Question

1)K→K2O→KOH→KCI
2)Zn→ZnO→ZnCI2
↓NA2ZNO2
3) FE→FE2O3→FE (NO3)3→FESO4

Answer 1

4K+O2=2K2O
K2O+H2O=2KOH
KOH+HCL=KCl+H2O

2Zn+O2=2ZnO
ZnO+2HCl=ZnCL2+H2
Zn+2NaOH+H2O=Na2ZnO2+2H2O

4Fe+3O2=2Fe2O3
Fe2O3+6HNO3=2Fe(NO3)3+3H2O