GENERAL KNOWLEDGE

Detailed explanation-1: -It is a type of endothermic reaction whereas energy is released during bond formation thus it is an exothermic reaction . When a bond is formed the energetic electrons lose energy as they move from high to low energy and form bonds. The system loses energy when bonds are created, hence increasing the stability.

Detailed explanation-2: -When a bond is formed, the energy equals the bond energy negative (energy is released). Bond energy is the measure of a bond’s strength; the bigger the bond energy, the stronger the chemical bond. If the bond energy of a chemical bond is negative, the bond cannot exist because it will be too unstable.