Which one of the following process is non-spontaneous

1.	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
D.	Flow of electric current from low potential to high potential
Answer» E.

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Which one of the following process is non-spontaneous

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