alleryA vapour pressure higher than predicted means the solution shows:
APositive deviation
BNegative deviation
CIdeal behaviour
DConstant boiling
Answer & Solution
Correct answer: A. Positive deviation
1. Raoult's law gives a predicted vapour pressure.
2. The measured value here comes out above that prediction.
3. This is a positive deviation from Raoult's law.
_Source: syllabus Chemistry Part I, Chapter 2, Solutions._
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