`KNO_(3)` is used to make salt bridge because:

Options

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

Answer

C

Explanation

The salt bridge possesses an electrolyte having nearly same ionic mobilities of its cation and anion.