Question

Which of the following pairs can be separated by $H_{2}S$ in $dil.HCl$?

• A. $C{u}^{2+}$ and $C{d}^{2+}$
• B. $C{u}^{2+}$ and $N{i}^{2+}$
• C. $C{u}^{2+}$ and $Z{n}^{2+}$
• D. $H{g}^{2+}$ and $A{l}^{3+}$

Answer 1

Answer: (B), (C), (D)

The correct options are
B $C{u}^{2+}$ and $N{i}^{2+}$
C $C{u}^{2+}$ and $Z{n}^{2+}$
D $H{g}^{2+}$ and $A{l}^{3+}$

Option (B),(C),(D) are correct.
(A): Both $C{u}^{2+}$ and $C{d}^{2+}$ are precipitated in II group by $H_{2}S$ in $dil.HCl$.