JEE Main 2022 — D And F Block Elements Question with Solution
From: JEE Main 2022 (Online) 27th June Evening Shift
Question
The 'f' orbitals are half and completely filled, respectively in lanthanide ions :
[Given : Atomic no. Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70; Dy, 66]
Choose an option
Show full solutionCorrect option: C
Correct answer
CTb4+ and Yb2+
Step-by-step explanation
Tb 4f9 6s2
Tb+4 4f7
Yb 4f14 6s2
Yb+2 4f14
Hence, the pair Tb+4 and Yb+2 have half filled and completely filled f subshells respectively.
Tb+4 4f7
Yb 4f14 6s2
Yb+2 4f14
Hence, the pair Tb+4 and Yb+2 have half filled and completely filled f subshells respectively.
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This is a previous-year question from JEE Main 2022, covering the D And F Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.