Question
Give the name of allotrope of carbon which:
(i) is the hardest substance known
(ii) is used by artists in pencils
(iii) has the property of adsorbing gases
(iv) is used for making electrodes
(v) is used for absorbing organic colouring matter.
(vi) is used in the manufacturing of boot polishes.
Solution
(i) Diamond
(ii) Graphite
(iii) Charcoal
(iv) Graphite
(v) Animal charcoal
(vi) Lamp black
