Relative lowering in vapour pressure of solution containing non-volatile solute is directly proportional to mole fraction of solute. Above statement is

Options

A. Henry law
B. Dulong and Petit law
C. Raoult's law
D. Le-Chatelier's principle

Answer

C

Explanation

According to Raoult's law, V.P. of a solution containing a non-volatile solute, B.
`P_(s)=x_(A)xxP^(@)`
where, `x_(A)` = mole fraction of solvent, `P^(@)` = V.P. of pure solvent
`P_(s)=(1-x_(B))P^(@)`
where `x_(B)` = mole fraction of solute
`(P^(@)-P_(B))/(P^(@))=x_(B)`