Question & Answer: In which substance does bromine have an oxidation number of +1? A. Br_2 B. HBr C. HBrO D……

3)

Oxidation number of Bromine is +1 in HBrO ( Option C is the answer)

calculation:

oxidation state of O is -2

Oxidation state of H is +1

Sum of the oxidation state must be equal to Zero , let x be the oxidation state (number) of Br

1 + x – 2 = 0

x = +1

Let examine the other oprions:

Br₂ it is Zero

HBr it is -1 as H is +1

HBrO₂ , 1 + x – 4 =0 , x = +3