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.
Which element among the lanthanoids shows +4 oxidation state most commonly?

NEET - 2020

A.
Ce
B.
Tb
C.
Dy
D.
Tm
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ANSWER :
A. Ce
2.
Which property decreases steadily across the lanthanoid series?
A.
Atomic number
B.
Atomic radius
C.
Density
D.
Oxidation number
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ANSWER :
B. Atomic radius
3.
The most common oxidation state of lanthanoids is:
A.
1
B.
2
C.
3
D.
4
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ANSWER :
C. 3
4.
Which of the following ions has the maximum number of unpaired electrons?
A.
Ce³⁺
B.
Gd³⁺
C.
Lu³⁺
D.
Yb³⁺
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ANSWER :
B. Gd³⁺
5.
What is the reason for the similarity in atomic radii of Zr and Hf?
A.
Actinoid contraction
B.
Lanthanoid contraction
C.
Poor shielding of d electrons
D.
Similar electronic configuration
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ANSWER :
B. Lanthanoid contraction
6.
The +2 oxidation state is most commonly exhibited by which of the following lanthanoids?
A.
Eu
B.
Ce
C.
Dy
D.
Tm
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ANSWER :
A. Eu