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Sulphur dioxide acts as an oxidising agent as well as a reducing agent. Give one reaction each to show its oxidising nature and its reducing nature. - Chemistry (Theory)

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Question

Sulphur dioxide acts as an oxidising agent as well as a reducing agent. Give one reaction each to show its oxidising nature and its reducing nature.

Chemical Equations/Structures
Short Answer
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Solution

Sulphur dioxide as a reducing agent: Sulphur dioxide reduces potassium dichromate in an acidic medium.

\[\ce{K2Cr2O7 + 3SO2 + 4H2SO4 -> Cr2(SO4)3 + K2SO4 + 3H2O}\]

Sulphur dioxide as an oxidising agent: Sulphur dioxide oxidises hydrogen sulphide.

\[\ce{2H2S + SO2 -> 2S + 2H2O}\]

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Chapter 7: p-Block Elements - QUESTIONS FROM ISC EXAMINATION PAPERS [Page 460]

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Nootan Chemistry Part 1 and 2 [English] Class 12 ISC
Chapter 7 p-Block Elements
QUESTIONS FROM ISC EXAMINATION PAPERS | Q 11. | Page 460
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