One molar solution of sodium chloride will have the relative lowering of vapour pressure closest to :

Options

A. 5.8% (wt./vol) urea solution (M.M.=60)
B. 5.8 % (wt./vol) glucose solution (M.M.=180)
C. 1.0 M glucose solution (M.M. = 180)
D. 2.0 M urea solution (M.M.=60)

Answer

D

Explanation

`(P_(1)^(@)-P)/P_(1)^(@)=n/(n+N)`
mole fraction of NaCI and urea should be same.