Which of the following mixtures can be separated by using excess solution ?

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

Problem

Which of the following mixtures can be separated by using excess

\text{NH}_3

solution ? (1)

\text{Bi}^{3+}

(aq.) and

\text{Al}^{3+}

(aq.) (2)

\text{Al}^{3+}

(aq.) and

\text{Zn}^{2+}

(aq.) (3)

\text{Hg}^{2+}

(aq.) and

\text{Pb}^{2+}

(aq.) (4)

\text{Cu}^{2+}

(aq.) and

\text{Cd}^{2+}

(aq.)