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When oxygen is removed from a substance, what does the substance generally undergo?

Answer and explanation

Correct answer: Reduction

Removal of oxygen from a substance is called reduction. For example, in the reaction CuO + H₂ → Cu + H₂O, copper(II) oxide loses oxygen and is reduced to copper. Oxidation is the opposite idea when oxygen is added. Neutralisation concerns acid-base reactions, and decomposition describes one compound splitting into simpler substances, so neither is the best answer.

Related tags

Class 10 ScienceReductionOxidationRedox ReactionsChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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