The vapour pressure of pure liquid solvent is 0.50 atm. When a non – volatile solute B is added to the solvent, its vapour pressure drops to 0.30 atm. Thus, mole fraction of component B is
A. 0.6
B. 0.25
C. 0.45
D. 0.75
Answer:A
The vapour pressure of pure liquid solvent is 0.50 atm. When a non – volatile solute B is added to the solvent, its vapour pressure drops to 0.30 atm. Thus, mole fraction of component B is
A. 0.6 B. 0.25 C. 0.45 D. 0.75