Which of the following sets includes all the | vedclass

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(A) $K_2Cr_2O_7$ acts as a strong oxidizing agent in an acidic medium. It reacts with reducing agents by oxidizing them,while the dichromate ion $(Cr_

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$Fe^{2+}, Sn^{2+}, I^-, S^{2-}$

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(A) $K_2Cr_2O_7$ acts as a strong oxidizing agent in an acidic medium. It reacts with reducing agents by oxidizing them,while the dichromate ion $(Cr_2O_7^{2-})$ is reduced to the green-colored chromium$(III)$ ion $(Cr^{3+})$. Among the given species,$Fe^{2+}$,$Sn^{2+}$,$I^-$,and $S^{2-}$ are all reducing agents. Therefore,they will reduce $K_2Cr_2O_7$ and change its orange color to green. Thus,the correct set is $Fe^{2+}, Sn^{2+}, I^-, S^{2-}$.

Which of the following sets includes all the species that will change the orange colour of $K_2Cr_2O_7$ in acidic medium?

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