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NEET2026Chemistry
Q.

Mixture of chloroform and acetone forms a solution with negative deviation from Raoult’s law due to :

  1. A

    stronger intermolecular forces between chloroform molecules than those between chloroform and acetone molecules

  2. B

    formation of hydrogen bonding between acetone and chloroform

  3. C

    repulsive forces

  4. D

    increase in escaping tendency of molecules of each component

Solution

Chloroform (CHCl) and acetone (CHCOCH) form a hydrogen bond between the C–H of chloroform and the carbonyl oxygen of acetone. This new interaction is stronger than the intermolecular forces in the pure components, lowering the vapour pressure and producing negative deviation from Raoult’s law.

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