A standard solution of `KNO_(3)` is used to make salt bridge, because

Options

A. Velocity of `K^(+)` is greater than that of `NO_(3)^(-)`
B. Velocity of `NO_(3)^(-)` is greater than that of `K^(+)`
C. Velocities of both `K^(+)` and `NO_(3)^(-)` are nearly the same
D. `KNO_(3)` is highly soluble in water

Answer

C

Explanation

The salt bridge possesse, the electrolyte having nearly same ionic mobilities of its cation and anion.