In which of the following reactions sulphur dioxide is not behaving as a reducing agent?

Foundation

Chemistry Foundation

Redox Reactions

Question

Both (A) & (B)

SO₂ + H₂O → H₂SO₃

SO₂ + 2H₂S → 3S + 2H₂O

K₂Cr₂O7 + H₂SO₄ + 3SO₂ → K₂SO₄ + Cr₂(SO4)₃ + H₂O

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In the reaction (A) SO₂ is not reducing or oxidising.
In the reaction (B) SO₂ is reducing in S and behaving as an oxidising agent.
In the reaction (D) SO₂ is oxidising in SO₄^–2 and behaving as reducing agent.