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?

To an acid 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

To an acidic solution of anion a few drops of acidified KMnO_(4) are added. Which one of the following anions , if present wil not decolourise the KMnO_(4) solutions ?

To an aq. Solution containing anions a few drops of acidified KMnO_(4) are added Which one of the following anions if present will not decolourise the KMnO_(4) solution?

Which one of the following compounds can decolourise alkanes KMnO_(4) solution?

Which one of the following compounds can decolourise alkanes KMnO_(4) solution?