Which one of the following is an oxidation-reduction reaction?
- A.NaOH + HCl → NaCl + H2O
- B.CaO + H2O → Ca(OH)2
- C.2Mg + O2 → 2MgO
- D.Na2SO4 + BaCl2 → BaSO4 + 2NaCl
Show answer
When magnesium burns, magnesium loses electrons and is oxidised, while oxygen gains them and is reduced, so oxidation and reduction happen together.
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