AIIMS Physics Kinetic Theory Class 11 Questions

If radius of O₂ molecule = 40Å, T = 27°C and P = 1 atm. Find the time of relaxation.

Assertion: V$_{rms}$ and V$_{mean}$ of gaseous molecules is nearly of the order of velocity of sound. Reason: The sound travels in air because of vibrational molecular motion.

In Maxwell’s speed distribution curve, for N₂ gas, the average of |relative velocity| between two molecules at 300 K will be

Assertion : Vᵣₘₛ and Vₘₑₐₙ of gaseous molecules is nearly of the order of velocity of sound. Reason : The sound travels in air because of vibrational molecular motion.

Assertion: Mean free path of a gas molecules varies inversely as density of the gas. Reason: Mean free path varies inversely as pressure of gas.

The total translational kinetic energy of all the molecules of a given mass of an ideal gas is 1.5 times the product of its pressure and volume. Reason (R) The molecules of gas collide with each other and the velocities of the molecules change due to the collision.

In case of an ideal gas the value of cross product of pressure and volume is constant at a constant temperature. The mean square of the velocity is given as Vₘₛ ∝ 1/√m.

Assertion (A) The total translational kinetic energy of all the molecules of a given mass of an ideal gas is 1.5 times the product of its pressure and volume. Reason (R) The molecules of gas collide with each other and the velocities of the molecules change due to the collision.

Degree of freedom for polyatomic gas

Pressure versus temperature graph of an ideal gas is as shown in figure. Density of the gas at point A is ρ₀. Density at point B will be

Two balloons are filled, on with pure He gas and other by air, respectively. If the pressure and temperature of these balloons are same then the number of molecules per unit volume is

Two balloons are filled, one with pure He gas and other by air, respectively. If the pressure and temperature of these balloons are same then the number of molecules per unit volume is

v_rms, v_mp and v_av are root mean square, average and most probable speeds of molecules of a gas obeying Maxwellian velocity distribution. Which of the following statements is correct?

A flask containing air at 27°C is corked up at atmospheric pressure. The cork can be forced out by a pressure of 2.5 atmosphere. To what temperature the flask should be heated to do that?