Which of the following equations represents an oxidizing action of sulphur dioxide?
SO2 + 2HNO2 → H2SO4 + 2NO2 + heat
2SO2 + 2H2O + O2 → 2H2SO4
SO2 + 2H2O + CI2 → H2SO4 + 2HCI
SO2 + 2H2S → 3S + 2H2O
K2Cr2O7 + H2SO4 + 3SO2 → K2SO4 + Cr2(SO4)3 + H2O
Explanation
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Discussions (8)

Here is an explanation:
Oxidation Is D Additon Of Oxygen, In D Above, Hydrogen is oxidized 2 Water (since Oxygen Is Added 2 It) While SO2 is been reduced (oxygen has been removed 4rm it) in such reaction SO2 is describe as thex oxidizing agent and H2 the reducing agent
REF: Essential Chemistry Page 173

oxidizing action simply means acting as an oxidising agent,since in option C SO2 is being reduced,it therefore acts as an oxidising agent

The question is specifically asking for the Oxidation reaction of SO2 not the whole equation so I think none of the answers are correct ❌
Even by considering option D' , SO2 is reduced and 2H2S is oxidized but remember the question is specific and not generalized by the whole question
Also Note: Oxidation (gain of oxygen, loss of Hydrogen, loss of electron)
Reduction (loss of Oxygen, gain of Hydrogen, gain of electron)

