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Q. No.Given below are two statements:
| Assertion (A): | It is not possible for a system, unaided by an external agency to transfer heat from a body at a lower temperature to another at a higher temperature. |
| Reason (R): | It is not possible to violate the second law of thermodynamics. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Second Law of Thermodynamics |
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The second law of thermodynamics says:
| 1. | the efficiency of a heat engine can be unity. |
| 2. | the heat released to the cold reservoir can be made zero. |
| 3. | coefficient of performance can never be infinite for refrigerators. |
| 4. | none of the above. |
Subtopic: Â Second Law of Thermodynamics |
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The lowest possible temperature is:
| 1. | \(0^\circ\text{C}\) | 2. | \(0^\circ \text{F}\) |
| 3. | \(-173^\circ \text{C}\) | 4. | \(0 ~\text{K}\) |
Subtopic: Â Second Law of Thermodynamics |
 80%
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