In Vander Waal's equation P+aV2V-b=RT, the dimensions of a are

1. M1L5T-2                    

2. M0L2T-3 

3. M1L3T-2                    

4. M1L1T-2

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Which law states that effect of pressure is same for all portion

1. Pascal’s law                               

2. Gay-lussac’s law

3. Dalton’s law                             

4. None of these

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The equation for an ideal gas is PV = RT, where V represents the volume of

1. 1 gm gas                         

2. Any mass of the gas

3. One gm mol gas               

4. One litre gas

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Under which of the following conditions is the law PV = RT obeyed most closely by a real gas

1. High pressure and high temperature

2. Low pressure and low temperature

3. Low pressure and high temperature

4. High pressure and low temperature

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The gas equation PVT= constant is true for a constant mass of an ideal gas undergoing

1. Isothermal change                           

2. Adiabatic change

3. Isobaric change                               

4. Any type of change

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That gas cannot be liquified :

1. Which obeys Vander Waal's equation

2. Which obeys gas equation at every temperature and pressure

3. The molecules of which are having potential energy

4. Which is a inert gas

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At STP the mass of one litre of air is 1.293 gm. The value of the specific gas constant will be :

1. 0.29 J/K-gm                       

2. 4.2 J/K-gm

3. 8.3 J/K-gm                         

3. 16.5 J/K-gm

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Specific heat
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The pressure P, volume V and temperature T of gas in the jar A and the other gas in the jar B at pressure 2P, volume V/4 and temperature 2T, then the ratio of the number of molecules in the jar A and B will be :

1.  1 : 1                             

2.  1 : 2

3.  2 : 1                             

4.  4 : 1

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A balloon contains 500 m3 of helium at 27°C and 1 atmosphere pressure. The volume of the helium at – 3°C temperature and 0.5 atmosphere pressure will be :

1.  500 m3                                 

2.  700 m3

3.  900 m3                                 

4. 1000 m3

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A vessel contains 1 mole of O2 gas (molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (molar mass 4) at temperature 2T has a pressure of

1. P/8                                   

2. P

3. 2P                                   

4. 8P

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