Which of the following cations cannot be separated by passing through their solutions…

CHEMISTRY · Single correct · ICSE · Chemistry · Analytical Chemistry · Analytical Chemistry

Problem

Which of the following cations cannot be separated by passing

\text{H}_2\text{S}

through their solutions to which

\text{NH}_4\text{Cl}

and

\text{NH}_4\text{OH}

have been added? (1)

\text{Ca}^{2+}

and

\text{Ni}^{2+}

(2)

\text{Mg}^{2+}

and

\text{Mn}^{2+}

(3)

\text{Ni}^{2+}

and

\text{Mn}^{2+}

(4)

\text{Co}^{2+}

and

\text{Zn}^{2+}