The temperature of an ideal gas is increased from 27° to 927°C. The r.m.s. speed of its molecules becomes-

1. twice           

2. half           

3. four times         

4. one fourth

Subtopic:  Types of Velocities |
 76%
From NCERT
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An ideal gas is filled in a vessel, then

1. If it is placed inside a moving train, its temperature increases

2. Its centre of mass moves randomly

3. Its temperature remains constant in a moving car

4. None of these

Subtopic:  Kinetic Energy of an Ideal Gas |
 68%
From NCERT
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Molecular weight of two gases are \(M_1\) and \(M_2.\) At any temperature, the ratio of root mean square velocities \(v_1\) and \(v_2\) will be:
1. \(\sqrt{\frac{M_1}{M_2}}\)
2. \(\sqrt{\frac{M_2}{M_1}}\)
3. \(\sqrt{\frac{M_1+M_2}{M_1-M_2}}\)
4. \(\sqrt{\frac{M_1-M_2}{M_1+M_2}}\)

Subtopic:  Types of Velocities |
 89%
From NCERT
PMT - 1996
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According to the kinetic theory of gases, at absolute zero temperature: [AIIM 1998; UPSEAT 2000]

1. Water freezes                             

2. Liquid helium freezes

3. Molecular motion stops               

4. Liquid hydrogen freezes

Subtopic:  Types of Velocities |
 77%
From NCERT
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PV versus T graphs of equal masses of \(H_2\)\(He\) and \(O_2\) are shown in the figure. Choose the correct alternative:          

1. A corresponds to \(H_2\), B to \(He\) and C to \(O_2\) 2. A corresponds to \(He\), B to \(H_2\), and C to \(O_2\)
3. A corresponds to \(He\), B to \(O_2\), and C to \(H_2\) 4. A corresponds to \(O_2\), B to \(He\)  and C to \(H_2\)
Subtopic:  Ideal Gas Equation |
 65%
From NCERT
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The root-mean-square speed of hydrogen molecules at 300 K is 1930 m/s. Then the root mean square speed of oxygen molecules at 900 K will be: [MH CET 2002; Odisha JEE 2010]

1. 19303 m/s                     

2. 836 m/s

3. 643 m/s                               

4. 19303 m/s

Subtopic:  Types of Velocities |
 56%
From NCERT
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What is the mass of 2 liters of nitrogen at 22.4 atmospheric pressure and 273 K?

1. 28 g               

2. 14×22.4 g

3. 56 g               

4. None of these

Subtopic:  Ideal Gas Equation |
 55%
From NCERT
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Mean kinetic energy per degree of freedom of gas molecules is:

1. 32kT             

2. kT             

3. 12kT             

4. 32RT

Subtopic:  Law of Equipartition of Energy |
 58%
From NCERT
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The equation p+av2v-b=RT is known as:

1. Perfect gas equation

2. Joule Thomson's equation

3. Vander Waal's equation

4. Maxwell's equation

Subtopic:  Ideal Gas Equation |
 83%
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The equation of state for 5 g of oxygen at a pressure P and temperature T, when occupying a volume V, will be: (where R is the constant)

1. PV = 5RT

2. PV = 52RT

3. PV = 516RT

4. PV = 532RT

Subtopic:  Ideal Gas Equation |
 83%
From NCERT
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