passwella.
Menu

JAMB Chemistry 2012 Question 24

Question 24

Redox Reactions

2Na2O2(s) + 2H2O(l) → 4NaOH(s) + O2(s)
The substance that is oxidized in the reaction above is

  1. A.Na2O2(s)
  2. B.NaOH(aq)
  3. C.H2O(l)
  4. D.O2(g)
Show the answer and explanation

Answer: A (Na2O2(s))

Explanation

Oxygen in the peroxide is −1; some of it rises to 0 in O2, so Na2O2 is oxidized (and also reduced, to −2 in NaOH).