Strong reducing behaviour of H3PO2

Question:

Strong reducing behaviour of H3PO2 is due to

(i) The low oxidation state of phosphorus

(ii) Presence of two –OH groups and one P–H bond

(iii) Presence of one –OH group and two P–H bonds

(iv) High electron gain enthalpy of phosphorus

Solution:

Option (iii) Presence of one –OH group and two P–H bonds is the answer.

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