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  4. The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3 are given below: I. (NaCl) = 52, II. (BaCl2) = 0.69, III. (MgSO4) = 0.22 The correct order of the their coagulating power is

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Q. The coagulation values in millimoles per litre of the electrolytes used for the coagulation of $As_2S_3$ are given below :
I. $(NaCl) = 52$,
II. $(BaCl_2) = 0.69$,
III. $(MgSO_4) = 0.22$
The correct order of the their coagulating power is

NEETNEET 2016Surface Chemistry

Solution:

Coagulation power $\propto \frac{1}{\text{Coagulation values}}$
Higher the coagulation power, lower is the coagulation values in millimoles per litre.
$MgSO_4 > BaCl_2 > NaCl$