MCQ
Given below are two statements

Statement $I :$ The $E ^{\circ}$ value of $Ce ^{4+} / Ce ^{3+}$ is $+1.74 \,V$

Statement $II :$ $Ce$ is more stable in $Ce ^{4+}$ state than $Ce ^{3+}$ state.

In the light of the above statements, choose the most appropriate answer from the options given below

  • A
    Both statement $I$ and statement $II$ are correct
  • B
    Statement $I$ is incorrect but statement $II$ is correct
  • C
    Both statement $I$ and statement $II$ are incorrect
  • Statement $I$ is correct but statement $II$ is incorrect

Answer

Correct option: D.
Statement $I$ is correct but statement $II$ is incorrect
d
The $E ^{\circ}$ value for $Ce ^{4+} / Ce ^{3+}$ is $+1.74 V$ because the most stable oxidation state of lanthanide series elements is $+3$ .

It means $Ce ^{3+}$ is more stable than $Ce ^{4+}$

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