(e) How do non-metals react with oxygen? Explain with an example. Give an equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?
(e) How do non-metals react with oxygen? Explain with an example. Give an equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?

(e) Acidic or neutral oxides are formed when non-metals react with oxygen. Carbon dioxide is produced when carbon is burned in the air.

C(s) + O2(g) → CO2(g)

The resulting product is acidic. Carbonic acid is formed when carbon dissolves in water, turning litmus crimson.