Chemistry Question Bank

0.5 mole of each H2, SO2 and CH4 are kept in a container. A hole was made in the container. After 3 h, the order of partial pressure in the container will be (a) SO CH H P P P (b) H SO CH P P P (c) H CH SO P P P …

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

Equal weights of methane and oxygen are mixed in an empty container at 25ºC. The fraction of the total pressure exerted by oxygen is

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.

Equal weights of methane and hydrogen are mixed in an empty container at 25ºC. The fraction of the total pressure exerted by hydrogen is

Equal weights of ethane and hydrogen are mixed in an empty container at 25ºC. The fraction of the total pressure exerted by hydrogen is

A cylinder is filled with a gaseous mixture containing equal masses of CO and N2. The partial pressure ratio is : (a) N CO P P (b) CO N P 0.875 P (c) CO N P 2 P (d) CO N P 1/ 2 P

16 gm of oxygen and 3 gm of hydrogen are mixed and kept in 760 mm presusre at 0oC. The total volume occupied by the mixture will be nearly

Equal weights of two gases of molecular weight 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

The ratio of partial pressure of a gaseous component to the total vapour pressure of the mixture is equal to

3.2 g of oxygen (At. wt. = 16) and 0.2 g of hydrogen (At. wt. = 1) are placed in a 1.12 litre flask at 0ºC. The total pressure of the gas mixture will be

Which of the following mixtures of gases does not obey Dalton’s law of partial pressure ?

If three unreactive gases having partial pressures PA, PB and PC and their moles are 1, 2, and 3 respectively then their total pressure will be :

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 :

Any gas shows maximum deviation from ideal gas at

Two separate bulbs contain ideal gases A and B. The density of gas A is twice that of gas B. The molecular mass of A is half that of gas B. The two gases are at the same temperature. The ratio of the pressure of A to …

In case of hydrogen and helium, the van der Waal’s forces are

A gas will approach ideal behaviour at

A close vessel contains equal number of nitrogen and oxygen molecules at a pressure of P mm. If nitrogen is removed from the system, then the pressure will be