1.

The coagulating power of electrolytes having inos `Na^(o+),Al^(3+)` and `Ba^(2+)` for arsenic sulphide sol increases in the orderA. `Na^(o+)ltBa^(2+)ltAl^(3+)`B. `Ba^(2+)ltNa^(o+)ltAl^(3+)`C. `Al^(3+)ltNa^(o+)ltBa^(2+)`D. `Al^(3+)ltBa^(2+)ltNa^(o+)`

Answer» Correct Answer - A
`As_(2)S_(3)` is an anionic sol (negative sol) hence coagulation will depend upon coagulation power of cation which is directly proportional to the valency of cation (Hardy-Schulze rule).


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