The pair(s) of ions where BOTH the ions are precipitated upon passing H 2 S gas in presence of dilute HCl,…

1. $\mathrm{B}{\mathrm{a}}^{2+},\mathrm{ }\mathrm{Z}{\mathrm{n}}^{2+}$
2. $\mathrm{B}{\mathrm{i}}^{3+},\mathrm{ }\mathrm{F}{\mathrm{e}}^{3+}$
3. $\mathrm{C}{\mathrm{u}}^{2+},\mathrm{ }\mathrm{P}{\mathrm{b}}^{2+}$
4. $\mathrm{H}{\mathrm{g}}^{2+},\mathrm{ }\mathrm{B}{\mathrm{i}}^{3+}$

Solution

Asked in: JEE Advanced 2015 (Paper 2)

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