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Question

For the half cell reaction,
2BrO3+12H++10eBr2+6H2O
the equivalent mass of sodium bromate is

A
Equal to its mol. mass
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B
1/3 of its mol. mass
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C
1/6 of its mol. mass
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D
1/5 of its mol. mass
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Solution

The correct option is D 1/5 of its mol. mass
2BrO3+12H++10eBr2+6H2O
During the above conversion bromate changed the oxidation number from +5 to 0 when its converted to Br2.
So the equivalent weight is M/5
So the equivalent mass of sodium bromate is 1/5 of itsmolecular weight.
Hence option D is correct.

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