Question

Which one of the following four metals would be displaced from the solution of its salt by other three metals?

• A. Mg
• B. Ag
• C. Zn
• D. Cu

Answer 1

Answer: (B)

Ag

Ag metal would be displaced from the solution of its salt by Mg, Zn or Cu metals.

Among the given metals, the standard reduction potential for the half reaction $A{g}^{+}+e^{-}\to Ag$ is maximum.

Hence, among the given metals (ions), $A{g}^{+}$ ion has maximum strength as oxidising agent. Hence, $A{g}^{+}$ ion gains an electron and other metals loses electron.