Chemistry Question Bank

The weight of CH4 in a 9-L cylinder at 27oC temperature and 16 atm pressure is (R = 0.0821 L atm K–1 mol–1)

For an ideal gas ratio of P d is equal to:

If P, V, M, T and R are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the density is given by

The density of a gas at 27oC and 1 atm is d. Pressure remaining constant at which of the following temperatures will its density become 0.75 d?

Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mole litre–1 ? (R = 0.082 litre atm mol–1 deg–1)

The density of gas A is four times that of gas B. If the molecular weight of A is M, then at same pressure and temperature molecular weight of B is

The density of CCl4 vapour at 0ºC and 76 cm Hg in g/litre is:

The pressure of sodium vapour in a 1.0 L container is 10 torr at 1000ºC. How many atoms are in the container?

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