- 1(current)
Q. No.In an adiabatic expansion, the temperature of one mole of an ideal monatomic gas \(\left ( \gamma =5/3 \right )\) decreases from \(60~\text{K}\) to \(50~\text{K}.\) The work done by the gas in the process is:
(take the universal gas constant as \(R=8.31\) mol-1 K-1)
1. \(166\) J
2. \(41.5\) J
3. \(83.1\) J
4. \(124.5\) J
(take the universal gas constant as \(R=8.31\) mol-1 K-1)
1. \(166\) J
2. \(41.5\) J
3. \(83.1\) J
4. \(124.5\) J
Subtopic: Â Work Done by a Gas |
 74%
Level 2: 60%+
NEET - 2026
Please attempt this question first.
Hints
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Two gases \(A\) and \(B\) are filled at the same pressure in separate cylinders with movable pistons of radius \(r_A\) and \(r_B,\) respectively. On supplying an equal amount of heat to both the systems reversibly under constant pressure, the pistons of gas \(A\) and \(B\) are displaced by \(16~ \text{cm}\) and \(9~ \text{cm},\) respectively. If the change in their internal energy is the same, then the ratio \(r_A / r_B\) is equal to:
| 1. | \(\dfrac{2}{\sqrt{3}}\) | 2. | \(\dfrac{\sqrt{3}}{2}\) |
| 3. | \(\dfrac{4}{3}\) | 4. | \(\dfrac{3}{4}\) |
Subtopic: Â Work Done by a Gas |
Level 3: 35%-60%
NEET - 2025
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Hints
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A thermodynamic system is taken through the cycle \(abcda.\) The work done by the gas along the path \(bc\) is:
| 1. | \(30~\text J\) | 2. | \(-90~\text J\) |
| 3. | \(-60~\text J\) | 4. | zero |
Subtopic: Â Work Done by a Gas |
 67%
Level 2: 60%+
NEET - 2024
Hints
For the given cycle, the work done during the isobaric process is:
| 1. | \(200\) J | 2. | zero |
| 3. | \(400\) J | 4. | \(600\) J |
Subtopic: Â Work Done by a Gas |
 58%
Level 3: 35%-60%
NEET - 2023
Hints
- 1(current)
Q. No.
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