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In the depression of freezing point expe...

In the depression of freezing point experiment, it is found that the:

A

The vapour pressure of the solution is less than that of pure solvent.

B

The vapour pressure of the solution is more than that of pure solvent.

C

Only solute molecules solidify at freezing point.

D

Only solvent molecules solidify at freezing point.

Text Solution

Verified by Experts

The correct Answer is:
A, D
In the depression in freezing point experiment, it is found that the vapour pressure of a solution is less than that of pure solvent. Only solvent molecules solidify at freezing point. The temperature at which the vapour pressure of the liquid is equal to the vapour pressure of the solid is graphically the temperature at which the vapour pressure curve of the solid. When a non-volatile solute is dissolved in a liquid, its freezing point is lowered.
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The two isomers X and Y with the formula Cr(H_(2)O)_(5)ClBr were taken for experiment on depression in freezing point. It was found that one mole of X gave depression corresponding to 2 moles of particles and one mole of Y gave depression to 3 moles of particles. The structural formulae of X and Y raspectively are

Knowledge Check

  • In the depression of freezing point experment, it is found that

    A
    The vapour pressure of the solution is less than that of pure solvent
    B
    The vapour pressure of solution is more than the pure sovent
    C
    Only the solute molecules solidify at the freezing point
    D
    Only the solvent molecules solidify at the freezing point.

  • In the depression of freezing point experiment , it is found that : (P) the vapour pressure of the solution is less than that of pure solvent . (Q) the vapour pressure of the solution is more than that of pure solvent . (R) only solute molecules solidify at the freezing point . (S) only solvent molecules solidify at the freezing point .

    A
    P,Q
    B
    Q,R
    C
    P,S
    D
    P,Q,R

  • In the depression of freezing point experimet, it is found that: I. The vapour pressure of the solution is less than that of pure solvent. II. The vapour pressure of the solution is more than that of pure solvent. III. Only solute molecules solidify at the freezing point. IV. Only solvent molecules solidify at the freezing point.

    A
    I,II
    B
    II,III
    C
    I,IV
    D
    I,II,III.

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    MX_(2) dissociates into M^(2+) and X^(-) ions in an aqeous solution, with a degree dissociation (alpha) of 0.5. The ratio of the observed depression of freezing point of the aqueous solution to the value of the depression of freezing point in the absence of ionic dissociation is

    MX_(2) dissociates into M^(2+) and X^(-) ions in an aqueous solution with a degree of dissociation (alpha) of 0.5. The ratio of the observed depression of freezing point of the aqueous solution to the value of the depression of freezing point in the absence of ionic dissociation is

    The depression of freezing point is directly proportional to

    Cryoscopic constant is the depression in freezing point produced by :

    Statement - I. Greater the molal depression constant of the solvent used less in the freezing point of the solution. Statement - II. Depression in freezing point depends upon the nature of the solvent.

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