Under the influence of an electric field, the particles in a sol migrate towards the 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. The coagulating values will be highest for:

N a C l

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N a_{2} S O_{4}

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N a_{3} P O_{4}

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Solution

The correct option is A $N a C l$
The sol particles migrate towards the cathode which is negatively charged, so they must be positively charged. Hence, adding anions would help in coagulation. Greater the valency of anions, lower will be its coagulating value.

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Under the influence of an electric field, the particles in a sol migrate towards the cathode. The coagulation of the same sol is studied using NaCl,Na2SO4 and Na3PO4 solutions. The coagulating values will be highest for:

The correct option is A NaClThe sol particles migrate towards the cathode which is negatively charged, so they must be positively charged. Hence, adding anions would help in coagulation. Greater the valency of anions, lower will be its coagulating value.

Under the influence of an electric field, the particles in a sol migrate towards the 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. The coagulating values will be highest for:

The correct option is A $N a C l$
The sol particles migrate towards the cathode which is negatively charged, so they must be positively charged. Hence, adding anions would help in coagulation. Greater the valency of anions, lower will be its coagulating value.