Saturated solution fo `KNO_3` is used to make "salt bridge" because .

Options

A. ` KNO_3` is highly soluble in water
B. Velocity of ` NO_3^(-)` is greater than that of ` K^(+)`
C. Velocities of both ` K^+` and ` NO_3^(-)` are nearly the same
D. Velocity of ` K^(+)` is greater than that of ` NO_3^(-)`

Answer

C

Explanation

Both ` K^+ (aq)` and ` NO_3^(-)` (aq) have nearly the same velocity . As a result , the electrical charges in both anode and cathode compartments are nullified almost simultaneously. This helps in smooth flow of current.