The concentration of electrolyte required to coagulate a given amount of As _2 S _3 sol is minimum in the case of

JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The concentration of electrolyte required to coagulate a given amount of sol is minimum in the case of

(A)Magnesium nitrate
(B)Potassium nitrate
(C)Potassium sulphate
(D)Aluminium nitrateCorrect

Answer: (D)

Solution

sol is negatively charged, so it is coagulated by cations, and a cation of higher charge coagulates the sol at a much lower concentration (Hardy–Schulze rule). Among

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Question ID VK-144787