chemistry : class11 d subshell : Concept of subshells : Structure of Atom MCQ Questions and Answers
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d subshell
MCQ questions and answers.
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MCQ Questions
1. What is the azimuthal quantum number associated with a d subshell?
A.
0
B.
1
C.
2
D.
3
Correct Answer:
2
Explanation:
A d subshell is characterized by the azimuthal quantum number l = 2.
2. How many orbitals are present in a d subshell?
A.
1
B.
3
C.
5
D.
7
Correct Answer:
5
Explanation:
The d subshell has five orbitals corresponding to five possible values of the magnetic quantum number.
3. What is the maximum number of electrons that can occupy a d subshell?
A.
2
B.
6
C.
10
D.
14
Correct Answer:
10
Explanation:
A d subshell contains five orbitals, and each orbital can hold two electrons, so it can contain a maximum of 10 electrons.
4. Which is the first principal energy level that contains a d subshell?
A.
First energy level
B.
Second energy level
C.
Third energy level
D.
Fourth energy level
Correct Answer:
Third energy level
Explanation:
A d subshell requires l = 2, and the principal quantum number must be greater than l. Therefore, the first d subshell is 3d.
5. Which of the following represents a d subshell?
A.
2s
B.
2p
C.
3d
D.
4f
Correct Answer:
3d
Explanation:
The notation 3d represents a d subshell in the third principal energy level.
6. What are the possible values of the magnetic quantum number for a d subshell?
A.
0 only
B.
-1, 0, +1
C.
-2, -1, 0, +1, +2
D.
-3, -2, -1, 0, +1, +2, +3
Correct Answer:
-2, -1, 0, +1, +2
Explanation:
For a d subshell, l = 2, so the magnetic quantum number can have values from -2 to +2, giving five values.
7. How many d orbitals are occupied when a d subshell is written as d5 according to Hund's rule?
A.
1
B.
2
C.
5
D.
10
Correct Answer:
5
Explanation:
A d5 configuration has five electrons, which occupy the five d orbitals singly before pairing begins.
8. Which subshell has five orbitals and can hold up to ten electrons?
A.
s subshell
B.
p subshell
C.
d subshell
D.
f subshell
Correct Answer:
d subshell
Explanation:
The d subshell contains five orbitals and has a maximum capacity of ten electrons.
9. What is the usual general shape of most d orbitals?
A.
Spherical
B.
Dumbbell-shaped
C.
Cloverleaf-shaped
D.
Circular ring-shaped
Correct Answer:
Cloverleaf-shaped
Explanation:
Most d orbitals have a four-lobed, cloverleaf-like shape, although the d z squared orbital has a different shape.
10. Which of the following is not a d subshell notation?
A.
3d
B.
4d
C.
5d
D.
2d
Correct Answer:
2d
Explanation:
A d subshell cannot exist when n = 2 because the azimuthal quantum number l = 2 must be less than the principal quantum number. The first possible d subshell is 3d.
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