Chemistry Question Bank

Avogadro’s law is the combination of I. Charles’ law. II. Boyle’s law. III. Dalton’s atomic theory. IV. Gay lussac’s law of combining volume Select the correct option.

‘Equal volumes of all gases under the same conditions of temperature and pressure contains equal number of molecules’. This is known as

Avogadro’s hypothesis states that

When the temperature of 23 ml of dry CO2 gas is changed from 10º to 30ºC at constant pressure of 760 mm, the volume of gas becomes closest to which one of the following ?

Equal volumes of oxygen and an unknown gas weigh 3.00g and 7.50g, respectively. Which of the following is the unknown gas?

In the gas equation PV = nRT, the value of R depends upon

In the gas equation PV = nRT, the value of n depends upon

The value of universal gas constant (R) depends on

Which one of the following is not the value of gas constant (R)? (a) 0.0821 L atm k mol (b) 1.99 cal K mol (c) 8.3 JK mol (d) 10.2 JK mol

An ideal gas equation is also called the …I… Here, I refers to

Which of the following expression is true for an ideal gas ? (a) P V T P V T (b) V V T T P P (c) P T V P T V (d) P VT P V T

An ideal gas equation is arranged as X P M RT M = molecular mass Where, X represents

If 10–4 dm3 of water is introduced into a 1.0 dm3 flask at 300 K. How many moles of water are in the vapour phase when equilibrium is established ? (Given, vapour pressure of H2O at 300 K is 3170 pa R = 8.314 JK–1 mol…

Gas equation PV = nRT is obeyed by ideal gas in

The gases become denser at …A… Here, A refers to

If 40 L of a gas is stored under a pressure of 150 atm at 300 K. How many moles of the gas are present in the cylinder?

Pure hydrogen sulphide is stored in a tank of 100 litre capacity at 20ºC and 2 atm pressure. The mass of the gas will be

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?