Mean kinetic energy per degree of freedom of gas molecules is:
1. 32kT32kT
2. kT
3. 12kT12kT
4. 32RT32RT
What is the mass of 2 liters of nitrogen at 22.4 atmospheric pressure and 273 K?
1. 28 g
2. 14×22.4×22.4 g
3. 56 g
4. None of these
The root-mean-square speed of hydrogen molecules at 300 K is 1930 m/s. Then the root mean square speed of oxygen molecules at 900 K will be: [MH CET 2002; Odisha JEE 2010]
1. 1930√3√3 m/s
2. 836 m/s
3. 643 m/s
4. 1930√31930√3 m/s
PV versus T graphs of equal masses of H2H2, HeHe and O2O2 are shown in the figure. Choose the correct alternative:
1. | A corresponds to H2H2, B to HeHe and C to O2O2 | 2. | A corresponds to HeHe, B to H2H2, and C to O2O2 |
3. | A corresponds to HeHe, B to O2O2, and C to H2H2 | 4. | A corresponds to O2O2, B to HeHe and C to H2H2 |
According to the kinetic theory of gases, at absolute zero temperature: [AIIM 1998; UPSEAT 2000]
1. Water freezes
2. Liquid helium freezes
3. Molecular motion stops
4. Liquid hydrogen freezes
The molecular weight of two gases is M1M1 and M2.M2. At any temperature, the ratio of root mean square velocities v1v1 and v2v2 will be:
1. √M1M2√M1M2
2. √M2M1√M2M1
3. √M1+M2M1−M2√M1+M2M1−M2
4. √M1−M2M1+M2√M1−M2M1+M2
An ideal gas is filled in a vessel, then
1. If it is placed inside a moving train, its temperature increases
2. Its centre of mass moves randomly
3. Its temperature remains constant in a moving car
4. None of these
The temperature of an ideal gas is increased from 27°27° to 927°C927°C. The r.m.s. speed of its molecules becomes-
1. twice
2. half
3. four times
4. one fourth
The equation (p+av2)(v-b)=RT(p+av2)(v−b)=RT is known as:
1. Perfect gas equation
2. Joule Thomson's equation
3. Vander Waal's equation
4. Maxwell's equation
The equation of state for 5 g of oxygen at a pressure P and temperature T, when occupying a volume V, will be: (where R is the constant)
1. PV = 5RT
2. PV = (52)RT(52)RT
3. PV = (516)RT(516)RT
4. PV = (532)RT(532)RT