In the silver plating of copper, `K[Ag(CN)_(2)]` is used instead of `AgNO_(3)` . The reason is

Options

A. a thin layer of Ag is formed on Cu
B. more voltage is required
C. `Ag^(+)` ions are completely removed from solution
D. Less availability of `Ag^(+)` ions, as Cu cannot displace Ag from `[Ag(CN)_(2)]^(-)` is

Answer

D

Explanation

In the silver plating of copper, `K[Ag(CN)_(2))]` is used instead of `AgNO_(3)`. The reason is less availability of `Ag^(+)` ions, as Cu cannot dissolves Ag from `[Ag(CN)_(2)]^(-)` ions.