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Question
Assertion (A) : Osmotic pressure is a colligative property.
Reason (R) : Osmotic pressure is proportional to the molality.
Options
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
Solution
(A) is true, but (R) is false.
Explanation:
Assertion is correct because osmotic pressure is a colligative property but reason is incorrect because osmotic pressure of a solution at any temperature T depends on the molar concentration not on molality.
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