A) the lowering of vapour pressure is equal to the mole fraction of the solute
B) the relative lowering of vapour pressure is equal to the mole fraction of solute
C) the relative lowering of vapour pressure is equal to the amount of the solution
D) the vapour pressure of the solution, is equal to the mole fraction of the solvent
Correct Answer: B
Solution :
According to Raoult's law,\[\frac{{{p}^{o}}-p}{p}={{\chi }_{A}}\] where,\[\frac{{{p}^{o}}-p}{p}=\]relative lowering of vapour pressure \[{{\chi }_{A}}=\] mole fraction of solute
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