Assertion : $C e^{4 +}$ is good analytical reagent. Reason: $C e^{4 +}$ has the tendency to change to $C e^{3 +}$ .

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The $E^{0}$ value for $C e^{4 +} / C e^{3 +}$ = $1.74$ $V$ , this value show that $C e^{+ 4}$ has sufficient kinetic stability due to which the reaction rate is very slow and hence is good analytical reagent. An analytical reagent is a chemical compound of a known high standard of purity.

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