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Part 1 Which of the following is a redox reaction?

a. H2CO3 (aq) + 2NH3 (aq) → 2NH4+ (aq) + CO32- (aq)

b. 2VO3- (aq) + Zn (s) + 8H+ (aq) → 2VO2+ (aq) + Zn2+ (aq) + 4H2O (l)

d. Zn(NO) (aq) + 2NaOH (aq) → Zn(OH) (s) + 2NaNO (aq)

part 2 For the redox reaction in part 1 , which substance is oxidized? Which is reduced?

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