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Solutions question

2006 · Q94
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Solutions question

2006 · Q94

NEETChemistrySolutionsMCQ+4 / −1
A solution of acetone in ethanol
  1. A
    obeys Raoult's law
  2. B
    shows a negative deviation from Raoult's law
  3. C
    shows a positive deviation from Raoult's law
  4. D
    behaves like a near ideal solution.
View written solutionFree

Correct answer: C

A solution of acetone in ethanol shows positive deviation from Raoult's law. It is because ethanol molecules are strongly hydrogen bonded. When acetone is added, these molecules break the hydrogen bonds and ethanol becomes more volatile. Therefore its vapour pressure is increased.

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