JEE MAIN - Chemistry (2024 - 27th January Evening Shift - No. 14)
Given below are two statements :
Statement (I) : In the Lanthanoids, the formation $$\mathrm{Ce}^{+4}$$ is favoured by its noble gas configuration.
Statement (II) : $$\mathrm{Ce}^{+4}$$ is a strong oxidant reverting to the common +3 state.
In the light of the above statements, choose the most appropriate answer from the options given below :
Both Statement I and Statement II are false
Statement I is true but Statement II is false
Both Statement I and Statement II are true
Statement I is false but Statement II is true
Explanation
Statement (1) is true, $$\mathrm{Ce}^{+4}$$ has noble gas electronic configuration.
Statement (2) is also true due to high reduction potential for $$\mathrm{Ce}^{4+} / \mathrm{Ce}^{3+}(+1.74 \mathrm{~V})$$, and stability of $$\mathrm{Ce}^{3+}, \mathrm{Ce}^{4+}$$ acts as strong oxidizing agent.
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