A container has N molecules at absolute temperature T. If the number of molecules is doubled but kinetic energy in the box remains the same as before, the absolute temperature of the gas is:

(1) T

(2) $\frac{T}{2}$

(3) 3T

(4) 4T

During an experiment, an ideal gas is found to obey an additional law VP² = constant. The gas is initially at temperature T and volume V. When it expands to volume 2V, the resulting temperature is:

(1) $\frac{T}{2}$

(2) 2T

(3) $\sqrt{2}T$

(4) $\frac{T}{\sqrt{2}}$

When the pressure remaining constant, at what temperature, will the r.m.s. speed of gas molecules increases by 10% of the r.m.s. the speed at NTP?

(1) 81.5 K

(2) 81.5 ^oC

(3) 815.3 K

(4) -81.5 ^oC

Select the appropriate property of an ideal gas.

(1) Its molecules are infinitesimally small.

(2) There are no forces of interaction between its molecules.

(3) It strictly obeys the ideal gas laws.

(4) All of these

A real gas behaves as an ideal gas at:

(1) Very low pressure and high temperature.

(2) High pressure and low temperature.

(3) High pressure and high temperature.

(4) Low pressure and low temperature.

A gas at a pressure P₀ is contained in a vessel. If the masses of all the molecules are halved and their velocities doubled, then the resulting pressure P will be:

(1) 4P₀

(2) 2P₀

(3) P₀

(4) $\frac{{\mathrm{P}}_0}{2}$

If E is the energy density in an ideal gas, then the pressure of the ideal gas is:

(1) $P=\frac{2}{3}E$

(2) $P=\frac{3}{2}E$

(3) $P=\frac{5}{2}E$

(4) $P=\frac{2}{5}E$

A sample of a gas in a box is at pressure P₀ and temperature T₀. If the number of molecules is doubled and the total kinetic energy of the gas is kept constant, then the final temperature and pressure will be:

(1) ${\mathrm{T}}_0, {\mathrm{P}}_0$

(2) ${\mathrm{T}}_0, 2{\mathrm{P}}_0$

(3) $\frac{{\mathrm{T}}_0}{2}$, $2{\mathrm{P}}_0$

(4) $\frac{{\mathrm{T}}_0}{2}$, ${\mathrm{P}}_0$

The average velocity of gas molecules is:

(1) proportional to $\sqrt{\mathrm{T}}$.

(2) proportional to T.

(3) zero.

(4) Not possible to determine

Which of the following methods will enable the volume of an ideal gas to be increased four times?

(1) Double the temperature and reduce the pressure to half.

(2) Double the temperature and also double the pressure.

(3) Reduce the temperature to half and double the pressure.

(4) Reduce the temperature to half and reduce the pressure to half.