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A negative deviation from Raoult's law indicates
Aweaker A-B interactions than A-A and B-B
Bidentical interactions
Cstronger A-B interactions than A-A and B-B
Dno interaction at all
Answer & Solution
Correct answer: C. stronger A-B interactions than A-A and B-B
1. Negative deviation: actual vapour pressure is less than predicted by Raoult.
2. This happens when A-B attractions are stronger than the average of A-A and B-B.
3. Example: chloroform + acetone.
_Source: Maharashtra Balbharati Std XII Chemistry, Ch 2 "Solutions" §2.5_
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