Chemistry Question Bank

Dry ice is solid carbon dioxide. A 0.050 g sample of dry ice is placed in an evacuated 4.6 L vessel at 30ºC. Calculate the pressure inside the vessel after all the dry ice has been converted to CO2 gas.

The closed containers of the same capacity and at the same temperature are filled with 44g of H2 in one and 44g of CO2 in the other. If the pressure of carbon dioxide in the second container is 1 atm. That of hydrogen…

For an ideal gas, number of moles per litre in terms of its pressure P, temperature T and gas constant R is

The density of neon will be highest at

In a mixture of gases, the pressure exerted by the individual gas is called

A gaseous mixture is the mixture of 2 moles of A and 3 moles of B. Total pressure of the mixture is 5 atm. What is the partial pressure of A and B respectively?

The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere, what would be the partial pressure of dioxygen? (a) 0.8 10 atm x

Same amount of hydrogen H2(g) and CH4(g) are mixed in a vessel at 25oC. The fraction of the total pressure exerted by hydrogen is

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

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 :

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

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

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

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

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

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

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

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

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 …

If the ratio of the rates of diffusion of two gases. A and B is 4:1, the ratio of their densities is

If the ratio of the rates of diffusion of two gases. A and B is 2:1, the ratio of their densities is

The atomic weight of C, N and O are 12, 14 and 16 respectively. Among the following pair of gases, which will diffuse at the same rate?

2 moles of each H ,SO and CH are kept in a container. A hole was made in the container. After 30 min, 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 …

When r, P and M represent rate of diffusion, pressure and molecules mass, respectively, the ratio of the rate of diffusion (rA/rB) of two gases A and B, is given as