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BITSAT2013Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Strong reducing behaviour of H ₃ PO ₂ is due to

Options

  1. Apresence of one - OH group and two P - H bonds
  2. Bhigh electron gain enthalpy of phosphorus
  3. Chigh oxidation state of phosphorus
  4. Dpresence of two -OH groups and one P - H bond

Correct answer

A. presence of one - OH group and two P - H bonds

Step-by-step solution

The acids which contain P - H bond have strong reducing properties. Thus H ₃ PO ₂ acid is good reducing agent as it contains two P-H bonds. For example, it reduces AgNO ₃ to metallic silver.

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