Which statement about the composition of vapour over an ideal `1 : 1` molar mixture of benzene and toluene is correct ? Assume the temperature is constant at `25^(@)C`
Vapour pressure data `(25^(@)C)`:
`{:("Benzene",75 mm Hg,),("Toluene",22 mm Hg,):}`

Options

A. The vapour will contain higher precentage of benzene
B. The vapour will contain higher precentage of toluene
C. The vapour will contain equal amount of benzene and toluene
D. Not enough information is given to make a prediction

Answer

B

Explanation

`V = (W ("mass"))/(d) = (205.5)/(0.79) = 260.13 mL`
`M = (w_(B) xx 1000)/(m_(B) xx V)`
`= (5.5 xx 1000)/(36.5 xx 260.13) = 0.58 M`