Which of the following liquid pairs shows a positive deviation from Raoult’s law?
Water hydrochloric acid
Benzene methanol
Water nitric acid
Acetone chloroform.
As we learnt in
Condition for positive deviation -
When A - A interactions and B - B interactions are stronger than A - B interactions.
e.g. Ethanol + water
- wherein
When Benzene - Benzene interaction and Methanol - Methanol interaction are stronger than Benzene - Methanol interaction then solution shows positive deviation.
Correct option is 2.
Option 1)
Water hydrochloric acid
This is an incorrect option.
Option 2)
Benzene methanol
This is the correct option.
Option 3)
Water nitric acid
This is an incorrect option.
Option 4)
Acetone chloroform.
This is an incorrect option.
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