- 1(current)
Q. No.An ideal gas undergoes four different processes from the same initial state (figure). Four processes are adiabatic, isothermal, isobaric and isochoric. Out of \(1,\) \(2,\) \(3\) and \(4,\) which one is adiabatic?
| 1. | \(4\) | 2. | \(3\) |
| 3. | \(2\) | 4. | \(1\) |
Subtopic: Â Types of Processes |
 85%
Level 1: 80%+
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Consider the \((P\text-V)\) diagram for an ideal gas shown in the figure.
Out of the following diagrams, which figure represents the \((T\text-P)\) diagram?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Â Types of Processes |
 59%
Level 3: 35%-60%
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Which of the processes described below are irreversible?
Choose the correct alternative/s:
| (a) | The increase in temperature of an iron rod by hammering it. |
| (b) | A gas in a small container at a temperature \(T_1\) is brought in contact with a big reservoir at a higher temperature \(T_2\) which increases the temperature of the gas. |
| (c) | A quasi-static isothermal expansion of an ideal gas in a cylinder fitted with a frictionless piston. |
| (d) | An ideal gas is enclosed in a piston-cylinder arrangement with adiabatic walls. A weight \(w\) is added to the piston, resulting in the compression of gas. |
| 1. | (a), (b), (c) | 2. | (a), (d) |
| 3. | (b), (c), (d) | 4. | (a), (b), (d) |
Subtopic: Â Types of Processes |
Level 3: 35%-60%
Hints
Consider two containers A and B containing identical gases at the same pressure, volume and temperature. The gas in container A is compressed to half of its original volume isothermally while the gas in container B is compressed to half of its original value adiabatically. The ratio of final pressure of gas in B to that of gas in A is
1. \(2^{\gamma-1} \)
2. \(\left(\frac{1}{2}\right)^{\gamma-1} \)
3. \(\left(\frac{1}{1-\gamma}\right)^2 \)
4. \(\left(\frac{1}{\gamma-1}\right)^2\)
1. \(2^{\gamma-1} \)
2. \(\left(\frac{1}{2}\right)^{\gamma-1} \)
3. \(\left(\frac{1}{1-\gamma}\right)^2 \)
4. \(\left(\frac{1}{\gamma-1}\right)^2\)
Subtopic: Â Types of Processes |
 70%
Level 2: 60%+
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