Pls solve

​Q55. The vapour pressure of water at room temperature is 23.8 mm of Hg. The vapour pressure of an aqueous solution of sucrose with mole fraction 0.1 is equal to :

        (1) 23.9 mm Hg                                         (2) 24.2 mm Hg

        (3) 21.42 mm Hg                                       (4) 31.44 mm Hg

Dear Student,

We know that, P°-PSP°= X2or, PS = P°(1-X2)or, PS=23.8 (1-0.1)          =23.8(0.9)          =21.42 mm of HgHence, correct answer is (3)

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