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Question

Choose the correct option regarding change in oxidation number of the underlined atom in the following conversion.

2NaOH+Br2––NaBr+NaBrO+H2O

A
Decreases to 1 w.r.t NaBr and increases to 3 w.r.t NaBrO
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B
Decreases to 1 w.r.t NaBr and increases to +2 w.r.t NaBrO
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C
Decreases to 1 w.r.t NaBr and increases to +1 w.r.t NaBrO
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D
Decreases to 2 w.r.t NaBr and increases to +1 w.r.t NaBrO
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Solution

The correct option is C Decreases to 1 w.r.t NaBr and increases to +1 w.r.t NaBrO
The oxidation number of bromine in Br2,NaBr and NaBrO is 0,1 and +1 respectively.
Hence, during the reaction, the oxidation number of bromine in Br2 decreases to 1 w.r.t NaBr and increases to +1 w.r.t NaBrO.
Thus, the correct option will be C.

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