The coagulating power of electrolytes having inos `Na^(o+),Al^(3+)` and `Ba^(2+)` for arsenic sulphide sol increases in the order

Options

A. `Ba^(2+)ltNa^(+)ltAl^(3+)`
B. `Al^(3+)ltNa^(+)ltBa^(2+)`
C. `Al^(3+)ltBa^(2+)ltNa^(+)`
D. `Na^(+)ltBa^(2+)ltAl^(3+)`

Answer

D

Explanation

Arsenic sulphate is negative sol hence, greter is the positive charge of cation, more will be its coagulating power.
`overset(Na^(+)ltBa^(2+)ltAl^(3+))underset("Increasing coagulation power ")to`