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"Heat cannot by itself flow from a body ...

"Heat cannot by itself flow from a body at lower temperature to a body at higher temperature" is a statement or consequence of

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Second law of thermodynamics.
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Heat energy flows from a body at ____ temperature to a body at _____ temperature.

Assertion : It is not possible for a system, unaided by an external agency to transfer heat from a body at lower temperature to another body at higher temperature. Reason : According to Clausius statement, “ No process is possible whose sole result is the transfer of heat from a cooled object to a hotter object

Assertion : First law of thermodynamics does not forbid flow of heat from lower temperature to higher temperature. Reason : Heat supplied to a system always equal to the increase in its internal energy.

Assetion : A refrigerator transfers heat from a lower temperature to a higher temperature. Reason: Heat cannot flow from a lower temperature to a higher temperature.

CBSE COMPLEMENTARY MATERIAL-THERMODYNAMICS -MULTIPLE CHOICE QUESTIONS (MCQs)
  1. "Heat cannot by itself flow from a body at lower temperature to a body...

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  2. An ideal gas undergoes for different processes from the same initial s...

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  3. An ideal gas undergoes cyclic process ACBC as shown is given PV diagra...

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  4. Consider two containers A and B containing identical gases at the same...

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  5. Which of the process described below are irrevesible?

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  6. An ideal gas undergoes isothermal process from some initial state i to...

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  7. (figure). Shows the P-V diagram of an ideal gas undergoing a change of...

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  8. A monatomic gas at a pressure P, having a volume V expands isothermall...

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  9. One mole of an ideal diatomic gas undergoes a transition from A to B a...

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  10. At 27^@C two moles of an ideal monatomic gas occupy a volume V. The ga...

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  11. In the above question, change in internal energy of gas is

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  12. P-V plots for two gases during adiabatic processes are shown in the fi...

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  13. The work of 146 kJ is performed in order to compress one kilo mole of ...

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  14. In V-T diagram shown in fig., what is the relation between P1 and P2 ?

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  15. The P-V diagram of a gas undergoing a cyclic process ABCDA is shown in...

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  16. During an adiabatic process, the pressure of a gas is found to be prop...

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  17. A body at a temperature of 727^(@)C and having surface area 5 cm^(2), ...

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  18. In a Carnot engine when T(2) = 0^(@)C and T(1) = 200^(@)C its efficien...

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  19. A Carnot engine, having an efficiency of eta=1//10 as heat engine, is ...

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  20. The door of a running refrigerator inside a room is left open. The cor...

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  21. If a piece of metal is heated to temperature theta and the allowed to ...

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