NEET 2026 Chemistry Oxidation States MCQ Question
Although +3 oxidation state is most common in lanthanoids, cerium still shows +4 oxidation state because:
After losing one more electron, it acquires 4f¹⁴ electronic configuration.
Its nearest inert gas is Radon.
Its atomic number is 61.
After losing one more electron, it acquires 4f⁰ electronic configuration.
Correct Answer
Detailed Explanation
Although +3 oxidation state is most common in lanthanoids, cerium still shows +4 oxidation state because after losing one more electron it acquires 4f⁰ electronic configuration.
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