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Question: Answered & Verified by Expert
Which one of the following process is non-spontaneous?
ChemistryThermodynamics (C)JEE Main
Options:
  • A Dissolution of \( \mathrm{CuSO}_{4} \) in water.
  • B Reaction between \( \mathrm{H}_{2} \) and \( \mathrm{O}_{2} \) to form water.
  • C Water flowing down hill.
  • D Flow of electric current from low potential to high potential
Solution:
1162 Upvotes Verified Answer
The correct answer is: Flow of electric current from low potential to high potential

The physical or chemical processes which do not proceed by its own in a particular direction and requires outside help is called a non-spontaneous process.

Therefore, flow of heat from a cold body to hot body is a non-spontaneous process as it requires external work.

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