HARD
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The composition of the equilibrium mixture for the equilibrium Cl22Cl at 1470 K diffuses 1.16 times as fast as Krypton (84) under the same conditions. Find the degree of dissociation of Cl2 at equilibrium.

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Important Questions on States of Matter: Gases and Liquids

MEDIUM
The ratio of rates of diffusion of oxygen and an unknown gas is 1: 4. The unknown gas is
EASY
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escape in the time required for one-half of the hydrogen to escape?
MEDIUM
Two gases A and B are released from the two ends of a tunnel of length 100 m. A travels 40 min, before meeting the gas B in the tunnel. If the molecular weight of B is 18 , what is the molecular weight of A ?
MEDIUM
Which of the following statement(s) (are) correct regarding the root-mean-square speed Urms and average translational kinetic energy Eav of a molecule in a gas at equilibrium?
MEDIUM
Diffusion of CH4 (g) and O2 (g) occurs under similar conditions, then the ratio of their rates of diffusion is
MEDIUM
A gas molecule of mass M at the surface of the earth has kinetic energy equivalent to 0 °C. If it were to go up straight without colliding with any other molecules, how high would it rise? Assume that the height attained is much less than the radius of the earth. (kB is Boltzmann constant)
MEDIUM
The rate of diffusion of methane at a given temperature is twice that of gas X. The molecular weight of gas X is
HARD

Benzene and toluene form an ideal solution over the entire range of composition. The vapour pressure of pure benzene and toluene at T K are 50 mmHg and 40 mmHg, respectively. What is the mole fraction of toluene in vapour phase when 117 g of benzene is mixed with 46 g of toluene?

(Molar mass of benzene and toluene are 78 and 92 g mol-1, respectively)

HARD
10 litre cylinder contains equal volumes of H2 and He. If the mixture is allowed to diffuse from an opening, estimate the percent composition of the output gas. (Assume ideal behaviour of gas mixture)
EASY
At same temperature and pressure, the rate of diffusion of gas 'X' is 33 times that of a gaseous hydrocarbon of molar mass 54 g mol-1. The molar mass of X in g mol-1 is
MEDIUM
The change in the magnitude of the volume of an ideal gas when a small additional pressure P is applied at a constant temperature, is the same as the change when the temperature is reduced by a small quantity T at constant pressure. The initial temperature and pressure of the gas were 300 K and 2 atm respectively. If  |ΔT|=C|ΔP| then value of C in (K/atm)  is __________
EASY
According to Graham's Law, the rate of diffusion of CO, O2, N2 and CO2 follows the order:
MEDIUM
The kinetic energy in J of 1 mole of N2 at 27°C is: R=8.314 J mol-1 K-1
MEDIUM
Which of the following is not an assumption of the kinetic theory of gases?
MEDIUM
What is the kinetic energy (in ergs) of the nitrogen molecule at -73°C?
MEDIUM
A cylindrical container of volume 4.0×10-3 m3 contains one mole of hydrogen and two moles of carbon dioxide. Assume the temperature of the mixture is 400 K. The pressure of the mixture of gases is :
[Take gas constant as 8.3 J mol-1 K-1
MEDIUM
The volume V of an enclosure contains a mixture of three gases, 16 g of oxygen, 28 g of nitrogen and 44 g of carbon dioxide at absolute temperature T. Consider R as universal gas constant. The pressure of the mixture of gases is :
EASY
Sulphur dioxide and oxygen were allowed​ to diffuse through a porous partition. 20 dm3 of SO2 diffuses through the porous partition in 60 seconds. The volume of O2 in dm3 which diffuses under the similar condition in 30 seconds will be (atomic mass of sulphur= 32 u);
EASY
A specific volume of H2 requires 24 s to diffuse out of a container. The time required by an equal volume of O2 to diffuse out under identical conditions, is