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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

`Al^(3+) lt Ba^(2+) lt Na^(+)`

B

`Na^(+) lt Ba^(2+) lt Al^(3+)`

C

`Ba^(2+) lt Na^(+) lt Al^(3+)`

D

`Al^(3+) lt Na^(+) lt Ba^(2+)`

Text Solution

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The correct Answer is:
B
According to Hardy Schulze rule, greater the charge on cation, greater is its coagulating power for negatively charged solution. So, order of coagulating power : `Na^(+) lt Ba^(2+) lt Al^(3+)`.
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