Show that the relative lowering of vapour pressure is given by.
`(p^(0)-p)/(p^(0))=(W_(2)//M_(2))/(W_(1)//M_(1)+W_(2)//M_(2))`
where W and `W_(2)` are the weights and `M_(1)` and `M_(2)` are the molecular weights of solvent and solute respectively, `p^(0)` is the vapour pressure of pure solvent and p that of solution.

If P^(@) and P_(s) are vapour pressure of solvent and its solution, respectively, chi_(1) and chi_(2) are mole fractions of solvent and solute, respectively, then

Which of the following is the expression of Raoult’s law? ( p^(o) = vapour pressure of pure solvent, p^(s) = vapour pressure of the solution)

6.0 g of urea (molecular mass = 60) was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P^(@) , the vapour pressure of solution is :

A binary solution contains x_1 and x_2 mile fraction of two components having vapour pressure p_1^@ and p_2^@ in this pure states. The total vapour pressure above the solution is

The lowering of vapour pressure of 0.1 M aqueous solution NaCl, CuSO_(4) and K_(2)SO_(4) are :

Two 5 molal solutions are prepared by dissolving a non-electroylete, non -volatile solute separately in the solvents X and Y. The molecular weights of the solvents are M_(x) and M_(Y) , respectively where M_(X)=4/3M_(Y) . The relative lowering of vapour pressure of the solution in X is "m" times that of the solution in Y. Given that the number of moles of solute is very small in comparision to that of solvent, the value of "m" is :

Estimste the lowering of vapour pressure due to the solute (glucose) in a 1.0 M aqueous solution at 100^(@)C :

The mole fraction of the solvent in the solution of a non-volatile solute is 0.980. The relative lowering of vapour pressure is :

The vapour pressure at a given temperature of an ideal solution containing 0.2 mol of non-volatile solute and 0.8 mol of a solvent is 60 mm of Hg . The vapour pressure of the pure solvent at the same temperature will be

The vapour pressure of a pure liquid at 25^(@)C is 100 mm Hg. Calculate the relative lowering of vapour pressure if the mole fraction of solvent in solution is 0.8.