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Q)

A salt solution is treated with chloroform drops. Then it is shaken with chlorine water. Chloroform layer becomes violet, solution obtains

(a) $NO_3^-$ ion
(b) $NO_3^-$ ion
(c) $Br^-$ ion
(d) $I^-$ ion

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A)
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Answer: $I^-$ ion
 
$NaI + Cl_2 \longrightarrow 2NaCl + I_2$
             Chlorine                (Violet colour in $CHCl_3$ layer is due to iodine)
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