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Question

Iodine is formed when potassium iodide reacts with :
$Z n S O_{4}$
$C u S O_{4}$
$C l_{2}$
$B r_{2}$

A

B r_{2}

B

Z n S O_{4}

C

C u S O_{4}

D

C l_{2}

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Solution

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Reaction is:
$2 C u S O_{4} + 4 K I \to 2 C u I + I_{2} + 2 K_{2} S O_{4}$
$2 K I + C l_{2} \to 2 K C l + I_{2}$
$2 K I + B r_{2} \to 2 K B r + I_{2}$

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