AIIMS 2018 Chemistry β-Dehydrohalogenation Assertion Reason Question
Assertion: β-dehydrohalogenation of alkyl halides is anti elimination in which bond breaking and bond forming occur simultaneously. Reason: β-Dehydrohalogenation of alkyl halides gives Saytzeff product.
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 A is correct because the assertion accurately describes β-dehydrohalogenation as an anti elimination process where the breaking of the C–X bond (X being a halogen) and the forming of the C=C double bond occur simultaneously, consistent with the mechanism of E2 reactions. The reason is also true, as β-dehydrohalogenation typically leads to the Saytzeff product, which is the more substituted alkene favored due to greater stability.
Options B and C are incorrect because while both the assertion and reason are true, the reason directly explains the assertion by linking the mechanism to the product outcome. Option D is incorrect as both statements are valid.
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