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JEE Main Chemistry question

ChemistryElectrochemistryJEE Main

Using the following data, calculate (in kJ) for the reaction 5\mathrm{Ce^{4+}}(aq)+\mathrm{Mn^{2+}}(aq)+4H_2O(l)\rightarrow5\mathrm{Ce^{3+}}(aq)+MnO_4^-(aq)+8H^+(aq)

MnO_4^-(aq)+8H^+(aq)+5e^-\rightarrow\mathrm{Mn^{2+}}(aq)+4H_2O(l), V

\mathrm{Ce^{4+}}(aq)+e^-\rightarrow\mathrm{Ce^{3+}}(aq), V

Answer: (B)

Solution

Here is reduced (cathode, right-hand side) and is oxidized to (anode, left-hand side).

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Question ID VK-143737