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If hydrogen is added to a substance, which process is it generally called?

Answer and explanation

Correct answer: Reduction

Addition of hydrogen to a substance is generally called reduction. For example, when hydrogen reacts with copper(II) oxide, oxygen is removed and copper is formed: \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\). In contrast, oxidation generally involves addition of oxygen or removal of hydrogen.

Related tags

ScienceClass 10Chemical ReactionsReductionOxidationHydrogen Addition

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