In the reaction below, the oxidation number of the reducing agent changes from?

Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)

A. 0 to + 4
B. 0 to + 2
C. + 1 to + 2
D. + 1 to + 3

Correct Answer:

Option B = 0 to + 2

Zinc was oxidized, hence it lost 2e-