The valency factor of `I_(2)` when, (i) it is formed by the reaction of potassium iodide and potassium iodate in acid medium and (ii) when it reacts with hypo, are respectively:A. (a)`2, 2`B. (b)`5/3, 2`C. (c )`3/5, 2`D. (d)`5, 2`

The valency factor of `I_(2)` when, (i) it is formed by the reaction o

1.	The valency factor of `I_(2)` when, (i) it is formed by the reaction of potassium iodide and potassium iodate in acid medium and (ii) when it reacts with hypo, are respectively:A. (a)`2, 2`B. (b)`5/3, 2`C. (c )`3/5, 2`D. (d)`5, 2`
Answer» Correct Answer - B `IO_(3)^(-)+I^(-)+H^(+) rarr I_(2)+H_(2)O` `I_(2)` can be said to have undergone disproportionation. :. V.f. of `I_(2)` for oxidation, `n_(1)=2(5-0)=10` and v.f. of `I_(2)` for reduction, `n_(2)=2(0-(-1))=2` `:. V.f. of I_(2) (overall) (n_(1)n_(2))/(n_(1)+N_(2))=(10xx2)/(10+2)=5/3` (ii) `I_(2)+2Na_(2)S_(2)O_(3) rarr Na_(a)S_(4)O_(6)+2Nal` `I_(2)+2e^(-) rarr 2I^(-) implies v.f.=2`

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The valency factor of `I_(2)` when, (i) it is formed by the reaction of potassium iodide and potassium iodate in acid medium and (ii) when it reacts with hypo, are respectively:A. (a)`2, 2`B. (b)`5/3, 2`C. (c )`3/5, 2`D. (d)`5, 2`

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