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# The product formed when vinylacetylene is passed through concentrated hydrochloric acid in presence of cuprous and ammonium chlorides is

$\begin{array}{1 1}(a)\;ClCH_2-CH_2-C\equiv CH\\(b)\;CH_3-CHCl-C\equiv CH\\(c)\;CH_2=CH-CH=CHCl\\(d)\;CH_2=CH-CCl=CH_2\end{array}$

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A)
$CH_2=CH-C\equiv CH\quad\underrightarrow{HCl}\quad CH_2=CH-CCl=CH_2$
Hence (d) is the correct answer.