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Which of the following statement(s) is/a...

Which of the following statement(s) is/are correct ?
A] `ClO_2` and `ClO_3` are odd electronic paramagnetic species
B] When `KClO_3` is heated with conc. `HCl` gives mixture of gases liberated is called Euchlorin
C] `BrF_5` hydrolysis gives HF and `HBrO_3`
D] `F_2` oxidises `HSO_4^(-)` to `S_2O_7^(-2)`

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