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The coagulating power of electrolytes ha...

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

A

`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+)`

Text Solution

Verified by Experts

The correct Answer is:
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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The coagulating power of electrolytes having ions Na^(+),Al^(3+) and Ba^(2+) for aresenic sulphide sol increases in the order :-

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Statement- 1: In the coagulation of negatively charged arsenic sulphide sol, the coagulating power decreases in the order Al^(3+) gt Ba^(2+) gt Na^(+) . Statement- 2: Generally greater the valency of coagulating ion, the greater is its power of coagulation.

Statement-1: In the coagulation of negatively charged arsenic sulphide sol, the coagulating power decreases in the order, Al^3gtBa^(2+)gtNa^+ Statement-2 : Generally greater the valence of coagulating ion, the greater is its power of coagulation.

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