Mixture of $K B r$ and $K B r O_{3}$ in acidic medium can be used as brominating agent.
The chemical reaction is, $5 B r^{-} + x B r O_{3}^{-} + 6 H^{+} \to 3 B r_{y} + 3 H_{2} O$
Then $x + y$ is :

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Solution

The correct option is C 3
Reaction of process:

$5 B r^{-} + B r O_{3}^{-} + 6 H^{+} \to 3 B r_{2} + 3 H_{2} O$
-1 +5 0
$x$ = 1 , $y$ = 2

$x + y$ = 3

Here, bromide ion oxidises and $B r O_{3}^{-}$ reduces and bromine forms as a product.

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