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QNEET-2016-Ch-1045: NEET 2016 Chemistry - Class 12 NEET-2016-Ch-1045 Solution: Which of the following statements about the composition of the…
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 . (Given vapour pressure data at 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
Multiple Choice Options
- A The vapour eill contain equal amounts of benzene and toluene.
- B Not enough information is given to make a prediction.
- C The vapour will contain a higher percentage of benzene.
- D The vapour will contain a higher percentage of toluene
Step-by-Step Verified Solution
p Benzene = x Benzene . p o Benzene
p Toluene = x Toluene . p o Toluene
For an ideal 1 : 1 molar mixture of benzene and
toluene
x Benzene = 1 2 and x Toluene = 1 2
p Benzene = 1 2 p o Benzene = 1 2 _ 12.8 = 6.4 kPa
p Toluene = 1 2 p o Toluene = 1 2 _ 3.85 = 1.925 kPa
Thus, the vapour will contain a high percentage of
benzene as the partial vapour pressure of benzene
is higher as compared to that of toluene.