The Stability Order is As Follows:- Sigma has GreatestAfter That Double BondAnd Then Triple Bond

Bond strength and stability are not the same thing. If you will check the bond dissociation energies listed in your text, you will find that the C to C triple bond is stronger than the C to C double bond -- and it is in turn stronger than the C to C single bond. However, the triple bond represents a region of greater inter-atomic electron density than that of the double bond who's electron density is likewise greater than that of a single bond. This means that the electrons binding multiple bonded atoms are more vulnerable to attack by electron-seeking species. Attack by an elecrtophile is a very different process than that of simply pulling the atoms apart -- dissociation.A strong bond = higher bond orderTherefore, a high bond order is more stableUsually a bond order is how much bonds a molecule has. A molecule with a triple bond will have a bond order of 3. We all know that more bonds equal more bond strength. So you can basically assume that more bond order equals stronger bonds.i think it helps you