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Question: Answered & Verified by Expert
Phosphorus acid on heating gives the following products
4H3PO3Δ3H3PO4+PH3
The above reaction is an example of
Chemistryp Block Elements (Group 15, 16, 17 & 18)NEET
Options:
  • A oxidation
  • B thermal decomposition
  • C disproportionation
  • D reduction
Solution:
1738 Upvotes Verified Answer
The correct answer is: disproportionation
4H3PO3Δ3H3PO4+PH3
In the reaction, the acid in +3 oxidation state of P tends to disproportionate to higher (+5) and lower (-3) oxidation state in H3PO4 and PH3 respectively.

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