All the given species have the same charge except peroxide.
<h3>Charges on ions</h3>- The charge on monohydrogen phosphate is negative because of its formula,
.
- The charge on permanganate is negative. The formula is
- The charge of oxide (
) is negative.
- The charge on peroxide is ( R−O−O−R) is neutral.
- The charge on oxalate,
, is negative.
Thus, only peroxide is unique.
More on charges on ions can be found here: brainly.com/question/11938054
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