Name a non- metal:
(a) which is lustrous
(b) which is required for combustion
( c) whose one of the allotropic forms is a good conductor of electricity ,Name the allotrope.
(d) other than carbon which shows allotropy
( e) which is known to from the largest number of compounds

Explanation

(a) iodine (b) oxygen (c) carbon ; graphite (d) sulphur (e) carbon