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1.
are van der Waals' constants for gases. Chlorine is more easily liquefied than ethane because
are van der Waals' constants for gases. Chlorine is more easily liquefied than ethane because
2.
Longest mean free path under similar conditions of 
and 
stands for:
and stands for:
3.
Ferrous oxide has a cubic structure and each edge of the unit cell is 
. Assuming density of the oxide as 4.0g/
then the number of 
and 
ions present in each unit cell will be
. Assuming density of the oxide as 4.0g/then the number of and ions present in each unit cell will be
4.
Which one of the following is correct about surface tension (ST) and viscosity 
?
?
5.
In which of the following crystals alternate tetrahedral voids are occupied?
6.
For an ideal gas, number of mol per litre in terms of its pressure 
temperature and gas constant 
is
temperature and gas constant is
7.
For a gas 
the gas is made up of molecules which are:
the gas is made up of molecules which are:
8.
As the speed of molecules increases, the number of collisions per second:
9.
To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mole of He and 1.0 mole of an unknown compound (vapour pressure 0.68 atm at
) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at is close to
) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at is close to
10.
A closed vessel contains equal number of nitrogen and oxygen molecules at a pressure of mm. If nitrogen is removed from the system, then the pressure will be:
mm. If nitrogen is removed from the system, then the pressure will be: