AIIMS 2019 Chemistry Carbonyl Compounds Assertion Reason Question
Assertion: The double bond of carbonyl group has higher bond energy than double bond in alkenes. Reason: Carbonyl group has sp² hybridization.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Option B is correct because the assertion that the double bond of a carbonyl group (C=O) has higher bond energy than the double bond in alkenes (C=C) is true; the carbonyl bond is stronger due to the presence of a highly electronegative oxygen atom, which stabilizes the bond through resonance. However, the reason provided, that the carbonyl group has sp² hybridization, does not directly explain the higher bond energy, as both C=O and C=C involve sp² hybridized carbon atoms. Option A is incorrect because the reason does not correctly explain the assertion. Options C and D are incorrect as both the assertion and reason are true, but the reason is not a valid explanation for the assertion.
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