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At room temperature, Hydrogen reacts ver...

At room temperature, Hydrogen reacts very Slowly. Explain (HOTS)

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In elementary state, Hydrogen exist as a diatomic molecule. The bond between two hydrogen atoms H-H is covalent. The bond dissociation energy is very high `(435.9 Kjmol^(-1))`. So bond cleavage is extremely difficult, so hydrogen is less reactive at room temperature.
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