For Boyle's law to hold the gas should be :

1. Perfect and of constant mass and temperature

2. Real and of constant mass and temperature

3. Perfect and at a constant temperature but variable mass

4. Real and at a constant temperature but variable mass

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Consider a 1 c.c. sample of air at the absolute temperature T0 at sea level and another 1 c.c. sample of air at a height where the pressure is the one-third atmosphere. The absolute temperature T of the sample at that height is :

1. Equal to T0/3

2. Equal to 3/T0

3. Equal to T0

4. Cannot be determined in terms of T0 from the above data

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To double the volume of a given mass of an ideal gas at 27°C keeping the pressure constant, one must raise the temperature in degree centigrade to

1. 54°                                   

2. 270°

3. 327°                                 

4. 600°

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Which of the following statements about kinetic theory of gases is wrong

1. The molecules of a gas are in continuous random motion

2. The molecules continuously undergo inelastic collisions

3. The molecules do not interact with each other except during collisions

4. The collisions amongst the molecules are of short duration

Concept Questions :-

Kinetic energy of gas
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If a Vander-Waal's gas expands freely, then final temperature is

1. Less than the initial temperature

2. Equal to the initial temperature

3. More than the initial temperature

4. Less or more than the initial temperature depending on the nature of the gas

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Maxwell distribution curve
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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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