1.

According to Raoult's law the relative lowering of vapour pressure of a solution of non-volatile substance is equal to

Answer»

<P>Mole FRACTION of the solvent
Mole fraction of the solute
Weight PERCENTAGE of a solute
Weight percentage of solvent

Solution :`(p^(@)-p)/(p^(@))=((w)/(m))/((w)/(m)+(W)/(M))` = mole fraction of solute.


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