Assertion :Addition of HBr to propene yields 2-bromopropane but in presence of a peroxide it yields 1-bromopropane. Reason: When reaction is carried out in the presence of a peroxide it follows free radical mechanism, $2^{0}$ free radical is more stable than $1^{0}$ free radical.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Due to the formation of secondary radical, it forms 1-bromopropane. It happens for peroxide reaction for $B r_{2}$ addition.
Stability: $C H_{3} - ⨁ C H - C H > C H_{3} - C H_{2} - ⨁ C H_{2}$
Stability: $C H_{3} - ∙ C H - C H_{3} > C h_{3} - C H_{2} - ∙ C H_{2}$
Secondary carbon having radical or cation is having more hyperconjugation, so more stable.

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Similar questions

Q. Assertion :Propene reacts with

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in the presence of benzoyl peroxide to yield 2-bromopropane. Reason: In presence of peroxide, the addition of

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Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.
Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.
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(d) Assertion is wrong statement but reason is correct statement.
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(R O O R)

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Assertion (A) Like bromination of benzene, bromination of phenol is also carried out in the presence of Lewis acid.
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(a) Assertion and reason both are correct and reason is correct explanation of assertion.
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Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.

Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
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Assertion :Addition of HBr to propene yields 2-bromopropane but in presence of a peroxide it yields 1-bromopropane. Reason: When reaction is carried out in the presence of a peroxide it follows free radical mechanism, 20 free radical is more stable than 10 free radical.

Assertion :Addition of HBr to propene yields 2-bromopropane but in presence of a peroxide it yields 1-bromopropane. Reason: When reaction is carried out in the presence of a peroxide it follows free radical mechanism, $2^{0}$ free radical is more stable than $1^{0}$ free radical.