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Which one of the following statements about dihydrogen (H₂) is not correct?

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Options

H₂ is lighter than air and insoluble in water.

H₂ is inert at room temperature due to high H – H bond dissociation enthalpy.

H₂ reacts with alkali metals at high temperature to yield metal hydrides.

A mixture of NO₂ and H₂ is known as Syngas

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