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MHT CET2018Chemistryp Block Elements (Group 15, 16, 17 & 18)

Which among the following oxoacids of phosphorus shows a tendency of disproportionation?

Options

  1. APhosphinic acid H 3 P O 2
  2. BOrthophosphoric acid H 3 P O 4
  3. CPhosphonic acid H 3 P O 3
  4. DPyrophosphoric acid H 4 P 2 O 7

Correct answer

C. Phosphonic acid H 3 P O 3

Step-by-step solution

4 H 3 PO 3 → 3 H 3 PO 4 + PH 3 ↓ (phosphonic acid) in H 3 PO 3 the oxidation state is +3 (Intermediate oxidation state) so it can under goes disproportionation reaction

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