Question

Choose the correct statement:

• A. Both diamond and graphite are used as dry lubricants.
• B. Diamond and graphite have two dimensional network.
• C. Diamond is covalent and graphite is ionic.
• D. Diamond is $s p^{3}$ hybridised and graphite is $s p^{2}$ hybridized.

Answer 1

Answer: (D)

In diamond each carbon is bonded with four other carbon atoms. So hybridisation of carbon atom is $sp ^{3}$.
In graphite each carbon is bonded with three other carbon atoms. So hybridisation of carbon atom is $sp ^{2}$.