Assertion : Cyanide (CN^{-}) is a strong nucl | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The cyanide ion $(CN^{-})$ is indeed a strong nucleophile because the negative charge is present on the carbon atom,which is less electronegative

Vedclass · Accepted Answer

If the Assertion is correct but Reason is incorrect.

Vedclass · Answer

(C) The cyanide ion $(CN^{-})$ is indeed a strong nucleophile because the negative charge is present on the carbon atom,which is less electronegative than nitrogen,making it a good electron donor. Thus,the Assertion is correct.However,chlorobenzene does not undergo nucleophilic substitution with $KCN$ under normal conditions because the $C-Cl$ bond in chlorobenzene acquires partial double bond character due to resonance,making it resistant to nucleophilic attack. Therefore,benzonitrile cannot be prepared by this method. Thus,the Reason is incorrect.

Assertion : Cyanide $(CN^{-})$ is a strong nucleophile.
Reason : Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide.

Similar Questions

Identify $Y$ in the following reaction.

The rate of reaction is maximum if $G$ is:

Replacement of $Cl$ of chlorobenzene to give phenol requires drastic conditions,but chlorine of $2,4-$dinitrochlorobenzene is readily replaced because:

Which one of the following reactions is $NOT$ possible?

In the Wurtz-Fittig reaction,a compound $X$ reacts with an alkyl halide. What is $X$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : Cyanide $(CN^{-})$ is a strong nucleophile.Reason : Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide.