NEET 2016 Chemistry Raoult's Law MCQ Question
Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is CORRECT? Assume that the temperature is constant at 25°C. (Given: Vapour pressure data at 25 °C, benzene = 12.8 kPa, toluene = 3.85 kPa)
The vapour will contain equal amounts of benzene and toluene.
Not enough information is given to make a prediction.
The vapour will contain a higher percentage of benzene.
The vapour will contain a higher percentage of toluene.
Correct Answer
Detailed Explanation
According to Raoult's law, the component with the higher vapor pressure (benzene) will have a higher mole fraction in the vapor phase.
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