Which balanced equation, represents a redox reaction?

a) AgNO3+NaCl ---> AgCl+NaNO3
b) BaCl2+K2CO3 ---> BaCO3+2KCl
c)CuO+CO ---> Cu+CO2
d)HCl+KOH ---> KCl+H2O

why??

Answer:
C copper is reduced carbon monoxide is oxidized to CO2
letter c is your best answer because the other options are examples of a double displacement reaction.and if you observe closely, the copper oxide is being reduced or oxidized to copper with carbon dioxide being released.

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