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Chemistry · 2025 · 2 marks
CBSE 2025 · Region 7 · Set 2 · Q17
What is meant by negative deviation from Raoult's law? Give an example. What type of azeotrope is formed by negative deviation?
What is meant by negative deviation from Raoult's law ? Give an example. What type of azeotrope is formed by negative deviation ?
Marking-scheme solution
When vapour pressure of the solution is lower than expected from the ideal behaviour.
Example : chloroform and acetone/ HNO3 and water
Maximum boiling azeotrope
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CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.