alleryA mixture of ethanol and acetone shows:
APositive deviation
BNegative deviation
CIdeal behaviour
DNo vapour pressure
Answer & Solution
Correct answer: A. Positive deviation
1. Pure ethanol molecules are held by hydrogen bonds.
2. Acetone gets between them and breaks some of those bonds.
3. The weakened interactions give a positive deviation.
_Source: syllabus Chemistry Part I, Chapter 2, Solutions._
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