When a copper wire is placed I a solution of `AgNO_3`, the solution acquires blue colour. This due to the formation of .

Options

A. `Cu^(2+)` ions
B. `Cu^(+)` ions
C. Soluble complexof copper with `AgNO_(3)`
D. `Cu^(-)` ion by the reduction of Cu

Answer

A

Explanation

Since, `Ag^(+)` ions are reduced to Ag and
`E_(Ag^(+)//Ag)^(o) gt E_(Cu^(++)//Cu)^(o)` Cu is oxidised to `Cu^(++)`.