Question

Explain the effect of high bond dissociation energy of H-H bond on chemical reactivity of dihydrogen?

Answer 1

• The bond dissociation energy of H-H bond is very high i.e, 436 kJ mol^-1 . and thus, it does not react easily under normal conditions.
• However, at high temperature or in the presence of catalysts, hydrogen combines with many metals and nonmetals to form corresponding hydrides and halides respectively.