During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in NH₄OH solution when sodium carbonate extract was first acidified with dil.HNO₃ and then AgNO₃ solution was added. This indicates presence of:

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$I^{-}$

$C {O_{3}}^{2 -}$

$C l^{-}$

$B r^{-}$

answer is D.

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Detailed Solution

$B r^{Θ}$ ion will react with AgNO₃ and form a pale yellow precipitate which is sparingly soluble in NH₄OH, $C l^{-}$ forms white precipitate with AgNO₃ and $I^{-}$ forms a yellow precipitate with AgNO₃.

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