JEE Main 2026 Chemistry question
When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was x% of vapor pressure of pure solvent. What is x%?
Answer: (D)
Solution
By Raoult's law, p/p° = mole fraction of solvent = 1/(1+0.25) = 0.8, i.e. 80%.