What are some important uses of iron and its compounds?

Uses of Iron

1. Metallic Iron:
   • Used in buildings, bridges, machines, cars, and railway tracks.
   • Used to make tools and kitchen utensils.
2. Iron Compounds:
   • Iron(III) oxide: Used in paints and pigments.
   • Ferrous sulfate: Treats iron-deficiency anemia.
   • Ferric chloride: Used in water purification.
   • Iron salts: Added to fertilizers.
   • Iron carbonyl: Used in industrial chemicals and catalysts.

In short:
Iron is used for construction, tools, and machines, while its compounds are used in medicine, water treatment, agriculture, and industry.