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Consider the following list of reagent ...

Consider the following list of reagent
`"Acidified" K_(2)Cr_(2)O_(7), "alkaline" KMnO_(4), CuSO_(4), H_(2)O_(2), Cl_(2) ,O_(3),FeCl_(3),HNO_(3) and Na_(2)S_(2)O_(3)`
The total number of reagents that can oxidise aqueous iodide iodine is

Text Solution

Verified by Experts

The correct Answer is:
7
Alkaline `KMnO_(4)` oxidises `I^(-) to IO_(3)^(-)`
`2KMnO_(4)+H_(2)O+KIrarr2MnO_(2)+2KOH+KIO_(3)`
`NaS_(2)O_(3)` being a reducing agent cannot oxidise `I^(-) to I^(2)`
All the remaining seven reagent can oxidise aqueous ion to iodine i.e
`O_(3)+2KI+H_(2)rarr2KOH_I_(2)+O_(2)`
`2FeCI_(3)+2KIrarr2FeCI_(2)+2KCI+I_(2)`
`4HNO_(3)+22KIrarr2FeCI_(2)+2KCI+I_(2)`
`4HNO_(32)+2KIrarr2KNO_(3)+2NO_(2)+I_(2)+2H_(2)O`
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Consider the following list of regents: Acidified K_(2)Cr_(2)O_(7) , alkaline KMnO_(4) , CuSO_(4) , H_(2)O_(2) , CI_(2) , O_(3) , HNO_(3) , and Na_(2)S_(2)O_(3) . The total number of reagents that can oxidis aqueous I^(Theta) ion I_(2) is

K_(2)Cr_(2)O_(7) overset(Delta) to K_(2)CrO_(4)+Cr_(2)O_(3)+O_(2)uarr