Bromine vapours are passed into a soln. of ethyne in carbon tetrachloride gives :

C H B r_{2} - C H B r_{2}

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C H_{2} B r - C H B r_{2}

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C H_{2} B r - C H_{2} B r

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C H_{3} - C H_{3}

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Solution

The correct option is A $C H B r_{2} - C H B r_{2}$
Reaction:
$C H \equiv C H + 2 B r_{2} \to C H B r_{2} - C H B r_{2}$
In this reaction, the bromination of alkyne across triple bond takes place to form corresponding tetrabromo alkyl as a product.

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