Question

Identify the law which is stated as: 

“For any solution, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.” 

(a) Henry’s law 

(b) Raoult’s law 

(c) Dalton’s law 

(d) Gay-Lussac's Law

Answer 1

Correct answer is (b) Raoult’s law 

For any solution, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.

p ∝ x

p = p° x

where p = partial vapour pressure,

 p° = Vapour pressure of pure component.

 x = mole fraction

Answer 2

Answer is (b) Raoult’s law