States of Matte...

At $$250^{o}C$$ and $$1$$ atmosphere pressure, the vapour density of $$PCI_{5}$$ is $$57.9$$ . What will be the dissociation of $$PCI_{5}-$$

If there unreactive gases having partial pressure $${P_A},{P_B}$$ and $${P_C}$$ and there moles are $$1,\,2$$ and $$3$$  respectively then their total pressure will be : 

A solution $$X$$ of $$A$$ and $$B$$ contains $$30$$ mole $$\%$$ of $$A$$ & is in equilibrium with its vapour that contains $$40$$ mole $$\%$$ of $$B$$. The ratio of $$V.P$$ of pure, $$A$$ and $$B$$ will be?

The vapour pressure of water at $$20^0C$$ is 17.54 mm. When 20 g of non-ionic, substance is dissolved in 100 g of water, the vapour pressure is lowered by 0.30 mm.What is the molecular weight of the substances.

Consider the following statements
a. Kinetic energy of a molecule is zero at $$0^0C$$.
b. A gas in a  closed container will exert much higher pressure due to gravity at the bottom than at the top 
c. Between collisions, the molecules move in straight lines with constant velocities.
Choose the incorrect statement(s)

One gram molecule of any gas at $$NTP$$ occupies $$22.4\ L$$. This fact was derived from:

Which of the following sets of variables give a staright line with negative slope when plotted ?
( P = Vapour pressure ; T = Temperature in K)
y- axis x -axis y -axis x-axis

The sample of neon gas heated from 300 K to 390 K, percentage increases in K.E is:

Equal amounts of two gases of molecular mass 4 and 40 are mixed. the pressure of the mixture is 1.1 atm. The partial pressure of the light gas in this mixture is :

Mole fraction of A vapours above the solution in mixture of A and B ($$X_A=0.4$$)will be 
[Given : $${ P }_{ A }^{ 0 }=100mmHg\quad and\quad { P }_{ B }^{ 0 }=200mmHg$$]