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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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

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Ce4++e→Ce3+
E∘=1.74 volt
As the Evalue 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+
 

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