In Vander Waal’s equation, a and b represent $\left(\mathrm{P}+\frac{\mathrm{a}}{{\mathrm{V}}^2}\right)\left(\mathrm{v}-\mathrm{b}\right)=\mathrm{RT}$

At 0°C the density of a fixed mass of a gas divided by pressure is x. At 100°C, the ratio will be:

At what temperature volume of an ideal gas at 0°C becomes triple keeping the pressure constant :

If an ideal gas has volume V at 27°C and it is heated at a constant pressure so that its volume becomes 1.5V. Then the value of final temperature will be

A tyre kept outside in sunlight bursts off after sometime because of :

In Boyle's law what remains constant :

The figure shows two flasks connected to each other. The volume of the flask 1 is twice that of flask 2. The system is filled with an ideal gas at temperature 100 K and 200 K respectively. If the mass of the gas in flask 1 be m, then what is the mass of the gas in flask 2?

The absolute temperature of a gas is determined by

At room temperature, the r.m.s. speed of the molecules of certain diatomic gas is found to be 1930 m/s. The gas is :

Moon has no atmosphere because :

The molecules of a given mass of a gas have a r.m.s. velocity of 200 m/sec at 27°C and $1.0\times {10}^5 \mathrm{N}/{\mathrm{m}}^2$ pressure. When the temperature is 127°C and pressure is $0.5\times {10}^5 \mathrm{N}/{\mathrm{m}}^2,$ the r.m.s. velocity in m/sec will be

Which of the following statement is true?

    temperature are the same.

    the number of molecules.

At which temperature the velocity of ${\mathrm{O}}_2$ molecules will be equal to the velocity of ${\mathrm{N}}_2$ molecules at 0°C?

The respective speeds of the molecules are 1, 2, 3, 4 and 5 km/sec. The ratio of their r.m.s. velocity and the average velocity will be

Two vessels having equal volume contain molecular hydrogen at one atmosphere and helium at two atmospheres respectively. If both samples are at the same temperature, the mean velocity of hydrogen molecules is

According to the kinetic theory of gases the r.m.s. velocity of gas molecules is directly proportional to

At a given temperature the root mean square velocities of oxygen and hydrogen molecules are in the ratio

The value of densities of two diatomic gases at constant temperature and pressure are ${\mathrm{d}}_1$ and ${\mathrm{d}}_2 ,$ then the ratio of the speed of sound in these gases will be :

By what factor the r.m.s. velocity will change, if the temperature is raised from 27°C to 327°C

At a given temperature if ${\mathrm{V}}_{\mathrm{rms}}$ is the root mean square velocity of the molecules of a gas and ${\mathrm{V}}_{\mathrm{s}}$ the velocity of sound in it, then these are related as $\left(\mathrm{\gamma }=\frac{{\mathrm{C}}_{\mathrm{P}}}{{\mathrm{C}}_{\mathrm{v}}}\right)$

A gas is filled in the cylinder shown in the figure. The two pistons are joined by a string. If the gas is heated, the pistons will

For a gas at a temperature the root-mean-square velocity ${\mathrm{v}}_{\mathrm{rms}}$ , the most probable speed ${\mathrm{v}}_{\mathrm{mp}}$ , and the average speed ${\mathrm{v}}_{\mathrm{av}}$ obey the relationship

Molecular motion shows itself as

What is the velocity of wave in monoatomic gas having pressure 1 kilopascal and density $2.6 \mathrm{kg}/{\mathrm{m}}^3$ ?

If the pressure in a closed vessel is reduced by drawing out some gas, the mean free path of the molecules

At constant volume, temperature is increased. Then

The r.m.s. speed of a certain gas is n at 400K. The temperature at which the r.m.s. speed becomes two times, will be

A cubical box with porous walls containing an equal number of ${\mathrm{O}}_2$ and ${\mathrm{H}}_2$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature T. The ratio of ${\mathrm{v}}_{\mathrm{rms}}$ of ${\mathrm{O}}_2$ molecules to that of the ${\mathrm{v}}_{\mathrm{rms}}$ of ${\mathrm{H}}_2$ molecules, found in the chamber outside the box after a short interval is

The degrees of freedom of a triatomic gas is