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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
Which one of the following process is non-spontaneous
  • A
    Dissolution of $CuS{O_4}$ in water
  • B
    Reaction between ${H_2}$ and ${O_2}$ to form water
  • C
    Water flowing down hill
  • ✓
    Flow of electric current from low potential to high potential
✓

Answer

Correct option: D.
Flow of electric current from low potential to high potential
d
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 a hot body is a nonspontaneous process as it requires external work as per Clausius

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