Which of the following statment (s) is (are) ture - (A) \( \mathrm{Cu}^{2+} \) salts form solubl...

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Which of the following statment (s) is (are) ture -
(A) \( \mathrm{Cu}^{2+} \) salts form soluble complex with excess \( \mathrm{KCN} \)
\( P \)
(B) \( \mathrm{Cu}^{2+} \) salts form soluble complex with aqueous ammonia
W
(C) \( \mathrm{Cu}^{2+} \) salts form soluble complex with \( \mathrm{KI} \)
(D) A piece of iron or zinc when place in \( \mathrm{Cu}^{2+} \) salt solution, Precipitates copper
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