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20. In the following reaction +IO 3(aq) 4H2O) 2Cr(aq) Cr2Oag +Iag) +8H (aq) is reduced. 7(aq) (A) the oxidation state of Cr d
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Answer #1

Cr in Cr2O7-2 has oxidation state of +6

Cr in Cr+3 has oxidation state of +3

So, Cr in Cr2O7-2 is reduced to Cr+3

I in I- has oxidation state of -1

I in IO3- has oxidation state of +5

So, I in I- is oxidised to IO3-

Answer: A

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20. In the following reaction +IO 3(aq) 4H2O) 2Cr(aq) Cr2Oag +Iag) +8H (aq) is reduced. 7(aq)...
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