The purity of H2O2 in a given sample is ...

The purity of `H_2O_2` in a given sample is `85%.` Calculate the weight of impure sample of `H_2O_2` which requires `10mL` of `M//5 KMnO_4` solution in a titration in acidic medium

0.2g

0.17g

0.15g

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