Redox Reactions And Electrochemistry Ques 530
Question: Which is the best description of the behaviour of bromine in the reaction given below $ H_2O+Br_2\to HOBr+HBr $ [CBSE PMT 2004]
Options:
A) Oxidised only
B) Reduced only
C) Proton acceptor only
D) Both oxidised and reduced
Show Answer
Answer:
Correct Answer: D
Solution:
$ H_2O+\underset{0}{\mathop{Br_2}},\xrightarrow{{}},\underset{+1}{\mathop{HOBr}},+\underset{-1}{\mathop{HBr}}, $
In the above reaction the oxidation number of $ Br_2 $ increases from zero (in $ Br_2 $ ) to +1 (in $ HOBr $ ) and decrease from zero ( $ Br_2 $ ) to - 1 (in $ HBr $ ). Thus $ Br_2 $ is oxidised as well as reduced & hence it is a redox reaction.
