How many of the following pairs of ions can be separated by `H_2S` in dilute HCl ? `Bi^(3+) and Sn^(4+),Al^(3+) and Hg^(2+),Cd^(2+) and Zn^(2+),Fe^(3+
How many of the following pairs of ions can be separated by `H_2S` in dilute HCl ?
`Bi^(3+) and Sn^(4+),Al^(3+) and Hg^(2+),Cd^(2+) and Zn^(2+),Fe^(3+) and Cu^(2+), As^(3+) and Sb^(3+)`
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Correct Answer - 3
(1)`Al^(3+) and Hg^(2+) underset(H_2S)overset(H^(+))to HgSdarr(black)+Al^(3+)`(in solution)
(2)`Cd^(2+) and Zn^(2+) underset(H_2S)overset(H^(+))to CdSdarr(yellow)+Zn^(2+)`(in solution)
(3)`Fe^(3+) and Cu^(2+) underset(H_2S)overset(H^(+))to CuSdarr(black)+Fe^(3+)`(in solution)
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