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Q. No.In thermodynamics, how are heat and work classified?
| 1. | point functions |
| 2. | extensive thermodynamic state variables |
| 3. | path function |
| 4. | intensive thermodynamic state variables |
Subtopic: Basic Terms |
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Level 1: 80%+
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Two gases are said to be in thermal equilibrium when they have the same:
1. pressure
2. volume
3. temperature
4. area
1. pressure
2. volume
3. temperature
4. area
Subtopic: Basic Terms |
89%
Level 1: 80%+
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In an isothermal change, an ideal gas obeys:
| 1. | Boyle's law | 2. | Charles law |
| 3. | Gay-Lussac law | 4. | None of the above |
Subtopic: Basic Terms |
87%
Level 1: 80%+
Hints
Refer to the given figure. Let \(\Delta U_1\) and \(\Delta U_2\) be the changes in internal energy of the system in processes \(A\) and \(B\). Then:
| 1. | \(\Delta U_1>\Delta U_2\) | 2. | \(\Delta U_1=\Delta U_2\) |
| 3. | \(\Delta U_1<\Delta U_2\) | 4. | \(\Delta U_1\neq\Delta U_2\) |
Subtopic: Cyclic Process |
85%
Level 1: 80%+
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The pressure versus temperature graph of an ideal gas is as shown in the figure. The density of the gas at point \(A\) is \({\mathit{\rho}}_{0}\). Density at point \(B\) will be:
| 1. | \(\dfrac{3}{4}{\mathit{\rho}}_{0}\) | 2. | \(\dfrac{3}{2}{\mathit{\rho}}_{0}\) |
| 3. | \(\dfrac{4}{3}{\mathit{\rho}}_{0}\) | 4. | \(2{\mathit{\rho}}_{0}\) |
Subtopic: Basic Terms |
81%
Level 1: 80%+
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A process is considered reversible if it satisfies which of the following conditions?
1. It is quasi-static.
2. It is non-dissipative.
3. Both (1) and (2).
4. Neither (1) nor (2).
Subtopic: Types of Processes |
79%
Level 2: 60%+
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What is the maximum amount of work that can be extracted from \(200~\mathrm{cal}\) of heat energy?
| 1. | \( 280 \mathrm{~J} \) | 2. | \( 800 \mathrm{~J} \) |
| 3. | \( 420 \mathrm{~J} \) | 4. | \( 840 \mathrm{~J}\) |
Subtopic: First Law of Thermodynamics |
79%
Level 2: 60%+
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Which of the following can not determine the state of a thermodynamic system?
| 1. | pressure and volume |
| 2. | volume and temperature |
| 3. | temperature and pressure |
| 4. | any one of pressure, volume, or temperature |
Subtopic: Basic Terms |
79%
Level 2: 60%+
Hints
Match Column-I with Column-II and select the correct option.
| Column-I | Column-II | ||
| P. | Adiabatic process | A. | no work done by or on gas |
| Q. | Isochoric process | B. | some amount of heat given is converted into internal energy |
| R. | Isobaric process | C. | no heat exchange |
| S. | Isothermal process | D. | no change in internal energy |
| 1. | \(\mathrm{P\rightarrow A,Q\rightarrow B,R\rightarrow C,S\rightarrow D}\) |
| 2. | \(\mathrm{P\rightarrow A,Q\rightarrow C,R\rightarrow D,S\rightarrow B}\) |
| 3. | \(\mathrm{P\rightarrow C,Q\rightarrow A,R\rightarrow B,S\rightarrow D}\) |
| 4. | \(\mathrm{P\rightarrow B,Q\rightarrow D,R\rightarrow C,S\rightarrow A}\) |
Subtopic: Types of Processes |
92%
Level 1: 80%+
JEE
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An idea gas initially at \(0^\circ\) temperature, is compressed suddenly to one fourth of its volume if the ratio of specific heat at constant pressure to that at constant volume is \(\dfrac{3}{2},\) the change in temperature due to the thermodynamic process is:
1. \(300~\text K\)
2. \(273~\text K\)
3. \(286~\text K\)
4. \(374~\text K\)
1. \(300~\text K\)
2. \(273~\text K\)
3. \(286~\text K\)
4. \(374~\text K\)
Subtopic: Types of Processes |
90%
Level 1: 80%+
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