Indicate in each reaction which one is oxidised or reduced if any:
2NaBr+Cl2→2NaCl+Br2
In the above reaction, which one of the following is oxidised?
A
NaBr
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B
Br2
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C
Cl2
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D
None of these
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Solution
The correct option is ANaBr The oxidation number of bromine changes from -1 (in NaBr) to 0 (in Br2). Thus, NaBr is oxidized. The oxidation number of chlorine changes from 0 to -1. Thus, chlorine is reduced.