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Civil Superior Services — Complete MCQ Bank

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CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.

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51
Physics Medium

Which law of thermodynamics states that energy cannot be created or destroyed only converted from one form to another?

  • AZeroth Law
  • BSecond Law
  • CThird Law
  • DFirst Law
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Correct Answer: Option D — First Law
Explanation: The First Law of Thermodynamics also known as the Law of Conservation of Energy states that energy cannot be created or destroyed but only converted from one form to another.
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