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Statement-1: ${Ce}^{4 +}$ is more stable than ${Ce}^{3 +}$ .
Statement-2: ${Ce}^{4 +}$ has noble gas configuration

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Statement-1 is true, Statement -2 is false.

Statement-1 is false, Statement -2 is true

Statement-1 is True, Statement-2 is True, Statement-2
is NOT a correct explanation for Statement-1

Statement-1 is True, Statement-2 is True; Statement-2
is a correct explanation for Statement-1

answer is D.

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Detailed Solution

${Ce}^{4 +}$ is more stable than ${Ce}^{3 +}$ .It is due to the fact that the +3 oxidation state is more stable than the +4 oxidation state.

The ${Ce}^{4 +}$ ion is favored by the noble gas configuration, Because its Eo value for ${Ce}^{4 +}$ / ${Ce}^{3 +}$ is positive.

$E^{\circ} (\frac{{Ce}^{4 +}}{{Ce}^{3 +}}) = + 1.74 V$

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