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CGP EDU Academic Team
Published on: August 14, 2026
Why Sm 2+ , Eu 2+ and Yb 2+ ions in solutions are good reducing agents but an aqueous solution of Ce 4+ is a good oxidizing agent ?
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The most stable oxidation state of lanthanoides is +3. Hence, ions in +2 state tend to change to +3 state by loss of electron and those in +4 state tend to change to +3 state by gain of electron.
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