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Which of the following statements are correct:
a) the boiling point of a solution is greater than pure solvent
b) the temperature where the vapour pressure of liquid equals to atmospheric pressure is called its boiling point
c) the vapour pressure of pure solvent is less than the vapour pressure of solution containing non volatile solute.
d) the temperature of liquid remained in the container after evaporation is more than before the evaporation

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a, b

b, c

c, d

a, d

answer is A.

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Detailed Solution

The vapour pressure of a pure solvent is higher than that of a solution containing a nonvolatile solute.

During evaporation, liquid molecules on the surface are converted to gas, which absorbs heat from the surface and lowers the temperature of the remaining liquid.

So, the required solution is option A) a,b

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