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Which of the following equations represents an oxidizing action of sulphur dioxide?

Chemistry
JAMB 1982

Which of the following equations represents an oxidizing action of sulphur dioxide?

  • A. SO2 + 2HNO2 → H2SO4 + 2NO2 + heat
  • B. 2SO2 + 2H2O + O2 → 2H2SO4
  • C. SO2 + 2H2O + CI2 → H2SO4 + 2HCI
  • D. SO2 + 2H2S → 3S + 2H2O
  • E. K2Cr2O7 + H2SO4 + 3SO2 → K2SO4 + Cr2(SO4)3 + H2O
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Correct Answer: Option D
Explanation

Option D is the correct answer.

In this reaction, sulphur dioxide (SO\(_2\)) acts as an oxidizing agent because it removes electrons from (oxidizes) H\(_2\)S while itself being reduced. 

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