Which one among the following pairs of ions cannot be separated by `H_(2)S` in dilute hydrochloric acid ?A. `Bi^(3+) , Sn^(4+)`B. `Al^(3+) , Hg^(2+)`C. `Zn^(2+) , Cu^(2+)`D. `Ni^(2+) , Cu^(2+)`

Which one among the following pairs of ions cannot be separated by `H_

1.	Which one among the following pairs of ions cannot be separated by `H_(2)S` in dilute hydrochloric acid ?A. `Bi^(3+) , Sn^(4+)`B. `Al^(3+) , Hg^(2+)`C. `Zn^(2+) , Cu^(2+)`D. `Ni^(2+) , Cu^(2+)`
Answer» Correct Answer - A Both belong to same group i.e. `II^(nd)` group and their `K_(SP)` values are low, so both are precipitated according to the following reactions. `{:(2Bi^(3+),+,3S^(2-),to,Bi_(2)S_(3),darr,("black")),(Sn^(4+),+,2S^(2-),to,SnS_(2),darr,("yellow")):}`

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Which one among the following pairs of ions cannot be separated by `H_(2)S` in dilute hydrochloric acid ?A. `Bi^(3+) , Sn^(4+)`B. `Al^(3+) , Hg^(2+)`C. `Zn^(2+) , Cu^(2+)`D. `Ni^(2+) , Cu^(2+)`

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