For real gases van der Waals equation is written as
where 'a' and 'b' are van der Waals constants.
Two sets of gases are:
(I) (II)
The gases given in set-I are in increasing order of 'b' and gases given in set-II are in decreasing order of 'a'. Select the correct order from the following:
1.
2.
3.
4.
The pressure exerted by 6.0 g of methane gas in a 0.03 m3 vessel at 129 ºC is:
(Atomic masses : C = 12.01, H = 1.01 and R = 8.314 JK–1mol–1)
1. 13409 Pa
2. 41648 Pa
3. 31684 Pa
4. 215216 Pa
A bubble of air is underwater at a temperature15°C and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is 25°C and the pressure is 1.0 bar, what will happen to the volume of the bubble?
1. Volume will become greater by a factor of 2.5
2. Volume will become greater by a factor of 1.6
3. Volume will become greater by a factor of 1.1
4. Volume will become smaller by a factor of 0.70
A certain gas takes three times as long to effuse out as helium. Its molecular mass will be:
1. 36 u
2. 64 u
3. 9 u
4. 27 u
Average molar kinetic energy of CO and N2 at same temperature is:
1. KE1 = KE2
2. KE1 > KE2
3. KE1 < KE2
4. Can't say anything. Both volumes are not given.
In a gaseous mixture which of gases have the same rate of diffusion:
1.
2.
3.
4. All of the above.
If 400 ml gas at 500 torrs and 666.6 ml gas at 600 torrs is taken in a container of 3 liters, then the total pressure of the mixture is:
1. 200 torr
2. 400 torr
3. 600 torr
4. 50 torr
The temperature of 4.0 mole of a gas occupying 5 dm3 at 3.32 bar is -
(R = 0.083 bar dm3 K–1 mol–1).
1. 40 K
2. 30 K
3. 20 K
4. 50 K
The minimum pressure required to compress 600 dm3 of a gas at 1 bar to 150 dm3 at 40°C is
1. 4.0 bar
2. 0.2 bar
3. 1.0 bar
4. 2.5 bar
The volume occupied by 8.8 g of CO2 at 31.1°C and 1 bar pressure is:
(R = 0.083 bar L K–1 mol–1)
1. 4.05 L
2. 3.05 L
3. 6.05 L
4. 5.05 L