taste of sulphur dioxide
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Explanation:
Test tubes containing dilute acidified potassium manganate (VII) solution (left) and potassium manganate (VII) solution that has been decoloured by sulphur dioxide gas (right). As sulphur dioxide de-colours potassium manganate (VII) solution, this reaction can be used as a test for the presence of sulphur dioxide.
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sulphur dioxide changes the colour of acidified pottasium dichromate solution from orange to green
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