a
Graphite
b
Diamond
c
Lampblack
d
Soot
Explanation
Correct Option
aVideo Explanation
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Discussions (7)

Miracle5284
9 years ago
Here is an explanation:
Carbon have two major allotrope which are Diamond and graphite. diamond is very hard to be drawn into pencils and its octahedral structure is not supportive; only graphite have the suitable characteristics to be drawn in to pencils with other materials because it is soft by its hexagonal crystal lattice structure in nature.

King33Victor
3 weeks ago
with no doubt, A is very correct
crucible is also another constituent of graphite.
have a good day



