The absolute temperature of a gas is determined by

1. The average momentum of the molecules

2. The velocity of sound in the gas

3. The number of molecules in the gas

4. The mean square velocity of the molecules

Concept Questions :-

Types of velocity
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At what temperature is the root mean square velocity of gaseous hydrogen molecules is equal to that of oxygen molecules at 47°C

1.  20 K                               

2.  80 K

3.  – 73 K                           

4.  3 K

Concept Questions :-

Types of velocity
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The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to

1. m0                                     

2. m

3. m                                   

4. 1m

Concept Questions :-

Types of velocity
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At room temperature, the r.m.s. speed of the molecules of certain diatomic gas is found to be 1930 m/s. The gas is :

1. H2                               

2. F2

3. O2                               

4. Cl2

Concept Questions :-

Types of velocity
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Moon has no atmosphere because :

1. The r.m.s. the velocity of all gases is more than the escape velocity from the moon's surface.

2. Its surface is not smooth.

3. It is quite far away from the earth.

4. It does not have a population and plants.

Concept Questions :-

Types of velocity
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Speed of sound in a gas is v and r.m.s. velocity of the gas molecules is c. The ratio of v to c is

1. 3γ                                 

2. γ3

3. 3γ                               

4. γ3

Concept Questions :-

Types of velocity
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The molecules of a given mass of a gas have a r.m.s. velocity of 200 m/sec at 27°C and 1.0×105 N/m2 pressure. When the temperature is 127°C and pressure is 0.5×105 N/m2 , the r.m.s. velocity in m/sec will be

1. 10023                             

2. 1002

3. 4003                                 

4. None of the above

Concept Questions :-

Types of velocity
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Which of the following statement is true?

1. Absolute zero degree temperature is not zero energy temperature.

2. Two different gases at the same temperature pressure have equal root mean square velocities.

3. The root mean square speed of the molecules of different ideal gases, maintained at the same

    temperature are the same.

4. Given sample of 1 cc of hydrogen and 1 cc of oxygen both at NTP; oxygen sample has a large

    the number of molecules.

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At which temperature the velocity of O2 molecules will be equal to the velocity of N2 molecules at 0°C

1. 40°C                             

2. 93°C

3. 39°C                             

4. Cannot be calculated

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Types of velocity
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The respective speeds of the molecules are 1, 2, 3, 4 and 5 km/sec. The ratio of their r.m.s. velocity and the average velocity will be

1. 11 : 3                                   

2. 3 : 11

3. 1 : 2                                         

4. 3 : 4

Concept Questions :-

Types of velocity
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