Which of the following statement is incorrect

Options

A. `H^(+)` is the smallest size cation in the periodic table
B. Van der waals radius of chlorine is more than covelent radius
C. Ionic mobility of hydrated `Li^(+)` is greater than that of hydrated `Na^(+)`
D. he atom has the highest ionisation ehthalpy in the periodic table.

Answer

C

Explanation

Ionic mobilities of hydrated alkali metal ions are as:
`Cs^(+)gtRb^(+)gtK^(+)gtNa^(+)gtLi^(+)`