Write a note on geometrical isomerism.

Explanation

The compounds having same structural formulae but differ in the spatial arrangement of atoms or groups around C = C double bond, are known as geometrical isomers. Thus phenomenon is known as geometrical isomerism.
Causes of geometrical isomerism
Geometrical isomerism is due to the restricted or hindered rotation around the C=C bond. Here each carbon atom is `sp^2` hybridised. Pi(`pi`) -electron cloud breaks if we rotate the atoms around the double bond. Therefore, rotation around double bond is restricted.