The ion that can not be precipited by \( \mathrm{H}_{2} \mathrm{~S} \) in presence of dil. \( \m...

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The ion that can not be precipited by \( \mathrm{H}_{2} \mathrm{~S} \) in presence of dil. \( \mathrm{HCl} \) :
(a) \( \mathrm{Pb}^{2+} \)
(b) \( \mathrm{Bi}^{3+} \)
(c) \( \mathrm{Cu}^{2+} \)
(d) \( \mathrm{Sn}^{2+} \)
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