NEET 2000 Chemistry question

Not in JEE Main or NEET syllabus

Which one of the following method is commonly used method for destruction of colloid :

(1)Dialysis
(2)Condensation
(3)Filteration by animal membrane
(4)By adding electrolyteCorrect

Answer: (4)

Solution

Destruction of a colloid means coagulation (precipitation) of the sol. The commonest method is the addition of an electrolyte: the ions carrying charge opposite to that of the colloidal particles neutralise it

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Question ID VK-088631