to an aqueous solution containing anions ,a few drops of acidified kmno4 are added . which one of the following anions if present will decolourise the kmno4 solution?
1)Br- 2) CO3
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As we know, oxidation state of C in CO3−2is +4, which is maximum. So, it does not have any tendency to undergo oxidation and it will not able to reduce KMnO4. Therefore, it will not decolourise the KMnO4 solution.
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