Q77 · CSIR-NET Chemistry, December 2019

Paper: CSIR-NET December 2019 · Subject: Inorganic Chemistry · Chapter: Lanthanides and Actinides · Topic: Lanthanides & Actinides – General · Marks: 2 · Difficulty: Easy

The pair in which both actinides show +3 oxidation state only is

(a)Ac and Lr

(b)Ac and No

(c)Cm and Bk

(d)Cm and Lr

Answer

Answer: A ✓ checked by 4AB · confidence high

Explanation

Ac (f⁰) and Lr (f¹⁴) are locked at +3. Cm and Bk also show +4, and No prefers +2 (f¹⁴).

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