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The coagulating power of electrolytes ha...

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

A

`Na^(+)ltBa^(2+)ltAl^(3+)`

B

`Ba^(2+)ltNa^(2+)ltAl^(3+)`

C

`Al^(3+)ltNa^(+)ltBa^(2+)`

D

`Al^(3+)ltBa^(2+)ltNa^(+)`

Text Solution

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The correct Answer is:
A
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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+)

The coagulation power of an electrolyte for As_(2) S_(3) decreases in the order:

Knowledge Check

  • Assertion : In the coagulation of a negative sol the flocculating power is in the order : Al^(3+) gt Ba^(2+) gt Na^(+) Reason : Greater the valence of the flocculating ion added, greater is its power to cause precipitation.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false
    D
    if both assertion and reason are false

  • Mixing of positively charged colloidal solution with negatively charged colloidal solution brings __________. The decreasing order of coagulating power of Na^(+), Ba^(2+) and Al^(3+) for negatively charged colloidal solution is ________ .

    A
    mutual coagulation , `Na^(+) gt Ba^(2+) gt Al^(3+)`
    B
    mutual coagulation , `Al^(3+) gt Ba^(2+) gt Na^(+)`
    C
    coagulation , `Na^(+) gt Ba^(2+) gt Al^(3+)`
    D
    Peptization , `Al^(3+) gt Ba^(2+) gt Na^(+)`

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