Sigma Bond Vs Pi Bond

Sigma (σ) Bond	Pi (π) Bond
A sigma bond is formed by the end to end filled atomic orbitals along the internuclear axis. The overlapping involves two s-orbitals, one s and p-orbital or two p-orbitals.	A pi-bond is formed by the sidewise overlap of two half-filled p-orbitals.
In this case, the overlapping can take place to a larger extent and therefore, the bond formed is a strong bond.	In the formation of π-bond the overlapping occurs to a lesser extent and therefore, the bond is weak.
The molecular orbital is symmetrical about the internuclear axis.	The molecular orbital is discontinuous and consists of two charged clouds above and below the plane of atoms.
There can be free rotation of atoms around the σ-bond.	Because of overlapping of the electron clouds above and below the plane of the atoms, free rotation of atoms around π-bond is not possible.
The bond may be present between two atoms either alone or along with π-bond.	The bond is always present between two atoms in addition to sigma bond.
In the formation of sigma bond, s-orbitals can participate.	s-orbitals cannot participate in the formation of pi-bond.