Inner Transition Element : Lanthanoids(Electronic Configuration, Oxidation States, and Lanthanoid Contraction) NEET Questions

Inorganic Chemistry - D- and F-Block Elements

Inner Transition Element : Lanthanoids(Electronic Configuration, Oxidation States, and Lanthanoid Contraction) MCQ Questions


13.
Which of the following ions does NOT have 4f electrons?
A.
Ce³⁺
B.
La³⁺
C.
Pr³⁺
D.
Nd³⁺
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ANSWER :
B. La³⁺
14.
The electronic configuration of Tb³⁺ (Z = 65) is:
A.
[Xe] 4f⁸
B.
[Xe] 4f⁷
C.
[Xe] 4f⁹
D.
[Xe] 4f⁶
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ANSWER :
A. [Xe] 4f⁸
15.
Which lanthanoid ion has 4f⁰ configuration?
A.
Eu²⁺
B.
Yb²⁺
C.
Gd³⁺
D.
Ce⁴⁺
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ANSWER :
D. Ce⁴⁺
16.
Which lanthanoid has only one stable oxidation state of +3?
A.
Cerium
B.
Ytterbium
C.
Gadolinium
D.
Europium
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ANSWER :
C. Gadolinium
17.
The configuration of Yb²⁺ is:
A.
[Xe] 4f¹⁴
B.
[Xe] 4f¹² 6s²
C.
[Xe] 4f¹³ 6s¹
D.
[Xe] 4f¹³
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ANSWER :
A. [Xe] 4f¹⁴
18.
How many lanthanoids have one electron in 5d orbital in their ground state?
A.
3
B.
2
C.
4
D.
5
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ANSWER :
C. 4