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Q. No.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%
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NEET - 2009
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Thermodynamic processes are indicated in the following diagram.
Match the following:
Match the following:
| Column I | Column II | ||
| \(P\). | Process-I | \(\mathrm{a}\). | Adiabatic |
| \(Q\). | Process-II | \(\mathrm{b}\). | Isobaric |
| \(R\). | Process-III | \(\mathrm{c}\). | Isochoric |
| \(S\). | Process-IV | \(\mathrm{d}\). | Isothermal |
| 1. | \(P \rightarrow \mathrm{a}, Q \rightarrow \mathrm{c}, R \rightarrow \mathrm{d}, S \rightarrow \mathrm{b}\) |
| 2. | \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{a}, R \rightarrow \mathrm{d}, S \rightarrow b\) |
| 3. | \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow \mathrm{a}\) |
| 4. | \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow \mathrm{a}\) |
Subtopic: Types of Processes |
88%
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NEET - 2017
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A polyatomic gas \(\left(\gamma = \frac{4}{3}\right)\) is compressed to \(\frac{1}{8}\) of its volume adiabatically. If its initial pressure is \(P_0,\) its new pressure will be:
| 1. | \(8P_0\) | 2. | \(16P_0\) |
| 3. | \(6P_0\) | 4. | \(2P_0\) |
Subtopic: Types of Processes |
86%
From NCERT
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Which of the following graph shows the variation of pressure P with volume V for an ideal gas at a constant temperature?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Types of Processes |
86%
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If an ideal gas undergoes two processes at constant volumes \(V_1~\text{and}~V_2\) as shown
in the pressure-temperature \((P\text-T)\) diagram, then:
1. \(V_1= V_2\)
2. \(V_1> V_2\)
3. \(V_1< V_2\)
4. \(V_1\ge V_2\)
Subtopic: Types of Processes |
82%
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An ideal gas at \(27^{\circ}\text{C}\) is compressed adiabatically to \(\frac{8}{27}\) of its original volume. If \(\gamma = \frac{5}{3},\) then the rise in temperature will be:
1. \(450~\text{K}\)
2. \(375~\text{K}\)
3. \(225~\text{K}\)
4. \(405~\text{K}\)
1. \(450~\text{K}\)
2. \(375~\text{K}\)
3. \(225~\text{K}\)
4. \(405~\text{K}\)
Subtopic: Types of Processes |
77%
From NCERT
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Which one of the following processes is reversible?
| 1. | Transfer of heat by radiation |
| 2. | Transfer of heat by conduction |
| 3. | Isothermal compression |
| 4. | Electrical heating of a nichrome wire |
Subtopic: Types of Processes |
77%
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AIPMT - 2005
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Given below are two statements:
| Statement I: | When \(\mu\) amount of an ideal gas undergoes adiabatic change from state \(\left({P}_1, {V}_1, {T}_1\right)\) to state \(\left({P}_2, {V}_2, {T}_2\right)\), the work done is \({W}=\dfrac{\mu{R}\left({T}_2-{T}_1\right)}{1-\gamma}\), where \(\gamma=\dfrac{C_P}{C_V}\) and \(R=\) universal gas constant, |
| Statement II: | In the above case, when work is done on the gas, the temperature of the gas would rise. |
| 1. | Both Statement I and Statement II are correct. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Statement I is correct, but statement II is incorrect. |
| 4. | Statement I is incorrect, but statement II is correct. |
Subtopic: Types of Processes |
75%
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JEE
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Can two isothermal curves cut each other?
| 1. | Never |
| 2. | Yes |
| 3. | They will cut when the temperature is 0°C. |
| 4. | Yes, when the pressure is equal to the critical pressure. |
Subtopic: Types of Processes |
78%
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The initial pressure and volume of a gas are \(P\) and \(V\), respectively. First, it is expanded isothermally to volume \(4V\) and then compressed adiabatically to volume \(V\). The final pressure of the gas will be: [Given: \(\gamma = 1.5\)]
| 1. | \(P\) | 2. | \(2P\) |
| 3. | \(4P\) | 4. | \(8P\) |
Subtopic: Types of Processes |
74%
From NCERT
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