Which of the following has the highest conductivity ?

Options

A. `Li^(+)`
B. `Cs^(+)`
C. `Na^(+)`
D. `K^(+)`

Answer

B

Explanation

Highest electrical conductivity in water is of `Cs^(+)` ion.
The order is
`Li^(+) lt Na^(+) lt K^(+) lt Rb ^(+) lt Cs^(+)`
This is due to extent of hydration, which is maximum in `Li^(+)`.