Which one of the following statement is correct - (A) From a mixed precipitate of \( \mathrm{AgC...

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Which one of the following statement is correct -
(A) From a mixed precipitate of \( \mathrm{AgCl} \) and \( \mathrm{AgI} \), ammonia solution dissolves only \( \mathrm{AgCl} \)
(B) Ferric ions give a deep green precipitate on adding potassium ferrocyanide solution
(C) On boiling a solution having \( \mathrm{K}^{+}, \mathrm{Ca}^{2+} \) and \( \mathrm{HCO}_{3}^{-} \)ions we get a precipitate of \( \mathrm{K}_{2} \mathrm{Ca}\left(\mathrm{CO}_{3}\right)_{2} \)
(D) Manganese salts give a violet borax bead test in the reducing flame
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