1.

The ion that cannot be precipitated by both HCl and H2S is :(a) Pb2+ (b) Cu2+ (c) Ag+ (d) Ca2+

Answer»

Correct Option is : (D) \(Ca^{2+}\)

\(Ca^{2+}\) ion cannot be precipitated by both HCl and \(H_2S\) . While \(Pb^{2+}\) , \(Cu^{2+}\) , and \(Ag^+\) ions belongs to group II Cations they precipitated as metal sulphide in presence of HCl .

Option : (d) Ca2+



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