Chemistry Question Bank

In case of hydrogen and helium, the van der Waal’s forces are

Two separate bulbs contain ideal gases A and B. The density of gas A is twice that of gas B. The molecular mass of A is half that of gas B. The two gases are at the same temperature. The ratio of the pressure of A to …

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 ?

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

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

Which of the following gases would have the highest R.M.S. velocity at 25ºC ?

According to kinetic theory of gases, the root mean square velocity is directly proportional to

The temperature of the gas is raised from 27ºC to 927ºC, the root mean square velocity is (a) 927 / 27 times the earlier value

The root mean square speeds at STP for the gases H2, N2, O2 and HBr are in the order :

The ratio among most probable velocity, mean velocity and root mean square velocity is given by

Root mean square velocity of a gas molecule is proportional to

By which factor does the root mean square velocity of a gaseous molecule increases, when the temperature is increase from 273 K to 1092 K.