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NEET2012Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Assertion : H ₃ PO ₂ has strong reducing property but H ₃ PO ₄ does not. Reason : P - OH bond present in H ₃ PO ₄ .

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion

Step-by-step solution

Oxoacids of phosphorus which contain P - H bond act as reducing agents and reduce metal salts to free metals. Thus, H ₃ PO ₂ act as reducing agent while H ₃ PO ₄ does not.

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