Question

Given below are two statements:

Statement 1: The ${\mathrm{E}}^{\circ }$value for ${\mathrm{Ce}}^{4+}/{\mathrm{Ce}}^{3+}$ is ${}^{+}1.74\mathrm{V}.$

Statement 2: $\mathrm{Ce}$is more stable in ${\mathrm{Ce}}^{4+}$state than ${\mathrm{Ce}}^{3+}$state

• A. Both statement 1 and statement 2 are correct
• B. Statement 1 is incorrect but statement 2 is correct
• C. Both statement 1 and statement 2 are incorrect
• D. Statement 1 is correct but statement 2 is incorrect

Answer 1

The correct option is D

Statement 1 is correct but statement 2 is incorrect

Answer: (D)

Explanation for correct option:

${\mathrm{Ce}}^{4+}$is a good oxidising agent as ${\mathrm{Ce}}^{3+}$is more stable

$$\begin{gathered} {\mathrm{Ce}}^{4-}+{\mathrm{e}}^{-}\to {\mathrm{Ce}}^{3+} \\ \mathrm{E}°=1.74\mathrm{volt} \end{gathered}$$

Hence option (D) is the correct answer.