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Question

In the reaction 2Na2S2O3+I2Na2S4O6+2NaI, the oxidation state of sulphur is :

A
decreased
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B
increased
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C
unchanged
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D
none of these
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Solution

The correct option is C increased
Given the reaction:
2Na2S2O3+I2Na2S4O6+2NaI
+2 +2.5
We can see that the oxidation state of S increases.

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