What is underline{Z} in the following sequenc | vedclass

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(D) The reaction sequence is as follows:$1$. Chlorobenzene reacts with acetyl chloride $(CH_3COCl)$ in the presence of anhydrous $AlCl_3$ (Friedel-Cra

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$-CH_2CH_3$

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(D) The reaction sequence is as follows:$1$. Chlorobenzene reacts with acetyl chloride $(CH_3COCl)$ in the presence of anhydrous $AlCl_3$ (Friedel-Crafts acylation) to form $p$-chloroacetophenone as the major product $(X)$.$2$. $X$ ($p$-chloroacetophenone) undergoes Clemmensen reduction using $Zn-Hg$ and $conc. HCl$,which reduces the carbonyl group $(-COCH_3)$ to an ethyl group $(-CH_2CH_3)$.$3$. Therefore,the final product is $1-chloro-4-ethylbenzene$,and $\underline{Z}$ is the ethyl group,$-CH_2CH_3$.

What is $\underline{Z}$ in the following sequence of reactions?

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