JEE Main 2021 — D And F Block Elements Question with Solution
From: JEE Main 2021 (Online) 26th February Morning Shift
Question
Which one of the following lanthanoids does not form MO2? [M is lanthanoid metal]
Choose an option
Show full solutionCorrect option: C
Correct answer
CYb
Step-by-step explanation
Nd (60) = 4f4 6s2
Pr (59) = 4f3 6s2
Dy (66) = 4f10 6s2
Yb (70) = 4f14 6s2
Yb+2 has fully-filled 4f orbital, it will require very large amount of energy to reach +4 oxidation state.
Pr (59) = 4f3 6s2
Dy (66) = 4f10 6s2
Yb (70) = 4f14 6s2
Yb+2 has fully-filled 4f orbital, it will require very large amount of energy to reach +4 oxidation state.
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