To an acidic solution of an anion, a few drops of `Kmno_(4)` solution are added. Which of the
Channel: Doubtnut
Date: 12/07/2020

To an acidic solution of an anion, a few drops of `Kmno_(4)` solution are added. Which of the following, if present, will not decolourise the `KMnO_(4)` solution?