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Which pair shows oxidation first and reduction second?

Answer and explanation

Correct answer: Addition of oxygen and removal of oxygen

At this level, oxidation is identified by the addition of oxygen, whereas reduction is identified by the removal of oxygen. The required sequence is therefore addition of oxygen first and removal of oxygen second, which is exactly option A. Option B reverses the order. The processes in option D are physical changes, not oxidation-reduction definitions.

Related tags

ScienceClass10OxidationReductionChemical ReactionsChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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