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BITSAT 2013
Exam
BITSAT
Year
2013
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

BITSAT 2013 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Strong reducing behaviour of H_ 3 PO_ 2 is due to

Strong reducing behaviour of H3PO2\mathrm{H}_{3} \mathrm{PO}_{2} is due toStrong reducing behaviour of H_ 3 PO_ 2 is due to

Options

  1. Apresence of one −OH-\mathrm{OH} group and two P−H\mathrm{P}-\mathrm{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\mathrm{P}-\mathrm{H} bond

Correct answer

A. presence of one −OH-\mathrm{OH} group and two P−H\mathrm{P}-\mathrm{H} bonds

Step-by-step solution

The acids which contain P−H\mathrm{P}-\mathrm{H} bond have strong reducing properties. Thus H3PO2\mathrm{H}_{3} \mathrm{PO}_{2} acid is good reducing agent as it contains two P-H bonds. For example, it reduces AgNO3\mathrm{AgNO}_{3} to metallic silver. Strong reducing behaviour of H_ 3 PO_ 2 is due to
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