CUET PG PYQs for The Structure of an Atom with Solutions: Practice CUET PG Previous Year Questions

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The Structure of an Atom is an important topic in the Chemistry section in CUET PG exam. Practising this topic will increase your score overall and make your conceptual grip on CUET PG exam stronger.

This article gives you a full set of CUET PG PYQs for The Structure of an Atom with explanations for effective preparation. Practice of CUET PG Chemistry PYQs including The Structure of an Atom questions regularly will improve accuracy, speed, and confidence in the CUET PG 2026 exam.

CUET PG PYQs for The Structure of an Atom with Solutions

1.
Using Slater's rule, the shielding constant and effective nuclear charge for the outermost electron of Mg are respectively.
- 9.10 and 2.90
- 9.15 and 2.85
- 8.15 and 3.85
- 9.10 and 3.90
View Solution
2.
A state (n₁, n₂ ) for a particle in a rectangular box with sides of length L₁ = L and L₂ = 2L that is accidentally degenerate with the state (4, 4) is
- n₁=2; n₂ = 8
- n₁=8; n₂ = 2
- n₁=4; n₂ = 6
- n₁=2; n₂ = 2
View Solution
3.
Which among the following will not follow the Effective Atomic Number rule?
- \([Mn(CO)_5]^-\)
- \(Co_2 (CO)_8\)
- \(Rh_2(CO)_4 Cl_2\)
- \(Ni(PF_3)_4\)
View Solution
4.
To generate molecular orbitals in molecules consisting of three or more atoms, which of the following is correct
- Group orbitals are first generated by combining atomic orbitals with same symmetry
- Group orbitals are first generated by combining atomic orbitals with different symmetry.
- Group orbitals can be treated as molecular orbitals of the molecule.
- LCAO method can't be applied.
View Solution
5.
Consider the following pair of electrons :
1. \(n=3, l=1, m_l =1, m_s = + \frac{1}{2}\; and \;n = 3, l=2, m_l =1, m_s=+\frac{1}{2}\)
2. \(n=3,l=2,m_l=-2,m_s=-\frac{1}{2}\;and n=3,l=2,m_l=-1,m_s=-\frac{1}{2}\)
3. \(n=3,l=2,m_l=2,m_s=+\frac{1}{2}\;and \;n=4,l=2,m_l=2,m_s=+\frac{1}{2}\)
- Only 1
- Only 2
- Only 3
- Only 2 and 3
View Solution
6.
The experimental magnetic moment (3.4 BM) of a hydrated salt of \(Eu^{3+}\) at 300 K is significantly different from calculated value. The difference is due to (Given atomic number of \(E_u\) = 63)
- Population of electrons at higher J level(s) via thermal excitation
- Strong ligand field splitting of f-orbitals
- Large spin-orbit coupling constant
- Pairing of electrons in f-orbitals
View Solution
7.
The orbital angular momentum of an electron in 2S orbital is
- \(+\frac{1}{2}\frac{h}{2\pi}\)
- zero
- \(-\frac{1}{2}\frac{h}{2\pi}\)
- \(\frac{h}{2\pi}\)
View Solution

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CUET PG PYQs for The Structure of an Atom with Solutions

1.Using Slater's rule, the shielding constant and effective nuclear charge for the outermost electron of Mg are respectively.

2.A state (n1, n2 ) for a particle in a rectangular box with sides of length L1 = L and L2 = 2L that is accidentally degenerate with the state (4, 4) is

3.Which among the following will not follow the Effective Atomic Number rule?

4.To generate molecular orbitals in molecules consisting of three or more atoms, which of the following is correct

5.Consider the following pair of electrons :1. \(n=3, l=1, m_l =1, m_s = + \frac{1}{2}\; and \;n = 3, l=2, m_l =1, m_s=+\frac{1}{2}\)2. \(n=3,l=2,m_l=-2,m_s=-\frac{1}{2}\;and n=3,l=2,m_l=-1,m_s=-\frac{1}{2}\)3. \(n=3,l=2,m_l=2,m_s=+\frac{1}{2}\;and \;n=4,l=2,m_l=2,m_s=+\frac{1}{2}\)

6.The experimental magnetic moment (3.4 BM) of a hydrated salt of \(Eu^{3+}\) at 300 K is significantly different from calculated value. The difference is due to (Given atomic number of \(E_u\) = 63)

7.The orbital angular momentum of an electron in 2S orbital is

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1.
Using Slater's rule, the shielding constant and effective nuclear charge for the outermost electron of Mg are respectively.

2.
A state (n₁, n₂ ) for a particle in a rectangular box with sides of length L₁ = L and L₂ = 2L that is accidentally degenerate with the state (4, 4) is

3.
Which among the following will not follow the Effective Atomic Number rule?

4.
To generate molecular orbitals in molecules consisting of three or more atoms, which of the following is correct

5.
Consider the following pair of electrons :
1. \(n=3, l=1, m_l =1, m_s = + \frac{1}{2}\; and \;n = 3, l=2, m_l =1, m_s=+\frac{1}{2}\)
2. \(n=3,l=2,m_l=-2,m_s=-\frac{1}{2}\;and n=3,l=2,m_l=-1,m_s=-\frac{1}{2}\)
3. \(n=3,l=2,m_l=2,m_s=+\frac{1}{2}\;and \;n=4,l=2,m_l=2,m_s=+\frac{1}{2}\)

6.
The experimental magnetic moment (3.4 BM) of a hydrated salt of \(Eu^{3+}\) at 300 K is significantly different from calculated value. The difference is due to (Given atomic number of \(E_u\) = 63)

7.
The orbital angular momentum of an electron in 2S orbital is