Q. The hardest form of carbon is

A
Graphite
B
Diamond
C
Charcoal
D
Coke
Solution:

Diamond is currently thought to be the hardest natural material on Earth, having a hardness of ten out of ten on the Mohs scale of mineral hardness. Diamond is made up of carbon atoms which share strong covalent bonds (where electrons are shared between atoms) and are equally spaced in a lattice arrangement.

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