Question

The relative lowering of vapour pressure is equal to the mole fraction of the solute. This law is called

• A. Henrys law
• B. Raoults law
• C. Ostwalds law
• D. Arrhenius law

Answer 1

Answer: (B)

Raoults law

Answer 2

According to Raoult?? law, for dilute solutions containing non volatile solute, the relative lowering of vapor pressure, $\frac{\triangle P }{ P _{ o }}$ is equal to the mole fraction of solute, $X _{2}$.