Question

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

Answer 1

Answer:

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.