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Which one of the followings an oxidation-reduction reaction?

Options

  1. ANaOH + HCl NaCl + H ₂ O
  2. BCaO + H ₂ O Ca ( OH )₂
  3. C2 Mg + O ₂ 2 MgO
  4. DNa ₂ SO ₄+ BaCl ₂ BaSO ₄+2 NaCl

Correct answer

C. 2 Mg + O ₂ 2 MgO

Step-by-step solution

An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

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