The temperature of an ideal gas is increased from 27°C to 927°C. The root mean square speed of its molecules becomes
 
1. Twice
 
2. Half
 
3. Four times
 
4.One-fourth

Subtopic:  Types of Velocities |
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According to the kinetic theory of gases the r.m.s. velocity of gas molecules is directly proportional to

1. T                                 

2. T

3. T2                                 

4. 1/T

Subtopic:  Types of Velocities |
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At a given temperature the root mean square velocities of oxygen and hydrogen molecules are in the ratio

1.  16 : 1                               

2.  1 : 16

3.  4 : 1                                 

4.  1 : 4

Subtopic:  Types of Velocities |
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The value of densities of two diatomic gases at constant temperature and pressure are d1 and d2 , then the ratio of the speed of sound in these gases will be :

1. d1d2                                   

2. d2/d1

3. d1/d2                             

4. d1d2

Subtopic:  Types of Velocities |
 86%
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By what factor the r.m.s. velocity will change, if the temperature is raised from 27°C to 327°C

1.  2                                 

2.  2

3.  22                               

4.  1

Subtopic:  Types of Velocities |
 85%
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At a given temperature if Vrms is the root mean square velocity of the molecules of a gas and Vs the velocity of sound in it, then these are related as γ=CPCv

1. Vrms=Vs                             

2. Vrms=3γ×Vs

3. Vrms=γ3×Vs                   

4. Vrms=3γ×Vs

Subtopic:  Types of Velocities |
 75%
From NCERT
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For a gas at a temperature the root-mean-square velocity vrms , the most probable speed vmp , and the average speed vav obey the relationship

1. vav>vrms>vmp                               

2. vrms>vav>vmp

3. vmp>vav>vrms                               

4. vmp>vrms>vav

Subtopic:  Types of Velocities |
 92%
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Molecular motion shows itself as

1. Temperature                     

2. Internal Energy

3. Friction                             

4. Viscosity

Subtopic:  Kinetic Energy of an Ideal Gas |
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What is the velocity of wave in monoatomic gas having pressure 1 kilopascal and density 2.6 kg/m3 ?

1.  3.6 m/s                                 

2.  8.9×103 m/s

3.  Zero                                       

4.  None of these

Subtopic:  Types of Velocities |
 52%
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If the pressure in a closed vessel is reduced by drawing out some gas, the mean free path of the molecules:

1. decreases
2. increases
3. remains unchanged
4. increases or decreases according to the nature of the gas

Subtopic:  Mean Free Path |
 74%
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