AIIMS2018Chemistry-Organic Chemistry

AIIMS 2018 Chemistry Carbocation Stability Assertion Reason Question

Type: Assertion Reason-conceptual-Medium-Class 11

Assertion:Benzene+CH3CH2CH2ClAlCl3Product is isopropyl benzene\text{Benzene} + \text{CH}_3-\text{CH}_2-\text{CH}_2-\text{Cl} \xrightarrow{\text{AlCl}_3} \text{Product is isopropyl benzene}

Reason: Due to rearrangement of primary carbocation into secondary carbocation.

A

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

B

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

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Correct Answer

Option A

Detailed Explanation

Option A is correct because both the assertion and reason provided in the question are false; the reaction in question does not proceed due to the instability of the proposed carbocation, which cannot be formed under the given conditions. In organic chemistry, stable carbocations are typically tertiary or resonance-stabilized, and if a highly stable carbocation is not formed, the reaction pathway is unlikely to occur. Other options are not applicable as they do not provide relevant information or alternative assertions and reasons, making them irrelevant to the question at hand. Understanding the stability of carbocations is crucial for predicting reaction mechanisms and outcomes in organic reactions.

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