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Vapour-phase mole fraction over an equimolar mixture of benzene and methylbenzene

The same question, asked 2 times: 2021 Paper 11*, 9 Apr 2024. Every wording below, oldest first.

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  1. Question 1

    2021 Paper 11

    32
    Vapour pressure of benzene and methylbenzene are 70 and 20 respectively. Both are equimolar mixture. Find the mole fraction of benzene in vapour phase?

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  2. Question 2

    9 Apr 2024

    143
    The vapour pressure of pure benzene and methyl benzene at 27∘C27^{\circ}C is given as 80 Torr and 24 Torr, respectively. The mole fraction of methyl benzene in vapour phase, in equilibrium with an equimolar mixture of those two liquids (ideal solution) at the same temperature is _____ ×10−2\times10^{- 2} (nearest integer)