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Standard XII

Chemistry

Nitration of Aromatics

Assertion :An...

Question

Assertion :Aniline can be prepared by the reaction of chlorobenzene with $N a {N H}_{2} / L i q . {N H}_{3}$ . Reason: $N H_{2}^{-}$ ion is a stronger nucleophile.

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 D Both Assertion and Reason are incorrect.
Chlorobenzene reacted with the very strong base sodium amide $N a N H_{2}$ at low temperature $- 33^{o} C$ in liquid ammonia to give aniline (aminobenzene). ${N H_{2}}^{-}$ replaces $C l^{-}$ . ${N H_{2}}^{-}$ act as a base in the reaction.

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Assertion :Aniline can be prepared by the reaction of chlorobenzene with NaNH2/Liq.NH3. Reason: NH−2 ion is a stronger nucleophile.

The correct option is D Both Assertion and Reason are incorrect.Chlorobenzene reacted with the very strong base sodium amide NaNH2 at low temperature −33oC in liquid ammonia to give aniline (aminobenzene). NH2− replaces Cl−. NH2− act as a base in the reaction.

Assertion :Aniline can be prepared by the reaction of chlorobenzene with $N a {N H}_{2} / L i q . {N H}_{3}$ . Reason: $N H_{2}^{-}$ ion is a stronger nucleophile.