Describe the change in hybridisation (if any) of the Al atom in the following reaction.

Answer:

The hybridization of Al atom alters from in to in .
In , Al contains 3 bond pairs of electrons and zero lone pair of electrons. Hence, it is sp hybridized.

In atom has four electron bond pairs and no electron lone pairs, resulting in a total of four electron bond pairs.
Hence, it is hybridized.

Thus, sp² hybridization is converted into sp³ hybridization and results a tetrahedral structure.