MHT CET 2025 Chemistry question

Arrange the following equimolar solutions according to increasing order of osmotic pressure [ Assume complete ionisation] A. KCl B. C. D.

(A)BaCl_2 < Al_2(SO_4)_3 < KCl < AlCl_3
(B)Al_2(SO_4)_3 < KCl < BaCl_2 < AlCl_3
(C)KCl < BaCl_2 < AlCl_3 < Al_2(SO_4)_3Correct
(D)AlCl_3 < Al_2(SO_4)_3 < KCl

Answer: (C)

Solution

For equimolar solutions, , so osmotic pressure is proportional to the van't Hoff factor (number of ions per formula unit on complete ionisation). KCl : . : . $

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Question ID VK-102671