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Question

Which is the best description of the behaviour of bromine in the reaction given below?
H2O+Br2HOBr+HBr

A
Proton acceptor only
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B
Both oxidised and reduced
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C
Oxidised only
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D
Reduced only
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Solution

The correct option is B Both oxidised and reduced
H2O+0Br2HO+1Br+H1Br
In the above reaction, the oxidation number of Br2 increases from zero (in Br2) to +1 (in HOBr) and decreases from zero (in Br2) to 1 (in HBr). Thus, Br2 is oxidised as well as reduced and hence, it is a redox reaction.

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