Chemistry Question Bank

If average velocity of a sample of gas molecules at 300 K is 5 cm s-1, what is RMS velocity of same sample of gas molecules at the same temperature? (Given, : : u v 1 : 1.224 : 1.127) (most probable velocity), u(RMS…

Positive deviation from ideal behaviour takes place because of

The compressibility factor of an ideal gas is

For H2 gas, the compressibility factor, Z = PV/n RT is:

Density of carbon monoxide is minimum at (KCET 2014)

The compressibility of a gas is less than unity at STP. Therefore

Equal mass of H2, O2 and methane have been taken in a container of volume V at temperature 27oC in identical conditions. The ratio of the volumes of gases H2 : O2 : CH4 would be (CBSE AIPMT 2014)

Average KE of CO2 at 27°C is E. The average kinetic energy of N2 at the same temperature will be (BVP 2010)

n n C H What is the value of n? (WB JEE 2010)

At high pressure, all the gases have

Dominance of strong repulsive force among the molecules of the gas (Z = compressibility factor)

Any gas shows maximum deviation from ideal gas at

For a gas deviation from ideal behaviour is maximum at :

The pressure of real gases is less than that of ideal gas because of

A gas is said to behave like an ideal gas when the relation PV/T = constant. When do you expect a real gas to behave like an ideal gas ?

The ratio of root mean square velocity to average velocity of a gas molecule at a particular temperature is

The average velocity of an ideal gas molecule at 27ºC is 0.3 m/s. The average velocity at 927º C will be

At constant volume, for a fixed number of moles of a gas the pressure of the gas increases with rise of temperature due to

The ratio between the root mean square speed of H2 at 50K and that of O2 at 800 K is

The r.m.s. velocity of hydrogen is 7 time the r.m.s. velocity of nitrogen. If T is the temperature of the gas,

The root mean square velocity of an ideal gas at constant pressure varies with density (d) as

For a monatomic gas kinetic energy = E. The relation with rms velocity is (a) 1/ 2 2E u m (b) 1 / 2 3E u 2m (c) 1 / 2 E u 2m (d) 1/ 2 E u 3m

Which one of the following statements is not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

The average speed at temperature TºC of CH4(g) is 88 × 103 ms–1. What is the value of T ?

At what temperature most probable speed of O2 molecules have the same value of root mean square speed of O2 molecules at 300 K ?