JEE Main Chemistry question

At , the highest osmotic pressure is exhibited by 0.1 M solution of [RPET 2010]

(A)Decinormal aluminium sulphateCorrect
(B)Decinormal barium chloride
(C)Decinormal sodium chloride
(D)A solution obtained by mixing equal volumes of (b) and (c) and filtering

Answer: (A)

Solution

Aluminium sulphate, Al_2(SO_4)_3\to2Al^{3+}+3SO_4^{2-}, produces 5 ions per formula unit, far more than barium chloride (3 ions) or sodium chloride (2

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Question ID VK-143071