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The ion which can be precipitated with both HCl and `H_(2)S` separately is
A. `Pb^(2+)`
B. `Cu^(2+)`
C. `Ca^(2+)`
D. `Sn^(2+)`

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`Pb(NO_(3))_(2)+2HClrarrPbCl_(2)darr+2HNO_(3)`
`Pb(CH_(3)COO)_(2)+H_(2)S rarr underset(("black"))(PbS darr)+2CH_(3)COOH`

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