Engineering
Chemistry
Dichromate and Permanganate Ion Reactions
Compounds of d Block Elements
Question
Consider the following list of reagents:
Acidified K2Cr2O7, alkaline KMnO4, CuSO4, H2O2, Cl2, O3, FeCl3, HNO3 and Na2S2O3. The total number of reagents that can oxidise aqueous iodide to iodine is
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Solution
K2Cr2O7 + H2SO4 + KI → K2SO4 + Cr2(SO4)3 + H2O + I2
KMnO4 + KOH + KI → KIO3 + K2MnO4 + H2O
H2O2 + KI → KOH + I2 + H2O
KI + Cl2 → KCl + I2
KI + O3 + H2O → KOH + I2
KI + HNO3 → KNO3 + H2O + I2 + [NO]
Na2S2O3 is acts as a reducing agent.