Consider the following statements.
I. Eu2+ has f7 configuration and it is a strong reducing agent.
II. Yb2+ has f14 configuration and it is a reductant.
III. TbIV has half-filled f-orbitals and is an oxidant.
The correct statement(s) is/are (choose the

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Only II and III

I, II and III

Only I and II

Only I

answer is D.

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Detailed Solution

Eu [Xe]4f⁷6s².

Eu⁺² [Xe]4f⁷6s0. Therefore, Eu⁺²oxidizes readily to give more stable Eu⁺³ and acts as a strong reducing agent.

Yb [Xe]4f¹⁴6s².

Yb⁺² [Xe]4f¹⁴6s0. Therefore Yb⁺² oxidizes readily to give more stable Yb⁺³ and acts as a strong reducing agent.

Tb [Xe]4f⁹6s².

Tb (IV) [Xe]4f⁷6s⁰ Therefore Tb⁺⁴ reducees readily to give more stable Yb⁺³ and acts as a strong Oxidising agent.

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