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An open beaker containing a pure solvent...

An open beaker containing a pure solvent and a seconf beaker containing a solution in the same solvent with a non-volatile solute are sealed in a container. Over the period of time

A

the volume of solution increases and the volume of solvent decreases

B

the volume of both solution and solvent increases

C

the volume of solution decreases while volume of solvent increases

D

the volume of both solution and solvent decreases

Text Solution

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The correct Answer is:
A
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Explore conceptually related problems

Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non volatile solute are together sealed in a container. Over time:

Abhinav is a student of class IX. One day all the students were performing experiments in the science laboratory. Just then, the chemistry teacher, Mrs. Prasad, came to the laboratory. She had three beaker in her hands labelled A, B and C. All the beakers contained colourless liquids which looked exactly the same. Mrs. Prasad turned to the students and said that one of the beakers contained a pure substance whereas the other two beakers contained solutions of the same solute in the same solvent but different concentrations. She also told the students that the weight one of the three beakers A, B and C were 110g, 120g and 100g respectively. Mrs. Prasad wanted one of the students to find out experiementally which beaker contained a pure substance and which two beakers contained solutions. She also wanted them to show experimentally two properties which could tell why the solutions are considered mixtures, even though they are homogeneous substances. Mrs. Prasad wanted one of the the students to find out experimentally which beaker contained a pure substance and which two beakers contained solutions. She also wanted them to show experimentally two properties which could tell why the solutions are considered mixtures, even though they are homogeneous substances. Mrs. Prasad allowed them to use any required apparatus from the laboratory for the purpose. Abhinav offered to perform the experiements to distinguish between the pure substance and solutions and also to show experimentally why solutions are considered mixtures. (a) What did Abhinav do to find out which of the given liquids is a pure substances and which liquids are solutions ? What were the observations made by Abhinav ? (b) Whay did Abhinav conclude form the above observations ? (c) Which property of the pure substance is exhibited by this experiment ? (d) Which properties of a solution are exhibited in this experiement ? (e) What values are displayed by Abhinav in this episode ?

Knowledge Check

  • When non-volatile solute is assed to a pure solvent, the:

    A
    vapour pressure of the solution becomes lower than the vapour pressure of the pure solvent
    B
    rate of evaporation of solvent is reduced
    C
    solute does not affect the rate of condensation
    D
    none of these

  • Effect of adding a non-volatile solute to a solvent is

    A
    to lower the vapoure pressure
    B
    to increases its freezing point
    C
    to increases its boiling point
    D
    to decreass its osmotic pressure

  • Addition of a non-volatile solute in a volatile ideal solvent

    A
    Increases the vapoure pressure of the solvent Decreases the vapour pressure of the solvent
    B
    Decreases the vapoure pressure of the solvent
    C
    Decreases the boililng point of the solvent
    D
    Increases the freezing point of the solvent

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    Give an example of a solution containing a liquid solute in a solid solvent.

    State Raoult's law for solution containing non-volatile solute.

    Write Raoult's law for a solution containing (alpha) volatile solute and (b) non-volatile solute.

    V.P. of a solution containing non-volatile solute is

    Vapour pressure of a solvent containing nonvolatile solute is:

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