Assertion :During addition of $B r_{2}$ to propane following reactive intermediates are formed. Reason: I and II are resonance structures.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
During addition of bromine to propane, cyclic bromonium ion is obtained as an intermediate. The double bond of the propene is donated to the electrophile $B r^{+}$ ion. The cyclic bromonium ion is the resonance hybrid of structures I and II. Thus, both assertion and reason are correct but the reason is not the correct explaination of the assertion.

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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.
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Assertion :During addition of Br2 to propane following reactive intermediates are formed. Reason: I and II are resonance structures.

Assertion :During addition of $B r_{2}$ to propane following reactive intermediates are formed. Reason: I and II are resonance structures.