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NEET2016ChemistryIonic EquilibriumActual

Assertion : H ₂ ~S is stronger acid than PH ₃ . Reason : S is more electronegative than P , conjugate base HS ⁻ is more stable than H ₂ P ⁻ .

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

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

aligned & H ₂ ~S _ (g) +a q HS _ (a q) ⁻+ H _ (a q) ⁺ & PH _ 3(g) +a q H ₂ P ⁻+ H _ (a q) ⁺ aligned As S is more electronegative than P , conjugate base HS ⁻ is more stable than H ₂ P ⁻ . Hence, H ₂ ~S is stronger acid than PH ₃ .

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