write balanced chemical equation
- iron is heated strongly in the air
- steam is passed over red hot iron
- aluminium is treated with dil. HCL
- Mg is treated with very dil. nitric acid
- ccalcium is heated in an atmosphere of hydrogen gas
1. 4Fe + 3O2 --heat--> 2Fe2O3
2. 3Fe + 4H2O => Fe3O4 + 4H2
3. 2Al + 6HCl => 2AlCl3 + 3H2
4. Mg + 2HNO3 => 2MgNO3 + H2
5. Ca + H2 --heat--> CaH2 (Calcium Hydride)