States of Matte...

Which of the following relationships is valid?

Which of the following statement is not a postulate of kinetic molecular theory of gases?

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is $$1:4$$. The ratio of the number of their molecule is _______.

For which of the following binary solution $${P}_{Total}={P}_{A}^{o}\times {X}_{A}+ {P}_{B}^{o}\times {X}_{B}$$ is followed?

Which gas does have density $$1,58$$ by air?

The mass of glucose that should be dissolved in $$100g$$ water in order to produce same lowering of vapour pressure as produced by dissolving $$1g$$ urea in $$50g$$ of water is?

In a gaseous mixture at 4 atm pressure, 25% of molecules are Nitrogen, 40% of molecules  are carbon dioxide and the rest are oxygen. The partial pressure of oxygen in the mixture is:

The vapour pressure is least for?

How many grams of sucrose must be added to $$320g$$ of water to lower the vapour pressure by $$1.5mm$$ $$Hg$$ at $${25}^{o}C$$?
(Given: The vapour pressure of water at $${25}^{o}C$$ is $$23.8mm$$ $$Hg$$ and molar mass of sucrose is $$324.3g/mol$$)

The vapour pressure of a liquid decreases by $$10 torr$$ when a non-volatile solute is dissolved. The mole fraction of the solute in solution is $$0.1$$. What would be the mole fraction of the liquid if the decrease in vapour pressure is $$20torr$$, the same solute being dissolved?