Question

Which of the following non-metal shows an exceptional physical property?

• A. Graphite
• B. Nitrogen
• C. Sulphur
• D. Chlorine

Answer 1

The correct option is A

Graphite

Physical Properties of non-metals

(i) Non-metals are generally bad conductor of heat and electricity.Non-metals do not conduct the electric current due to absent of free or mobile electrons.

Exception : Graphite is a good conductor of electricity.

(ii) Non-metals are generally soft. (Exception : Diamond is the hardest natural substance.)

(iii) Non-metals have low melting and boiling points. (Exception : Graphite has very high melting point (i.e. 3730 ${}^{\circ }$C).)

(iv) Non-metals have low density. (Exception: Diamond has high density.)