The minimum flocculation (coagulating) power of KCl, MgCl _2, CrCl _3 and SnCl _4 for a negatively charged sol are in the order of

JEE Main Chemistry question

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The minimum flocculation (coagulating) power of KCl, , and for a negatively charged sol are in the order of

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

For a negatively charged sol, coagulation is brought about by the cation of the electrolyte, and the Hardy–Schulze rule states that the minimum concentration needed for coagulation (flocculation value) decreases sharply as the cationic charge increases. The cationic charges here are $K^+(+1) <

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Question ID VK-144893