In the fcc structure, the number of tetrahedral holes per sphere is

For a binary solution, when a nonvolatile nonelectrolyte solute is dissolved in solvent, the vapour pressure of solvent decreases by 20 % . what is mole fraction of solvent in solution ?

Calculate the boiling point of an aqueous solution containing 18 g glucose in 100 g water if the molal elevation constant of water is $0.5\ \text{K kg mol}^{-1}$.
[Molar mass of glucose $= 180\ \text{g mol}^{-1}$ and boiling point of water $= 100\ ^\circ\text{C}$]

Which of the following is the colligative property of a solution?