1.

To an acid solution of an anion a few drops of \[KMn{{O}_{4}}\] solution are added. Which of the following, if present will not decolourise the \[KMn{{O}_{4}}\] solution [MP PMT 1997]

A. \[NO_{2}^{-}\]
B. \[{{S}^{2-}}\]
C. \[C{{l}^{-}}\]
D. \[CO_{3}^{2-}\]
Answer» E.


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