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Correct Answer - C
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`H_(3)PO_(2)` is monobasic acid and act reducing agent due to presence of two P-H bond
`H_(3)PO_(2)+2Ag_(2)O to H_(3)PO_(4) + 4Ag`
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