Question

Identify the compounds which are reduced and oxidized in the following reaction:

$3N_{2}H_{2} + 2BrO_{3}^{-} \rightarrow 3N_{2} + 2Hr^{-} + 6H_{2}O$

• A. $N_{2}H_{4}$is oxidized and $BrO_{3}^{-}$is reduced.
• B. $BrO_{3}^{-}$is oxidized and $N_{2}H_{4}$is reduced.
• C. $BrO_{3}^{-}$ is both reduced and oxidised.
• D. This is not a redox reaction.

Answer 1

Answer: (A)

$N_{2}H_{4}$is oxidized and $BrO_{3}^{-}$is reduced.

Answer 2

: $3\overset{- 2}{N_{2}}H_{4} + 2\overset{+ 5}{Br}O_{3}^{-} \rightarrow 3\overset{0}{N_{2}} + 2\overset{- 1}{Br^{-}} + 6H_{2}O$