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(C) Acetylene $(CH \equiv CH)$ is a terminal alkyne with acidic hydrogen atoms. It reacts with ammoniacal cuprous chloride $(Cu_2Cl_2 + NH_4OH)$ to fo

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Ammoniacal cuprous chloride

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(C) Acetylene $(CH \equiv CH)$ is a terminal alkyne with acidic hydrogen atoms. It reacts with ammoniacal cuprous chloride $(Cu_2Cl_2 + NH_4OH)$ to form a red precipitate of copper$(I)$ acetylide. Ethylene $(CH_2 = CH_2)$ does not contain acidic hydrogen and does not react with ammoniacal cuprous chloride. Therefore,this reagent is used to distinguish between them.

$X = x$	$-2$	$-1$	$0$	$1$	$2$	$3$
$P(X = x)$	$\frac{1}{10}$	$k$	$\frac{1}{5}$	$2k$	$\frac{3}{10}$	$k$

Which of the following is used to distinguish between ethylene and acetylene?

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