Discuss the consequences of high enthalpy of H-H bond in terms of chemical reactivity of dihydrogen.

Explanation

H-H bond length is very small (74 pm) because H-atom has very small atomic size. Consequently, H-H bond dissociation enthalpy is very high (435.9 kJ`cdot mol^(-1)` ) which makes hydrogen completely inert at ordinary temperature. However, at higher temperatures, H-H bond undergoes dissociation in presence of catalyst to from hydrides with metals & non-metals.