Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
Na
K
Rb
Li
Li+ being smallest has maximum charge density
Li+ is most heavily hydrated among
Option 1)
Na
this is the incorrect option
Option 2)
K
this is the incorrect option
Option 3)
Rb
this is the incorrect option
Option 4)
Li
this is the correct option