Assertion :Addition of $B r_{2}$ to $4$ -methyl cis- $2$ -pentene gives a pair of enantiomers. Reason: Due to unsymmetrical substitution at carbon-carbon double bond, the enantiomers are produced in unequal amount.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect

Enantiomersare chiral molecules that are mirror images of one another. Furthermore, the molecules are non-superimposable on one another. This means that the molecules cannot be placed on top of one another and give the same molecule.
Assertion - Addition of $B r_{2}$ to4-methyl cis-2-pentene gives a pair of enantiomers (True).
Reason - Due to asymmetrical substitution at $C = C$ double bond, the enantiomers are produced in unequal amount (False) because enantiomeric cyclic bromonium ion gives a racemic mixture of dibromide. So unequal amount is not possible.
Hence, assertion is correct but reason is incorrect.

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Similar questions

Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion :Addition of Br2 to 4-methyl cis-2-pentene gives a pair of enantiomers. Reason: Due to unsymmetrical substitution at carbon-carbon double bond, the enantiomers are produced in unequal amount.

Assertion :Addition of $B r_{2}$ to $4$ -methyl cis- $2$ -pentene gives a pair of enantiomers. Reason: Due to unsymmetrical substitution at carbon-carbon double bond, the enantiomers are produced in unequal amount.