HydrogenhardMCQ MULTIPLE

The exceptionally high bond dissociation enthalpy of the bond () is responsible for which of the folHydrogen Chemistry Question

Question

The exceptionally high bond dissociation enthalpy of the $H-H$ bond ($435.88\text{ kJ mol}^{-1}$) is responsible for which of the following characteristics of dihydrogen?

Answer: A,B,C

💡 Solution & Explanation

Due to its high bond enthalpy, the $H-H$ bond is very stable, making $H_2$ unreactive at room temperature. Significant dissociation ($95.5\%$) only occurs at $5000\text{ K}$. Consequently, its reactions usually require high temperatures or catalysts. It is primarily a reducing agent, not an oxidizing agent.

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