Multiple choice

Redox reaction is when

  1. Oxidation reaction takes place

  2. Reduction reaction both takes place

  3. Oxidation and reduction both takes place together

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A redox reaction always involves both oxidation (loss of electrons) and reduction (gain of electrons) occurring simultaneously. Electrons lost by one species must be gained by another - they cannot exist freely. The term 'redox' itself comes from combining 'reduction' and 'oxidation'.

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