Identify the end product (Z) in the sequence | vedclass

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(B) $1$. The reaction of $C_2H_4Br_2$ ($1$,$2$-dibromoethane) with $Alc. KOH$ followed by $NaNH_2$ leads to dehydrohalogenation to form ethyne $(X = H

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$C_6H_5COCH_3$

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(B) $1$. The reaction of $C_2H_4Br_2$ ($1$,$2$-dibromoethane) with $Alc. KOH$ followed by $NaNH_2$ leads to dehydrohalogenation to form ethyne $(X = HC \equiv CH)$.$2$. Passing ethyne through a red-hot iron tube at $873 \ K$ results in cyclic polymerization to form benzene $(Y = C_6H_6)$.$3$. Benzene reacts with acetyl chloride $(CH_3COCl)$ in the presence of anhydrous $AlCl_3$ via Friedel-Crafts acylation to produce acetophenone $(Z = C_6H_5COCH_3)$.

Identify the end product $(Z)$ in the sequence of the following reactions:
$C_2H_4Br_2$ $\xrightarrow[(ii) NaNH_2]{(i) Alc. KOH} X$ $\xrightarrow[873 \ K]{\text{Red hot Fe tube}} Y$ $\xrightarrow[\text{Anhy } AlCl_3, \Delta]{CH_3COCl} Z$

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Identify the end product $(Z)$ in the sequence of the following reactions:$C_2H_4Br_2$ $\xrightarrow[(ii) NaNH_2]{(i) Alc. KOH} X$ $\xrightarrow[873 \ K]{\text{Red hot Fe tube}} Y$ $\xrightarrow[\text{Anhy } AlCl_3, \Delta]{CH_3COCl} Z$