Question

What is the colour of Iron oxide?

Answer 1

1. Iron oxide (${\mathrm{Fe}}_2{\mathrm{CO}}_3$) is a chemical compound which consists of Iron and Oxygen with a molar mass of $159.687{\mathrm{gmol}}^{-1}$.
2. There are mainly three Iron ores as Wustite ($\mathrm{FeO}$), Hematite (${\mathrm{Fe}}_2{\mathrm{O}}_3$), and Magnetite (${\mathrm{Fe}}_3{\mathrm{O}}_4$) and Hematite is the most commonly used material.
3. The use of Iron oxide is to polish the surface into a fine finish and as a pigment in the paint and cosmetic industries.
4. The colours of the Iron ores are yellow, orange, red, brown, and black but Iron oxide is odourless and red-brown in colour which is insoluble in water.