The temperature at which the r.m.s velocity of carbon dioxide becomes the same as that of nitrogen at 210C is-
1. 462 oC
2. 273 K
3. 189 oC
4. 546 K
The density of O2(g) is maximum at-
1. STP
2. 273 K and 2 atm
3. 546 K and 1 atm
4. 546 K and 2 atm
In van der Waal's equation of state for a non-ideal gas, the term that accounts for the intermolecular force is-
1. V-b
2. (P+a/V2)
3. RT
4. (RT)-1
The gas among the following that can be most readily liquified is-
( Value of 'a' for NH3 = 4.17, CO2 = 3.59, SO2 = 6.71, Cl2 = 6.49)
1. NH3
2. Cl2
3. SO2
4. CO2
At moderate pressure, the van der Waal's equation becomes:
1. PVm = RT
2. P(Vm-b) = RT
3. (P+a/V2m) (Vm )= RT
4. P = RT/Vm + a/V2m
Which among the following mixtures of gases at room temperature does not obey Dalton's law of partial pressure-
1. He and O2
2. NH3 and HCl
3. H2 and He
4. N2 and He
1.6 g O2 gas and 0.1 g H2 gas are placed in a 1.12 L flask at 0 oC. The total pressure of the gas mixture will be-
1. 2 atm
2. 3 atm
3. 4 atm
4. 1 atm
An open flask containing air is heated from 300 K to 500 K. The percentage of air that will escape into the atmosphere if pressure is kept constant is-
1. 80
2. 40
3. 60
4. 20
V versus T curves at constant pressure P1 and P2 for an ideal gas are as shown in the figure. The correct statement is-
1. P1>P2
2. P1<P2
3. P1=P2
4. All of the above
The kinetic energy for 14 grams of nitrogen gas at 127°C is nearly -
(mol. mass of nitrogen = 28 and gas constant = 8.31JK–1mol–1)
1. 1.0 J
2. 4.15 J
3. 2493 J
4. 3.3 J