The lowering of vapour pressure of the solvent takes place on dissolving a non-volatile solute because
The lowering of vapour pressure of the solvent takes place on dissolving a non-volatile solute because
A. the density of the solution increases
B. the surface tension of the solution decreases
C. the molecules of the solvent on the surface are replaced by the molecules of the solute
D. the mole fraction of solvent is less than 1
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Correct Answer - D
Vapour pressure does not depend upon surface area of a volatile liquid `(p)/(p^(@)) = x_("solvent")` In case of a solution `x_("solvent") lt 1`.
`:. p lt p^(@)`.
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