By what factor the r.m.s. velocity will change, if the temperature is raised from 27°C to 327°C
1.
2.
3.
4.
At a given temperature if is the root mean square velocity of the molecules of a gas and the velocity of sound in it, then these are related as
1.
2.
3.
4.
For a gas at a temperature the root-mean-square velocity , the most probable speed , and the average speed obey the relationship
1.
2.
3.
4.
Molecular motion shows itself as
1. Temperature
2. Internal Energy
3. Friction
4. Viscosity
What is the velocity of wave in monoatomic gas having pressure 1 kilopascal and density ?
1.
2.
3. Zero
4. None of these
If the pressure in a closed vessel is reduced by drawing out some gas, the mean free path of the molecules:
1. | decreases |
2. | increases |
3. | remains unchanged |
4. | increases or decreases according to the nature of the gas |
At constant volume, temperature is increased. Then
1. Collision on walls will be less
2. Number of collisions per unit time will increase
3. Collisions will be in straight lines
4. Collisions will not change
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
1. 800 K
2. 1600 K
3. 1200 K
3. None of these
A cubical box with porous walls containing an equal number of and molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature T. The ratio of of molecules to that of the of molecules, found in the chamber outside the box after a short interval is
1.
2.
3.
4.
The degrees of freedom of a triatomic gas is
1. 2
2. 4
3. 6
3. 8