Which of the following oxidation reactions are carried out by both $$K_{2}Cr_{2}O_{7}$$ and $$KMnO_{4}$$ in acidic medium? $$A.\Gamma^{-}\rightarrow I_{2}B.S^{2-}\rightarrow S C.Fe^{2+}\rightarrow Fe^{3+}D.\Gamma^{-}\rightarrow IO_{3}^{-}E.S_{2}O_{3}^{2-}\rightarrow SO_{4}^{2-}$$ Choose the correct answer from the options given below:

We need to find which oxidation reactions are performed by both $$K_2Cr_2O_7$$ and $$KMnO_4$$ in acidic medium.

A. $$I^- \rightarrow I_2$$:

Both $$K_2Cr_2O_7$$ and $$KMnO_4$$ are strong enough oxidizing agents to oxidize iodide to iodine. YES for both.

B. $$S^{2-} \rightarrow S$$:

Both oxidizing agents can oxidize sulfide ions to elemental sulfur in acidic medium. YES for both.

C. $$Fe^{2+} \rightarrow Fe^{3+}$$:

Both $$K_2Cr_2O_7$$ and $$KMnO_4$$ readily oxidize ferrous ions to ferric ions in acidic medium. This is a standard titration reaction for both. YES for both.

D. $$I^- \rightarrow IO_3^-$$:

Oxidizing $$I^-$$ all the way to $$IO_3^-$$ requires a very strong oxidizing agent under specific conditions. Neither $$K_2Cr_2O_7$$ nor $$KMnO_4$$ in normal acidic conditions oxidizes $$I^-$$ beyond $$I_2$$ to $$IO_3^-$$. NO for both.

E. $$S_2O_3^{2-} \rightarrow SO_4^{2-}$$:

While $$KMnO_4$$ can oxidize thiosulfate to sulfate, $$K_2Cr_2O_7$$ typically does not oxidize thiosulfate cleanly to sulfate. Not reliably both.

The common reactions are A, B, and C. The answer is Option D) A, B and C Only.