Distinguish between a sigma and a pi bond.

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The following are the differences between sigma and pi-bonds:						Sigma $(\sigma)$ Bond			Pi $(\pi)$ Bond							$(a)$ It is formed by the end-to-end

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The following are the differences between sigma and pi-bonds:

Sigma $(\sigma)$ Bond	Pi $(\pi)$ Bond
$(a)$ It is formed by the end-to-end overlap of orbitals.	$(a)$ It is formed by the lateral overlap of orbitals.
$(b)$ The orbitals involved in the overlapping are $s-s, s-p,$ or $p-p$.	$(b)$ These bonds are formed by the overlap of $p-p$ orbitals only.
$(c)$ It is a strong bond.	$(c)$ It is a weak bond.
$(d)$ The electron cloud is symmetrical about the line joining the two nuclei.	$(d)$ The electron cloud is not symmetrical about the internuclear axis.
$(e)$ It consists of one electron cloud,which is symmetrical about the internuclear axis.	$(e)$ There are two electron clouds lying above and below the plane of the atomic nuclei.
$(f)$ Free rotation about $\sigma$ bonds is possible.	$(f)$ Rotation is restricted in case of $\pi$ bonds.

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