$C_6{H}_6 + C_2{H}_{5}Cl\stackrel{\text{'}X\text{'}}{\to }\text{'}Y\text{'}$ 

The wrong statement among the following is

Given data : It is given to identify the wrong statement.

Explanation

The product will be Ethyl benzene, here's the observation of the reaction can carbon be $s{p}^2$ hybridized. A carbon atom bound to three atoms (two single bonds, one double bond) is $s{p}^2$ hybridized and forms a flat trigonal or triangular arrangement with 120° angles between bonds. So the correct answer here is B All carbons in Y are $s{p}^2$hybridized.

The compound ethyl benzene contains both $s{p}^2$ and $s{p}^3$ carbons.

Hence, the correct answer  (B),  All carbons in Y are sp² hybridized.