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JAMB Chemistry 1983 Question 31

Question 31

Nitrogen and its Compounds

Which of the following pair of gases will NOT react further with oxygen at a temperature between 30°C and 400°C?

  1. A.SO2 and NH3
  2. B.CO2 and H2
  3. C.NO2 and SO3
  4. D.SO3 and NO
  5. E.CO and H2.
Show the answer and explanation

Answer: C (NO2 and SO3)

Explanation

NO2 and SO3 are already the stable higher oxides and do not take up more oxygen. NO, CO, H2, NH3 and SO2 can all be oxidised further.