What is the state of hybridisation of carbon in
Question:

What is the state of hybridisation of carbon in

(a) $\mathrm{CO}_{3}^{2-}$

(b) diamond

(c) graphite?

Solution:

The state of hybridisation of carbon in:

(a) $\mathrm{CO}_{3}^{2-}$

$\mathrm{C}$ in $\mathrm{CO}_{3}^{2-}$ is $s p^{2}$ hybridised and is bonded to three oxygen atoms.

(b) Diamond

Each carbon in diamond is sphybridised and is bound to four other carbon atoms.

(c) Graphite

Each carbon atom in graphite is sp2 hybridised and is bound to three other carbon atoms.