A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming

(a) Identify A, B and C

(b) To which Group of periodic table A belongs?

(a) A is Carbon (C). B is Carbon monoxide (CO). C is Carbon dioxide (CO₂).

(b) Carbon belongs to group 14.

NOTE: Carbon is a non-metal. Carbon monoxide is formed due to the combustion of carbon in limited supply of air. Carbon dioxide is formed due to combustion of carbon in excess supply of air.