Which of the following statements is/are true? (A) \( \mathrm{Ag}^{...

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Which of the following statements is/are true?
(A) \( \mathrm{Ag}^{+} \)ions do not give white precipitate with excess of concentrated \( \mathrm{HCl} \).
(B) \( \mathrm{Cu}^{2+} \) ions produce a white precipitate when \( \mathrm{KCN} \) solution is added in a small quantity, and allowed
\( \mathrm{P} \) to stand.

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(C) \( \mathrm{Hg}^{2+} \) ions give deep blue precipitate with cobalt acetate and ammonium thiocyanate.
(D) Black precipitate of \( \mathrm{Bil}_{3} \) turns orange when heated with water.
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