Zn → ZnSO4→ Zn ↓ ZnO → Zn(NO3)2

Question

Zn → ZnSO4→ Zn
↓
ZnO → Zn(NO3)2

Answer 1

1)Zn + SO4 = ZnSO4
ZnSO4 + Ba = Zn + BaSO4
2) Zn + O2 = ZnO
ZnO + HNO3 = Zn(NO3)2 + H2O