alleryA vapour pressure lower than predicted means the solution shows:
AConstant boiling
BNegative deviation
CPositive deviation
DIdeal behaviour
Answer & Solution
Correct answer: B. Negative deviation
1. Raoult's law gives a predicted vapour pressure.
2. The measured value here comes out below that prediction.
3. This is a negative deviation from Raoult's law.
_Source: syllabus Chemistry Part I, Chapter 2, Solutions._
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