Electronic Configuration of Elements, Extra Stability of Half-Filled and Completely Filled Orbitals. NEET Questions

Physical Chemistry - Atomic Structure

Electronic Configuration of Elements, Extra Stability of Half-Filled and Completely Filled Orbitals. MCQ Questions


7.
Which of the following elements exhibits extra stability due to a half-filled d-orbital?
A.
Cr
B.
Fe
C.
Ni
D.
Zn
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ANSWER :
A. Cr
8.
Which of the following elements has a fully filled d-subshell?
A.
Zn
B.
Cr
C.
Cu
D.
Mn
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ANSWER :
A. Zn
9.
Which of the following electronic configurations is incorrect?
A.
[Ne] 3sĀ² 3pā¶ 3dāµ 4sĀ¹
B.
[Ne] 3sĀ² 3pā¶ 3dā¶ 4sĀ¹
C.
[Ne] 3sĀ² 3pā¶ 3dā· 4sĀ²
D.
[Ne] 3sĀ² 3pā¶ 3dāµ 4sĀ²
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ANSWER :
D. [Ne] 3sĀ² 3pā¶ 3dāµ 4sĀ²
10.
Why does Cr have an anomalous configuration?

NEET - 2018

A.
Extra stability of a half-filled d-orbital
B.
Energy conservation
C.
Shielding effect
D.
Exchange energy
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ANSWER :
A. Extra stability of a half-filled d-orbital
11.
Which of the following elements does not have a half-filled d-orbital?
A.
Mn
B.
Fe
C.
Cu
D.
Cr
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ANSWER :
C. Cu
12.
Which electronic configuration represents a stable noble gas?
A.
[He] 2sĀ² 2pā¶
B.
[Ne] 3sĀ² 3pā¶
C.
[Ar] 4sĀ² 3dĀ¹ā° 4pā¶
D.
All of these
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ANSWER :
D. All of these