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
Van der Waals parameter 'a' signifies -
1.The magnitude of intermolecular attractive forces.
2. The magnitude of intermolecular repulsive forces.
3. The volume of a gas molecule.
4. All of the above.
The unit of van der Waals' constant 'b' is -
1. cm3 mol-1
2. litre mol-1
3. m3 mol-1
4. All of the above
For one mole of van der Waal's gas when b=0 and T=300 K, the PV vs. 1/V plot is shown below.
The value of the van der Waal's constant 'a' (atm. ) is-
1. 1.0
2. 4.5
3. 1.5
4. 3.0
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
If pressure is in atmosphere and volume in dm3 , then the unit of 'a' is-
1.
2.
3.
4.
Van der Waals equation at low pressure is -
1. PV = RT - Pb
2. PV = RT -
3. PV = RT +
4. PV = RT + Pb
At lower temperature, all gases except H2 and He show:
1. Negative deviation
2. Positive deviation
3. Positive and negative deviation
4. None of the above
The ratio a/b (the terms used in van der Waals' equation) has the unit-
1. atm litre mol-1
2. atm dm3 mol-1
3. dyne cm mol-1
4. All of the above