Chemistry-Raoult's Law
NEET Chemistry Raoult's Law MCQ Question
Type: MCQ-numerical-Medium-Class 12
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?
A
50 mmHg
B
20 mmHg
C
40 mmHg
D
10 mmHg
Correct Answer
Option A
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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