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JAMB Chemistry 1999 Question 25

Question 25

Sulphur and its Compounds

2SO2(g) + O2(g) ⇌ 2SO3(g). In the chemical reaction above, the substance that will increase the rate of production of sulphur (VI) oxide is

  1. A.manganese (IV) oxide
  2. B.finely divided iron
  3. C.vanadium (V) oxide
  4. D.nickel
Show the answer and explanation

Answer: C (vanadium (V) oxide)

Explanation

In the Contact process, vanadium(V) oxide is the catalyst for oxidizing SO2 to SO3. Iron is used in the Haber process and nickel for hydrogenation.