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Question
According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.
Options:
A .  No component is concentrated at the surface of the solution
B .  The component molecules are non polar and are of almost equal size
C .  In the formation of solution, chemical combination/molecular association between unlike molecules takes place
D .  The attractive forces between like and unlike molecules are almost equal
Answer: Option C

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