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Which of the following oxidation reactions are carried out by both K2Cr2O7 and KMnO4 in acidic medium ? A. I− → I2 B. S2− → S C. Fe2+ → Fe3+ D. I− → IO3− E. S2O3^2− → SO4^2− Choose the correct answer from the options given below :

1. B, C and D only
2. A, D and E only
3. A, B and C only
4. C, D and E only

Correct answer: B, C and D only

Solution

K2Cr2O7 and KMnO4 are strong oxidizing agents in acidic conditions, capable of oxidizing iodide ions to iodine, sulfide ions to sulfur, and ferrous ions to ferric ions. Additionally, they can oxidize iodide to iodate, making options B, C, and D correct.

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