The gas which decolourise acidified kmn o4 solution and deposits sulphur particles
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Acidified KMnO4 can be decolorized by SO2.Potassium permanganate(KMnO4) has a purple colour. Sulphur dioxide is a reducing agent. Potassium permanganate is an oxidizing agent. When sulphur dioxide reacts with potassium permanganate the solution decolourizes. colour changes from Purple to transparent(Colourless).
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