Q.

Select the correct statements.

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A liquid always boils, when its vapour pressure becomes equal to 1 atm

Elevation in boiling point is shown by the difference of boiling point of solution and boiling point of pure solvent

Ebullioscopic constant has the units K kg mol-1

Kb is same for the solvent of salt solution and sugar solution

answer is B.

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Detailed Solution

A liquid boils when its vapour pressure becomes equal to atmospheric pressure.∆Tb=Tb-Tbo=Kbmwhere, ∆Tb= Elevation in B.P,Tb=B.P of solution,Tbo= B.P of pure solvent,Kb= Ebullioscopic constant.

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