TS EAMCET · Chemistry · d and f Block Elements
If stoichiometric quantities of \(\mathrm{KMnO}_4\) and \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) mixture is added for the oxidation of \(\mathrm{Fe}^{2+}\) to \(\mathrm{Fe}^{3+}\) in acidic medium, then \(\mathrm{Fe}^{2+}\) will be oxidised
- A equally by \(\mathrm{KMnO}_4\) and \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
- B more by \(\mathrm{KMnO}_4\)
- C more by \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
- D no reaction
Answer & Solution
Correct Answer
(B) more by \(\mathrm{KMnO}_4\)
Step-by-step Solution
Detailed explanation
\(\mathrm{KMnO}_4+\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) In this process \(\mathrm{KMnO}_4\) is strong oxidising agent in acidic medium. It oxidises \(\mathrm{Fe}^{2+}\) to \(\mathrm{Fe}^{3+} . \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) is weak oxidising agent in acidic medium.
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