The ratio of partial pressure of a gaseous component to the total vapour pressure of the mixture is equal to

This is about the Dalton’s Law of Partial Pressure. It states that the total pressure exerted by the mixture of gases is equal to the sum of the partial pressure of each individual gas. 1 2 3...... total n P P P P P The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas. i total i P P x Thus, the correct option is (b) mole fraction of the component.