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NEET2012ChemistryHydrocarbonsActual

Assertion : HC C ⁻ is more stable than H ₂ C = CH ⁻ . Reason : HC C ⁻ has more s-character than H ₂ C = CH ⁻

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

HC C ⁻ has 50 % s-character and H ₂ C = CH ⁻ has 33 % s-character. Stability of carbanions increases with an increase in the s-character at the carbanion. So HC C ⁻ is more stable than H ₂ C = CH ⁻ .

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