Zn > ZnO > Zn (NO3) 2 > ZnS Ca > CaO > Ca (OH)2 > CaCEn

Question

Zn > ZnO > Zn (NO3) 2 > ZnS
Ca > CaO > Ca (OH)2 > CaCEn

---

Answer 1

Zn+ O>ZnO
2ZnO+2HNO3>Zn(NO3)2
Zn(NO3)2+H2S>ZnS+2HNO3