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The vapour pressure of a 5% aqueous sol...

The vapour pressure of a 5% aqueous solution of a non-volatile organic substances at 373K is 745 mm. calculate the molar mass of the solute. (Vapour pressure of water at 373K=760mm Hg).

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Knowledge Check

  • An aqueous solution of methanol has vapour pressure

    A
    Equal to that of water
    B
    equal to that of methanol
    C
    more than that of water
    D
    less than that of water

  • What happens to the vapour pressure of a liquid when a non-volatile solute is added to it

    A
    increases
    B
    decreases
    C
    remains same
    D
    first increases and then decreases

  • The vapour pressure of an aqueous solution of glucose is 750 mm of mercury at 100^@ C . Mole fraction of solute will be

    A
    0.103
    B
    0.013
    C
    0.025
    D
    0.45

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    A 5% solution of cane sugar (molar mass=342) is isotonic with 0.877% soluton of urea. Calculate the molar mass of urea.

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