NEET 2006 Chemistry question

A solution of acetone in ethanol:-

(1)Shows a negative deviation from Raoult's law
(2)Shows a positive deviation from Raoult's lawCorrect
(3)Behaves like a near ideal solution
(4)Obeys Raoult's law

Answer: (2)

Solution

Pure ethanol has strong intermolecular hydrogen bonding. When acetone (which cannot form H-bonds with itself) is added, it breaks some of the hydrogen bonds of ethanol, so the solute-solvent interactions are weaker than the interactions in the pure components. The escaping tendency increases and the

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Question ID VK-089618