Chemistry-Alkenes

NEET Chemistry Alkenes Assertion Reason Question

Type: Assertion Reason-assertion-Hard-Class 11

Assertion (A): In the presence of peroxide, the addition of HBr to propene follows the Anti Markovnikov rule. | Reason (R): The presence of peroxide facilitates the formation of a secondary free radical, which is more stable than a primary free radical.

A

Both A and R are true and R is the correct explanation of A.

B

Both A and R are true but R is not the correct explanation of A.

C

A is true but R is false.

D

A is false.

Correct Answer

Option A

Detailed Explanation

The peroxide effect or Kharash effect causes the addition of HBr to unsymmetrical alkenes like propene to follow the Anti Markovnikov rule due to the formation of a more stable secondary free radical.

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