MCQ
In the conversion $B{r_2}\, \to \,BrO_3^ - ,$ the oxidation state of bromine changes from
- A$-1 $ to $ -1$
- B$0 $ to $-1$
- ✓$0 $ to $+ 5$
- D$0$ to $- 5$
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$x\ MnO + y\ PbO_2 + z\ HNO_3 \to a\ HMnO_4 + b\ Pb(NO_3 )_2 + c\ H_2O$
