The ratio of the vapour densities of two gases at a given temperature is 9:8. The ratio of the rms velocities of their molecules is:
9:8
8:9
An ant is walking on the horizontal surface. The number of degrees of freedom of ant will be:
1
2
3
6
At which of the following temperature would the molecules of gas have twice the average kinetic energy they have at 200C?
400C
800C
5860C
3130C
The temperature of H2 at which the rms velocity of its molecules is seven times the rms velocity of the molecules of nitrogen at 300 K is:
2100 K
1700 K
1350 K
1050 K
The r.m.s. velocity at a temperature is 2 times the r.m.s. velocity at 300 K. What is this temperature?
900 K
2400 K
600 K
1200 K
The temperature of a gas is raised from 270C to 9270C. What change will occur to the rms molecular speed ?
gets halved
gets doubled
gets times the earlier value
remains unchanged
What is the absolute mass of an atom of oxygen? Atomic mass of oxygen is 16 and Avogadro's number =
A gas at a temperature of 250 K is contained in a closed vessel. If the gas is heated through 1 K, then percentage increase in its pressure is
0.1 %
0.2 %
0.3 %
0.4 %
In an adiabatic change, the pressure and temperature of a monatomic gas are related as , where c equals:
At Boyle's temperature:
Joule's effect is positive
b of van der Waals' equation is zero
gas obeys Boyle's law
Joule's effect invalid
