1.

Which one is incorrect statement of the second law of thermodynamics ?A. It is impossible for a cyclic process to transfer heat from a system at a lower temperature to one at a higher temperature without converting some work to heatB. It is impossible to convert heat completely into equivalent amount of work without producing changes elsewhereC. Every perfect machine working reversibly between the same temperature of source and sink have the same efficiency whatever be the nature of the substance usedD. Heat engine can be made 100% efficient

Answer» Correct Answer - D
Heat engine cannot have 100% efficiency (2nd law}.


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