Chemistry Question Bank

The rate of diffusion of methane at a given temperature is twice that of a gas X. The molecular weight of X is

A certain gas effuses through a small opening of a vessel at a rate which is exactly one-fifth the rate at which helium does the same. Thus, the molecular weight of the gas is

In a closed room of 1000 m3, a perfume bottle is opened up. The whole room develops smell. This is due to which property of gases ?

A bottle of ammonia and a bottle of dry hydrogen chloride connected through a long tube are opened simultaneously at both ends, the white ammonium chloride ring first formed will be

If helium and methane are allowed to diffuse out of the container under the similar conditions of temperature and pressure, then the ratio of rate of diffusion of helium to methane is

When T, P, and M represent rate of diffusion pressure and molecules mass, respectively, the ratio of the rate of diffusion / A B T T of two gases A and B, is given as

The rate of diffusion of methane at a given temperature is thrice that of a gas X. The molecular weight of X is

At what temperature will the molar KE of 0.3 mol of He be the same as that of 0.4 mol of argon at 400 K ?

Consider three one-litre flasks labeled A, B and C filled with the gases NO, NO2, and N2O, respectively, each at STP. In which flask do the molecules have the highest average kinetic energy?

If a gas expands at constant temperature, it indicates that

As the temperature is raised from 20ºC to 40ºC, the average kinetic energy of neon atoms changes by a factor of which of the following ?

According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels

Based on kinetic theory of gases following laws can be proved

According to kinetic theory of gases, for a diatomic molecule

Helium atom is two times heavier than a hydrogen molecule .At 298 K, the average kinetic energy of a helium atom is

Which is not true in case of an ideal gas ?

The rms speed of N2 Molecules in a gas sample can be changed by

By which factor does the root mean square velocity of a gaseous molecule increases, when the temperature is increase from 273 K to 1092 K.

Root mean square velocity of a gas molecule is proportional to

The ratio among most probable velocity, mean velocity and root mean square velocity is given by

The root mean square speeds at STP for the gases H2, N2, O2 and HBr are in the order :

The temperature of the gas is raised from 27ºC to 927ºC, the root mean square velocity is (a) 927 / 27 times the earlier value

According to kinetic theory of gases, the root mean square velocity is directly proportional to

The pressure of real gases is less than that of ideal gas because of

For a gas deviation from ideal behaviour is maximum at :