An isolated system-

1. is a specified region where transfer of energy and mass takes place
2. is a region of constant mass and only energy is allowed through the closed boundaries
3. is one in which mass within the system is not necessarily constant.
4. cannot transfer neither energy nor mass to or from the surroundings.


 

Subtopic:  Ideal Gas Equation |
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Vrms,Vav,Vmp are root mean square, average and most probable speeds of molecules of a gas obeying Maxwellian velocity distribution. Which of the following statements is correct?

1. Vrms<Vav<Vmp

2. Vrms>Vav>Vmp

3. Vrms < Vav>Vmp

4. Vavg>Vrms<Vmp

Subtopic:  Types of Velocities |
 83%
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Gas is found to obey the law P2V = constant. The initial temperature and volume are T0 and V0. If the gas expands to a volume 3V0, its final temperature becomes:

1. T03           

2. T03

3. 3T0           

4. None of these

Subtopic:  Ideal Gas Equation |
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The curve between absolute temperature and \(\mathrm{v}^2_{rms}\) is:

1. 2.
3. 4.
Subtopic:  Types of Velocities |
 71%
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The root-mean-square (RMS) speed of oxygen molecules O2 at a certain absolute temperature is v. If the temperature is doubled and the oxygen gas dissociates into atomic oxygen, the RMS speed would be:

1. V                       

2. 2v

3. 2 v                     

4. 2 2v

Subtopic:  Types of Velocities |
 55%
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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 |
 66%
From NCERT
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 Volume, pressure, and temperature of an ideal gas are \(V\), \(P\), and \(T\) respectively. If the mass of its molecule is \(m\), then its density is: [\(k\)=Boltzmann's constant]

1. \(mkT\) 2. \(P \over kT\)
3. \(P \over kTV\) 4. \(Pm \over kT\)
Subtopic:  Ideal Gas Equation |
 81%
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In the adjacent V-T diagram what is the relation between P1 and P2 ?


1. P2=P1                               

2. P2>P1

3. P2<P1                                 

4. cannot be predicated

 

Subtopic:  Ideal Gas Equation |
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Which one of the following graph is correct at constant pressure?

1. 2.
3. 4.
Subtopic:  Ideal Gas Equation |
 62%
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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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