The figure shows two flasks connected to each other. The volume of the flask 1 is twice that of flask 2. The system is filled with an ideal gas at temperature 100 K and 200 K respectively. If the mass of the gas in flask 1 be m, then what is the mass of the gas in flask 2?

         

1. m                                       

2. m2

3. m4                                     

4. m8

Subtopic:  Ideal Gas Equation |
 75%
From NCERT
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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

Subtopic:  Types of Velocities |
 72%
From NCERT
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At room temperature, the rms speed of the molecules of certain diatomic gas is found to be \(1930\) m/s. The gas is:
1. \(H_2\)
2. \(F_2\)
3. \(O_2\)
4. \(Cl_2\)

Subtopic:  Types of Velocities |
 62%
From NCERT
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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.

Subtopic:  Types of Velocities |
 95%
From NCERT
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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

Subtopic:  Types of Velocities |
 81%
From NCERT
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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.

Subtopic:  Ideal Gas Equation |
 52%
From NCERT
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At which temperature the velocity of \(\mathrm{O_2}\) molecules will be equal to the velocity of \(\mathrm{N_2}\) molecules at \(0^\circ \mathrm{C}?\)

1. \(40^\circ \mathrm{C}\) 2. \(93^\circ \mathrm{C}\)
3. \(39^\circ \mathrm{C}\) 4. Cannot be calculated
Subtopic:  Types of Velocities |
 78%
From NCERT
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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

Subtopic:  Types of Velocities |
 86%
From NCERT
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Two vessels having equal volume contain molecular hydrogen at one atmosphere and helium at two atmospheres respectively. If both samples are at the same temperature, the mean velocity of hydrogen molecules is

1. Equal to that of helium                           

2. Twice that of helium

3. Half that of helium                                 

4. 2 times that of helium

Subtopic:  Types of Velocities |
 57%
From NCERT
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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 |
 82%
From NCERT
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