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
Option 3) Strong reducing behavior of H3PO2 is due to the presence of one - OH group and two P - H bonds. The reducing properties of oxyacids of phosphorous are due to the presence of P-H bond. It has high tendency to release protons. Thus exhibits reducing nature
