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Assertion : If a liquid solute more vola...

Assertion : If a liquid solute more volatile than the solvent is added to the solvent, the papour pressure of the solution may increase i.e. `p_s gt p^@.`
Reason In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

A

If both (A) and (R) are correct and (R) is the correct explanation of(A).

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C

If (A) is correct, but (R) is incorrect.

D

If both (A) and (R) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
C
Both the solute and solvent will form the vapours but vapour phase will become richer in the more volatile component.
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In the depression of freezing point experiment 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

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Knowledge Check

  • Statement 1: If a liquid solute more volatile than the solvent is added to the solvent, the vapour pressure of the solution may increase i.e, p_(s) gt p^(@) Statement 2: In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

    A
    Statement 1 is True, Statement 2 is true, Statement 2 is correct explanation for Statement 1
    B
    Statement 1 is True, Statement 2 is True, Statement 2 is NOT a correct explanation for Statement 1
    C
    Statement 1 is True, Statement 2 is False
    D
    Statement 1 is False, Statement 2 is True

  • Equimolar solutions of non ionic non volatile solute in the same solvent have

    A
    Same boiling point but different freezing point
    B
    Same freezing point but different boiling point
    C
    Same boiling and same freezing points
    D
    Different boiling and different freezing points

  • Statement 1: If more and more solute is dissolved in a certain amount of solvent, the freezing point of the solution keeps on reducing. Statement 2 Presence of large amount of dissolved non volatile solute does not allow the solution to freeze.

    A
    Statement 1 is True, Statement 2 is true, Statement 2 is correct explanation for Statement 1
    B
    Statement 1 is True, Statement 2 is True, Statement 2 is NOT a correct explanation for Statement 1
    C
    Statement 1 is True, Statement 2 is False
    D
    Statement 1 is False, Statement 2 is True

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