Which of the following liquid pairs shows a negative deviation from Raoult's law?
A. Ethanol + water
B. Benzene + toluene
C. Acetone + chloroform
D. Carbon disulphide + acetone
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Best answer
Answer: C. Acetone + chloroform
Acetone and chloroform form hydrogen bonds with each other, so the A–B attraction is stronger than A–A and B–B. This gives a negative deviation.
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· 23 Oct 2026
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