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Valency to Chemical Formula

C 2 H 2 on re...

Question

$C_{2} H_{2}$ on reaction with 1 mole $N a {N H}_{2}$ following by reaction with ${C H}_{3}$ Br gives 'x' the molecular formula of x is :

C_{2} H_{6}

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C_{4} H_{8}

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C_{3} H_{4}

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C_{3} H_{6}

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Solution

The correct option is D $C_{3} H_{4}$
The reaction of $C_{2} H_{2}$ with $N a N H_{2}$ is,
$C_{2} H_{2} + N a N H_{2} \to C_{2} H N a + N H_{3}$
The $C_{2} H N a$ so formed further is reacted with $C H_{3} B r$ .
The reaction is,
$C_{2} H N a + C H_{3} B r \to C_{3} H_{4} + N a B r$

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