passwella.
Menu

JAMB Chemistry 1985 Question 23

Question 23

Redox Reactions

2MnO4− + 10Cl− + 16H+ → 2Mn2+ + 5Cl2 + 8H2O. Which of the substances serves as an oxidizing agent?

  1. A.Mn2+
  2. B.Cl−
  3. C.H2O
  4. D.MnO4
  5. E.Cl2.
Show the answer and explanation

Answer: D (MnO4)

Explanation

Manganese goes from +7 in MnO4− to +2 in Mn2+, so the manganate (VII) ion is reduced. It takes electrons from Cl−, so it is the oxidising agent.