Question

Which of the following is not true about structure of diamond and graphite?

• A. In diamond, each carbon is $s{p}^3$ hybridised while in graphite each carbon is $s{p}^2$ hybridised.
• B. In diamond, carbon atoms are closely packed in crystal lattice while graphite has layer structure.
• C. Diamond is a hard substance while graphite is a soft substance.
• D. Graphite is thermodynamically very less stable as compared to diamond and is amorphous form of carbon.

Answer 1

Answer: (D)

Answer:-

In graphite, carbon is $s{p}^2$ hybridised and possess free electron which is delocalised through it makes more conjugation

In diamond, carbon is $s{p}^3$ hybridised and there is no free electrons.

Delocalisation makes graphite more stable than diamond.

Thus, graphite is thermodynamically more stable than diamond.