Acetylene react with $H C N$ in the presence of $B a (C N)_{2}$ to yield

1, 1 -

dicayanoethane

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1, 2 -

dicyanoethane

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Vinyl cyanide

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None of these

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Solution

The correct option is B $1, 1 -$ dicayanoethane
Acetylene react with $H C N$ in the presence of $B a (C N)_{2}$ to yield 1,1-dicyanoethane.
$C H \equiv C H + H C N B a (C N)_{2} - ---- \to (C N)_{2} C H - C H 3$

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