Vapour pressure — temperature curves of pure solvent and solution containing a non-volatile solute are depicted in the figure aside. Select the correct statements(s) of the following

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Gap ab represents K_bm for the solution

Curves I and II represent the variation of vapour pressures of solvent and solution respectively with temperature

Curve I represents variation of vapour pressure of solution and II that of solvent with temperature

Gap ab represents elevation in boiling point ( $∆ T_{b}$ ) for the solution

answer is B, C, D.

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Detailed Solution

Vapour pressure of solution containing non volatile solute is always less than that of solvent.This is due to decrease in chemical potential when solute is added to solvent to prepare solution. Gap ab represents elevation in boiling point because points ‘’a'' and ‘’b'' represents boiling point of solvent and solution respectively. when solute is added to solvent boiling point increases.

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