For a gas, the r.m.s speed at 800 K is:

1. Four times the value at 200 K

2. Half the value at 200 K

3. Twice the value at 200 K

4. Same as at 200 K

Subtopic:  Types of Velocities |
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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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