Chemistry Question Bank

If 20 cm3 gas at 1 atm. is expanded to 50 cm3 at constant T, then what is the final pressure ? (a) 20 50 x (b) 50 20 x (c) x x

A gas of volume 100 cc. is kept in a vessel at pressure 104 Pa maintained at temperature 24ºC if now the pressure is increased to 105 Pa, keeping the temperature constant, then the volume of the gas becomes

A gas at 298 K is shifted from a vessel of 250 cm3 capacity to that of 1L capacity. The final pressure of the gas will

300 ml of a gas at 27oC is cooled to –3oC at constant pressure, the final volume is

When gases are heated from 20 to 40ºC at constant pressure, their volumes

A sample of gas occupies 100 ml at 27oC and 740 mm pressure. When its volume is changed to 80 ml at 740 mm pressure, the temperature of the gas will be

A sample of gas has a volume of 0.2 lit measured at 1 atm pressure and 0oC. At the same pressure, but at 273K, its volume will become

A gas is initially at 1 atm pressure. To compress it to 1/4 th of its initial volume, assuming temperature to be constant pressure to be applied is

Gay-Lussac’s law of combining volume is applicable for those gases which on mixing :

The volume of ammonia obtained by the combination of 10 mL of N2 and 30 mL of H2 is :

What will be the minimum pressure required to compress 2 Litre of gas at 1 bar to 1 litre at 25oC?

A balloon is filled with hydrogen at room temperature. It will burst, if pressure exceeds 0.2 bar. If at 1 bar pressure the gas occupied 2.27 L volume, up to what volume can be balloon be expanded?

A relationship is obtained between density and pressure of a gas as follows

Which of the following represent Gay Lussac’s law? I. P constant T II. P T P T III. P V P V Choose the correct option.

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