The ion having highest mobility in aqueous solutionis

Options

A. `Be^(2+)`
B. `Mg^(2+)`
C. `Ca^(2+)`
D. `Ba^(2+)`

Answer

D

Explanation

Through `Ba^(2+)` is the heaviest ion but it is least hydrated. As a result, its size becomes lesser than any other hydrated alkaline earth metal cation and hence has the highest ionic mobility.