Oxidation and reduction
2 marks · NormalComplete the sentences about oxidation and reduction in terms of oxygen:
A substance is _______ if it gains oxygen, and it is _______ if it loses oxygen.
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oxidised, reduced
Also accept: oxidized, reduced
Common mistakes: reversal of words
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Marking points
B1 · 1 mark · Correctly completes oxidised for gains oxygen.
B2 · 1 mark · Correctly completes reduced for loses oxygen.
Worked solution
A substance is oxidised if it gains oxygen, and it is reduced if it loses oxygen.