An ideal gas is compressed to half its initial volume by means of several processes. Which of the following processes results in the maximum work being done on the gas?
1. Adiabatic
2. Isobaric
3. Isochoric
4. Isothermal

Subtopic:  Work Done by a Gas |
 70%
From NCERT
NEET - 2015
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During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio of CP/CV for the gas is equal to:

1. 4/3 2. 2
3. 5/3 4. 3/2
Subtopic:  Types of Processes | Molar Specific Heat |
 64%
From NCERT
NEET - 2013
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An ideal gas goes from state A to state B via three different processes, as indicated in the P-V diagram. If Q1, Q2, Q3 indicates the heat absorbed by the gas along the three processes and U1, U2, U3 indicates the change in internal energy along the three processes respectively, then:

1. \(\mathrm{Q}_1>\mathrm{Q}_2>\mathrm{Q}_3 \) and \(\Delta \mathrm{U}_1=\Delta \mathrm{U}_2=\Delta \mathrm{U}_3\)
2. \(\mathrm{Q}_3>\mathrm{Q}_2>\mathrm{Q}_1\) and \(\Delta \mathrm{U}_1=\Delta \mathrm{U}_2=\Delta \mathrm{U}_3\)
3. \(\mathrm{Q}_1=\mathrm{Q}_2=\mathrm{Q}_3\) and \(\Delta \mathrm{U}_1>\Delta \mathrm{U}_2>\Delta \mathrm{U}_3\)
4. \(\mathrm{Q}_3>\mathrm{Q}_2>\mathrm{Q}_1\) and \(\Delta \mathrm{U}_1>\Delta \mathrm{U}_2>\Delta \mathrm{U}_3\)

Subtopic:  First Law of Thermodynamics |
 80%
From NCERT
NEET - 2012
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In thermodynamic processes, which of the following statements is not true?

1. In an adiabatic process, the system is insulated from the surroundings.
2. In an isochoric process, the pressure remains constant.
3. In an isothermal process, the temperature remains constant.
4. In an adiabatic process, \(P V^\gamma\) = constant.

Subtopic:  Types of Processes |
 90%
From NCERT
NEET - 2009
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In isothermal expansion, the pressure is determined by:

1. Temperature only
2. Compressibility only
3. Both temperature and compressibility
4. None of these


 

Subtopic:  Types of Processes |
 59%
From NCERT
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Under isothermal conditions, the volumes of ideal gas A and actual gas B grow from V to 2 V. The increase in internal energy:

1. will be the same in both A and B.
2. will be zero in both the gases.
3. of B will be more than that of A.
4. of A will be more than that of B.



 

Subtopic:  Molar Specific Heat |
From NCERT
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The specific heat of a gas in an isothermal process is: 
1. Infinite
2. Zero
3. Negative
4. Remains constant

Subtopic:  Molar Specific Heat |
 69%
From NCERT
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The pressure and density of a diatomic gas (γ=7/5) changes adiabatically from (P, d) to (P', d'). If d'd=32, then P'P should be: 

1. 1/128 2. 32
3. 128 4. None of the above
Subtopic:  Types of Processes |
 67%
From NCERT
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Two identical samples of a gas are allowed to expand, (i) isothermally and (ii) adiabatically. Work done will be:

1. more in the isothermal process.
2. more in the adiabatic process.
3. equal in both processes.
4. none of the above.

Subtopic:  Work Done by a Gas |
 67%
From NCERT
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In an adiabatic expansion of a gas, if the initial and final temperatures are \(T_1\) and \(T_2\), respectively, then the change in internal energy of the gas is:
1. \(\frac{nR}{\gamma-1}(T_2-T_1)\)
2. \(\frac{nR}{\gamma-1}(T_1-T_2)\)
3. \(nR ~(T_1-T_2)\)
4. Zero

Subtopic:  First Law of Thermodynamics |
 67%
From NCERT
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