The ionic conductance of the following cations in a given concentration is in the order

Options

A. `Li^(+) lt Na^(+)ltK^(+)ltRb^(+)`
B. `Li^(+) gt Na^(+)gtK^(+)gtRb^(+)`
C. `Li^(+) gt Na^(+)ltK^(+)ltRb^(+)`
D. `Li^(+) = Na^(+)ltK^(+)ltRb^(+)`.

Answer

A

Explanation

`Li^(+)` cation being smallest of all is heavily hydrated and `Rb^(+)` being biggest is poorly hydrated. Hence ionic conductance of `Li^(+)` is lowest and that of `Rb^(+)` is highest.