What is meant by hybridisation ? Compound `CH_(2)=C=CH_(2)` contains `sp` or `sp^(2)` hybridised carbon atoms. Will it be a planar molecule ?

Explanation

N/A

Central carbon atom is sp hybridised and its two unhybridised p -orbitals are perpendicular to each other. The p-orbitals in one plane overlap with one of the p-orbitals of left terminal carbon atom and the p-orbital in other plane overlaps with p-orbital of right side terminal carbon atom. As a result, the position of two terminal carbon atoms and the hydrogen atoms attached to them are fixed in planes perpendicular to each other. Therefore, the pair of hydrogen atoms attached to terminal carbon atoms are present in different planes and hence molecule is not planar.