When 5 grams of a solute is added to 90gm of water,its vapour pressure decreased from 30mm to 27mm . The mole fraction of the solvent in the solution is

If mole fraction of the solvent in a solution decreases than:

The vapour pressure of pure liquid solvent A is 0.80 atm . When a non-volatile substance B is added to the solvent, its vapour pressure drops to 0.60 atm , the mole fraction of component B in the solution is

At 300 K , when a solute is aded to a solvent ,its vapour pressure over mercury reduces from 50 mm to 45 mm . The value of mole fraction of solute wil be _____.

Vapour pressure of benzene at 30^(@)C is 121.8 mm. When 15 g of a non-volatile solute is dissolved in 250 g of benzene its vapour pressure decreased to 120.2 mm. The molecular weight of the solute is (mol. Weight of solvent = 78)

64 g non - volatile solute is added to 702 g benzene. The vapour pressure of benzene has decreased from 200 mm of Hg to 180 mm of Hg. Molecular weight of the solute is

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.

90 g non - volatile, non - dissociative solution is added to 1746 g water to form a dilute, ideal solution. The vapour pressure of water has decreased from 300 mm of Hg to 291 mm of Hg. The molecular weight of solute is.

1.2 g of a non-volatile solute is added to 320 g of methyl alcohol at certain temperature. The vapour pressure is decreased from 400 mm to 399.2 mm Hg. Calculate the molecular weight of solute.

A solution containing 30 g of a non-volatile solute in exactly 90 g of water has a vapour pressure of 21.85 mm of 25^(@)C . Further 18 g of water is then added to the solution, the new vapour pressure becomes 22.15 mm of Hg at 25 C . Calculate the (a) molecular mass of the solute and (b) vapour pressure of water at 25^(@)C .

The vapour pressure of water at 20^(@)C is 17.54mm . When 20g of non - ionic substance is dissolved in 100g of water, the vapour pressure is lowered by 0.30mm . What is the molecular mass of the substance ?