Question

Assertion: 4-Nitrochlorobenzene undergoes nucleophilic substitution more readily than chlorobenzene.

Reason: Chlorobenzene undergoes nucleophilic substitution by elimination-addition mechanism while 4-nitrochlorobenzene undergoes nucleophilic substitution by addition-elimination mechanism. 

(A) If both assertion and reason true and reason is the correct explanation of assertion, then mark (A) 

(B) If both assertion and reason are true but reason is not the correct explanation of assertion, then mark (B) 

(C) If assertion is true but reason is false, then mark (C) 

(D) If both assertion and reason false, then mark (D)

Answer 1

Correct Option  (B) If both assertion and reason are true but reason is not the correct explanation of assertion, then mark (B) 

Explanation:

Both statements are true but 4-nitrochlorobenzene goes nucleoliphilic substitutions more readily than benzene due to the M-effect of nitro group 2 +ve charge is created on C attaches to Cl Molecule.