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1.
If the rms speed of a gaseous molecule is 
at a pressure 
atm, then what will be the rms speed at a pressure 
atm and constant temperature?
at a pressure atm, then what will be the rms speed at a pressure atm and constant temperature?
2.
A 
litre cylinder containing 
gas at 
and 
is found to develop a leakage. When the leakage was repaired, the pressure dropped to 
of Hg at 
The number of mole of gas escaped out during leakage is:
litre cylinder containing gas at and is found to develop a leakage. When the leakage was repaired, the pressure dropped to of Hg at The number of mole of gas escaped out during leakage is:
3.
Avogadro's number is the number of molecules present at NTP in:
4.
The ratio of rate of diffusion of helium and methane under identical conditions of pressure and temperature is:
5.
At what temperature will be rate of effusion of 
be 
times the rate of effusion of 
at 
be times the rate of effusion of at
6.
When a sample of gas is compressed at constant temperature from 15 atm to 60 atm, its volume changes from
. Which of the following statements are possible explanations of this behaviour?
1. The gas behaves non-ideally
2. The gas dimerises
3. The gas is absorbed into the vessel walls
. Which of the following statements are possible explanations of this behaviour?1. The gas behaves non-ideally
2. The gas dimerises
3. The gas is absorbed into the vessel walls
7.
The root mean square velocity of a gas is double when the temperature is
8.
A flask is of a capacity one litre. What volume of air will escape out from it on heating from to 
Assume pressure constant:
to Assume pressure constant:
9.
The correct statement in the following is
10.
An element occurring in the bcc structure has 
unit cells. The total number of atoms of the element in these cells will be
unit cells. The total number of atoms of the element in these cells will be