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JAMB Chemistry 1988 Question 22

Question 22

Redox Reactions

Which of the following acts both as a reducing and an oxidizing agent?

  1. A.H2
  2. B.SO2
  3. C.H2S
  4. D.C
Show the answer and explanation

Answer: B (SO2)

Explanation

Sulphur in SO2 is +4, in the middle of its range. It can be oxidised to +6 (acting as a reducing agent) or reduced to 0, for example by H2S (acting as an oxidising agent).