Question

Which of the following pairs of ions cannot be separated by $H_{2}S$ in dilute HCl?

• A. $B{i}^{3+},S{n}^{4+}$
• B. $A{l}^{3+},H{g}^{2+}$
• C. $Z{n}^{2+},C{u}^{2+}$
• D. $N{i}^{2+},C{u}^{2+}$

Answer 1

The correct option is A $B{i}^{3+},S{n}^{4+}$

In the presence of HCl, both the ions are precipitated by $H_{2}S$
Hence cannot be separated by $H_{2}S$
Option A is correct.