Question

In conversion of Br2 to BrO3-, the oxidation no. of Br changes from.....?

Answer 1

In conversion of Br2 to BrO3- the oxidation number of Br changes from 0 in Br2 to +5 in  BrO3- 

{ let x be the oxidation number of Br, then x+3(-2) =-1 , x-6 =-1, x =-1+6 , x =+5}
The reaction is :

OH-+Br2 -----> Br-+BrO3 -+H2O

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