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Nucleophilic Substitution in Aryl Halides

Assertion :In...

Question

Assertion :In comparison to $C_{2} H_{5} B r$ , it is difficult to carry out $S_{N} 1$ reaction on vinyl bromide. Reason: Vinyl group is electron donating.

A

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

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B

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

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C

Assertion is correct but Reason is incorrect.

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D

Assertion is incorrect but Reason are correct.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
Vinyl halide is a chemical compound in which the halogen group is attached to one of the carbons present in the alkene group. The carbon atom to which the halogen group is attached will be having $s p^{2}$ hybridisation. Due to the presence of double bonds it can undergo delocalization. It will be having resonance structure and hence, the vinyl halide is less reactive. Therefore, it will be difficult to carry out the $S_{N} 1$ reaction.
Hence the Assertion is correct but the reason is wrong.
So, the correct answer is "Option $C^{''}$

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Nucleophilic Substitution in Aryl Halides

Standard XII Chemistry

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