Given below are two statements :
Statement I : The E° value of Ce⁴⁺/Ce³⁺ is + 1.74 V.
Statement II : Ce is more stable in Ce⁴⁺ state than Ce³⁺ state.
In the light of the above statements, choose the most appropriate answer from the options given below :

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Both statement I and statement II are incorrect

Statement I is correct but statement II is incorrect

Statement I is incorrect but statement II is correct

Both statement I and statement II are correct

answer is D.

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Detailed Solution

The E° value for Ce⁴⁺/Ce³⁺ is +1.74 V because the most stable oxidation state of lanthanide series elements is +3.
It means Ce³⁺is more stable than Ce⁴⁺
.

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