Q.
Statement I : The Eo value for Ce4+/Ce3+ is + 1.74V.
Statement II : Ce is more stable in Ce4+ state than Ce3+ state
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Want to Fund your own JEE / NEET / Foundation preparation ??
a
Both Statement I and statement II are incorrect
b
Statement I is incorrect but statement II is correct.
c
Statement I is correct but statement II is incorrect
d
Both statement I and statement II are correct
answer is C.
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Detailed Solution

Ce4++e−→Ce3+
E∘=1.74 volt
As the E∘ value here is positive, the reduction of Ce4+ to Ce3+ is feasible.
Though Ce4+ has a noble gas electronic configuration, but to remove 4 electrons from Ce we need to provide large amount of energy, thus Ce3+ is more stable than Ce4+

