NEET Chemistry Raoult's Law MCQ Question
A solution of ethanol and acetone shows a positive deviation from Raoult’s Law. If the vapour pressure of pure ethanol at a certain temperature is 44 mmHg and that of pure acetone is 30 mmHg, what could be a possible vapour pressure of the solution?
50 mmHg
20 mmHg
40 mmHg
10 mmHg
Correct Answer
Detailed Explanation
According to the NCERT context, positive deviation from Raoult’s Law occurs when the intermolecular forces in the solution are weaker than those in the pure components. This results in a solution vapour pressure higher than expected, making a value like 50 mmHg plausible.
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