Diamond and graphite are two naturally occurring forms of the element carbon.
Hence, the given statement holds true.
Write 'true' or 'false' against the following statements :
(a) Carbon constitutes 0.03% of the earth's crust.
(b) Graphite is the purest form of carbon.
(c) Coloured diamonds are costlier than colourless and transparent diamonds.
(d) Graphite has layers of hexagonal carbon bondings.
(e) Diamond is insoluble in all solvents.
Differentiate between:
(a) The crystalline and non-crystalline or amorphous forms of carbon.
(b) Diamond and graphite.