Question on: JAMB Chemistry - 2002

CU2S(s) + O2(g) → 2CU(s) + SO2(g)

What is the change in the oxidation number of copper in the reaction above?

A
+1 to 0
B
0 to +2
C
+2 to +1
D
0 to +1
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Correct Option: A

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