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Vapour pressure of a solution containing...

Vapour pressure of a solution containing a non volatile solute is

A

more than the vapour pressure of pure solvent

B

less than the vapour pressure of pure solvent

C

equal to the vapour pressure of the pure solvent

D

may be more or less than vapour pressure of the pure solvent depending upon whether the solution is dilute or concentrated.

Text Solution

Verified by Experts

The correct Answer is:
B
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For a non-volatile solute

The relative lowering of vapour pressure of an aqueous solution containing a non-volatile solute, is 0.0125. The molality of the solution is

Knowledge Check

  • Relative lowering in vapour pressure of solution containing non-volatile solute is directly proportional to mole fraction of solute. Above statement is for :

    A
    Henry Law
    B
    Dulong and Petit Law
    C
    Raoult's Law
    D
    Osmotic principle

  • The relative lowering of vapour pressure of a solution on the addition of non-volatile solute

    A
    Is equal to mole fraction of the solute
    B
    Is equal to the mole fraction of the solvent
    C
    Depends upon the nature of the solute
    D
    Depends upon the nature of the solute and solvent.

  • A 300 K the vapour pressure of an ideal solution containing 1 mole of liquid A and 2 moles of liquid B is 500 mm of Hg. The vapour pressure of the solution increases by 25 mm of Hg if one more mole of B is added to the above ideal solution at 300 K. Then vapour pressure of A in its pure state is :

    A
    300 mm of Hg
    B
    40 mm of Hg
    C
    500 mm of Hg
    D
    600 mm of Hg.

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