Question

No bond resonance invloves sigma bond pair or pi bond pair??

Answer 1

No, there are some bond resonance which involves

refer to this attachment..

Answer 2

hola mate

The sigma-bond is defined as the linear overlap of atomic orbitals (hybrids except for hydrogen) in which two electrons are directly between the two bonded nuclei. Pi-bonds are defined as the parallel overlap of p-orbitals. A double bond has one sigma-bondand one pi-bond.

hope it helps