Q55 · CSIR-NET Chemistry, December 2013

Paper: CSIR-NET December 2013 · Subject: Inorganic Chemistry · Chapter: Lanthanides and Actinides · Topic: Lanthanides & Actinides – General · Marks: 2 · Difficulty: Easy

The ground state forms of Sm and Eu respectively, are

(a)$^{7}\mathrm{F}_{0}$ and $^{6}\mathrm{H}_{5/2}$

(b)$^{6}\mathrm{H}_{5/2}$ and $^{7}\mathrm{F}_{0}$

(c)$^{2}\mathrm{F}_{5/2}$ and $^{5}\mathrm{I}_{4}$

(d)$^{7}\mathrm{F}_{6}$ and $^{2}\mathrm{F}_{7/2}$

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

Sm³⁺ (f⁵): ⁶H₅/₂; Eu³⁺ (f⁶): ⁷F₀.

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