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Part A
Indicate which reactions are redox reactions.
Check all that apply.
-S(s) + O2(g) → SO2(g)
-Cd(s) + Pb²+ (aq) → Cd²+ (aq) + Pb(s)
-2K(s) + I2₂(g) → 2KI(s)
-Ba(NO3)2 (aq) + ZnSO4 (aq) → BaSO4(s) + Zn(NO3)2 (aq)