The average kinetic energy of a helium atom at 30°C is:                                                                                           [MP PMT 2004]

1. Less than 1 eV

2. A few KeV

3. 50-60 eV

4. 13.6 eV

Subtopic:  Kinetic Energy of an Ideal Gas |
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Choose the correct option related to the specific heat at constant volume CV -

1. CV=12fR           

2. CV=Rγ-1

3. CV=CPγ               

4. All of these

Subtopic:  Specific Heat |
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The curve between absolute temperature and vrms2 is:

1. 

2. 

3. 

4. 

Subtopic:  Types of Velocities |
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Five molecules of a gas have speeds, 1, 2, 3, 4 and 5 kms-1.  The value of the root mean square speed of the gas molecules is:

1. 3 kms-1           

2. 11 kms-1

3. 12π kms-1   

4. 3.5 kms-1

Subtopic:  Types of Velocities |
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The average velocity of an ideal gas molecule is:                                                                                                                   [OJEE 2010]

1. proportional to T

2. proportional to T2

3. proportional to T3

4. zero

Subtopic:  Types of Velocities |
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For a gas, RCV=0.67.  This gas is made up of molecules which are:                                                                   [JIPMER 2001, 02]

1. Diatomic           

2. Mixture of diatomic and polyatomic molecules

3. Monoatomic     

4. Polyatomic

Subtopic:  Specific Heat |
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At constant temperature, on increasing the pressure of a gas by 5% , its volume will decrease by:          

1. 5%       

2. 5.26 %         

3. 4.26 %         

4. 4.76 %

Subtopic:  Ideal Gas Equation |
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At what temperature is the root mean square speed of molecules of hydrogen twice as that at STP?

1. 273 K

2. 546 K

3. 819 K

4. 1092 K

Subtopic:  Types of Velocities |
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At what temperature, is the root mean square velocity of gaseous hydrogen molecules equal to that of oxygen molecules at 47°C:[MP PET 1997, 2000; RPET 1999; AIEEE 2002; J & K CET 2004; Kerala PET 2010]

1. 20 K           

2. 80 K           

3. - 73 K             

4. 3 K

Subtopic:  Types of Velocities |
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The average kinetic energy of a gas molecule can be determined by knowing:                                        [RPET 2000, MP PET 2010]

1. The number of molecules in the gas

2. The pressure of the gas only

3. The temperature of the gas only

4. None  of the above is enough by itself

Subtopic:  Kinetic Energy of an Ideal Gas |
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