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


1.
The general electronic configuration of lanthanoids is:
A.
[Xe] 5f¹⁻¹⁴ 6d⁰⁻¹ 7s²
B.
[Xe] 4f¹⁻¹⁴ 5d⁰⁻¹ 6s²
C.
[Xe] 4f¹⁻¹⁴ 5d¹⁻¹⁰ 6s²
D.
[Kr] 4f¹⁻¹⁴ 5d⁰⁻¹ 6s²
😑 View Answer Rough Work Error
ANSWER :
B. [Xe] 4f¹⁻¹⁴ 5d⁰⁻¹ 6s²
2.
The electronic configuration of Ce (Z = 58) is:
A.
[Xe] 4f⁰ 5d² 6s²
B.
[Xe] 4f³ 6s¹
C.
[Xe] 4f¹ 5d¹ 6s²
D.
[Xe] 4f² 6s²
😑 View Answer Rough Work Error
ANSWER :
C. [Xe] 4f¹ 5d¹ 6s²
3.
Which of the following lanthanoid ions has 4f⁷ configuration?
A.
Pr³⁺
B.
Eu²⁺
C.
Yb³⁺
D.
Ce³⁺
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ANSWER :
B. Eu²⁺
4.
The electronic configuration of Gd³⁺ (Z = 64) is:
A.
[Xe] 4f⁸
B.
[Xe] 4f⁶ 5d¹
C.
[Xe] 4f⁷ 5d¹
D.
[Xe] 4f⁷
😑 View Answer Rough Work Error
ANSWER :
D. [Xe] 4f⁷
5.
The atom of which lanthanoid has the configuration [Xe] 4f¹⁴ 5d¹ 6s²?
A.
Ytterbium
B.
Erbium
C.
Thulium
D.
Lutetium
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ANSWER :
D. Lutetium
6.
Which of the following Ln³⁺ ions has the maximum number of unpaired electrons?
A.
Ce³⁺
B.
Lu³⁺
C.
Eu³⁺
D.
Gd³⁺
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ANSWER :
D. Gd³⁺