Question

Acidified potassium permanganate solution is decolourised by

Answer 1

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Alkenes react with potassium manganate(VII) solution in the cold. The colour change depends on whether the potassium manganate(VII) is used under acidic or alkaline conditions. If the potassium manganate(VII) solution is acidifiedwith dilute sulphuric acid, the purplesolution becomes colourless.

Answer 2

Alkenes react with potassium manganate(VII) solution in the cold. The colour change depends on whether the potassium manganate(VII) is used under acidic oralkaline conditions. If the potassium manganate(VII) solution is acidifiedwith dilute sulphuric acid, the purplesolution becomes colourless.