Question

Acidic aqueous solution contain $CuSO_{4},$ $ZnSO_{4},MgSO_{4},CdSO_{4}$ when react with $H_{2}S_{\left(\right. g \left.\right)},$ Ions which is/are precepitated as metal sulphide.

• A. $Cu^{+ 2},Cd^{+ 2}$
• B. only $Cu^{+ 2}$
• C. $Mg^{+ 2},Zn^{+ 2}$
• D. $Cu^{+ 2},Zn^{+ 2},Cd^{+ 2}$

Answer 1

Answer: (A)

In acidic medium only group- $II$ $\left(\right.A>B\left.\right)$ metal can be precipitated on sulphide i.e., $Cu^{+ 2}\&Cd^{+ 2}$