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What is the correct order of the processes in which hydrogen is removed from a substance and then added to a substance?

Answer and explanation

Correct answer: Oxidation and reduction

In the classical description of redox processes, removal of hydrogen from a substance is oxidation, while addition of hydrogen is reduction. The question asks for these processes in that exact order: first hydrogen is removed, so oxidation occurs; then hydrogen is added, so reduction occurs. Consequently, option D is correct. Option A contains the same two terms but reverses their order, and the other options name unrelated reaction types.

Related tags

OxidationReductionHydrogen TransferRedox ReactionsChemical ReactionsChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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