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Kohlrausch Law

Under the inf...

Question

Under the influence of an electric field the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using $N a C l$ , $N a_{2} S O_{4}$ and $N a_{3} P O_{4}$ solutions. Their coagulation values will be in maximum for

A

N a C l

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B

N a_{2} S O_{4}

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C

N a_{3} P O_{4}

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D

Same for all.

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Solution

The correct option is B $N a C l$
The sol particles migrate towards cathode. So they are positively charges. Hence, anions would be effective in coagulation. Greater is the valence of effective ion, smaller will be its coagulating value.

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