Question

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.

(i) Identify A, B and C.

(ii) To which group of periodic table does A belong?

Answer 1

(i) A = Carbon (C), B = Carbon monoxide (CO), C = Carbon dioxide (CO₂).

(ii) Carbon (or A) has atomic number = 6

Its electronic configuration is 2, 4. It is present in 14^th group (10 + valence electron) of the periodic table.