In the following figures, four curves A, B, C and D, are shown. The curves are:

        

1. isothermal for A and D while adiabatic for B and C.
2. adiabatic for A and C while isothermal for B and D.
3. isothermal for A and B while adiabatic for C and D.
4. isothermal for A and C while adiabatic for B and D.

Subtopic:  Types of Processes |
 73%
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When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is?

1. \(2 \over 5\) 2. \(3 \over 5\)
3. \(3 \over 7\) 4. \(5 \over 7\)
Subtopic:  Molar Specific Heat |
 70%
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In a cyclic process, the internal energy of the gas:

1. Increases 2. Decreases
3. Remains constant 4. Becomes zero
Subtopic:  Cyclic Process |
 54%
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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%
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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%
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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%
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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%
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NEET - 2009
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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%
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NEET - 2012
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Thermodynamic processes are indicated in the following diagram.
          
Match the following:

Column I Column II
P.   Process-I        a.    Adiabatic      
Q. Process-II  b. Isobaric
R. Process-III  c. Isochoric
S. Process-IV 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. \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow a\)
4. \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow a\)
Subtopic:  Types of Processes |
 87%
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NEET - 2017
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A sample of \(0.1\) g of water at \(100^{\circ}\mathrm{C}\) and normal pressure (\(1.013 \times10^5\) N m–2) requires \(54\) cal of heat energy to convert it into steam at \(100^{\circ}\mathrm{C}\). If the volume of the steam produced is \(167.1\) cc, then the change in internal energy of the sample will be:
1. \(104.3\) J
2. \(208.7\) J
3. \(42.2\) J
4. \(84.5\) J

Subtopic:  First Law of Thermodynamics |
 69%
From NCERT
NEET - 2018
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