Structure of Atom Class 11 NCERT Notes

Updated for 2026 Boards • JEE • NEET

Structure of Atom Class 11 MCQs (NCERT Chapter 2) – JEE & NEET Practice

These MCQs test every key idea of modern atomic theory, from classical experiments to quantum mechanical concepts. They help you apply formulas, interpret data, and avoid common traps used in competitive exams.

Last Updated: February 2026 | Practice Set – Instant Feedback

Chapter-wise MCQ set with past-exam patterns, assertion–reason, numerical-based questions, and concept boosters aligned with NCERT.

Academia Aeternum Editorial Team

Reviewed by Subject Experts • Updated Feb 2026

Why Structure of Atom MCQs Matter for JEE & NEET

MCQs from this chapter frequently check ideas like quantum numbers, electronic configuration, and spectral lines in a time-bound format. Regular practice improves speed, accuracy, and your grip on conceptual traps.

Exam Trend Analysis • Updated 2026

How Structure of Atom MCQs Appear in JEE & NEET 2026

Recent papers emphasise multi‑concept MCQs linking Bohr’s model, de Broglie relation, and quantum numbers in a single question. Many items are NCERT‑based but framed with tricky options and calculation‑heavy data.

🎯 Knowledge Check

Chemistry — Structure Of Atom

50 Questions Class 11 MCQs
1
The smallest particle of an element that retains its chemical properties is called
(Board – Easy)
2
Which particle carries a negative charge?
(Board – Easy)
3
The mass of an electron is approximately
(Board – Easy)
4
The charge to mass ratio of electron is nearly
(Board – Easy)
5
Canal rays consist mainly of
(Board – Easy)
6
Which subatomic particle has no charge?
(Board – Easy)
7
The nucleus of atom contains
(Board – Easy)
8
Atomic number represents
(Board – Easy)
9
Mass number equals
(Board – Easy)
10
Isotopes differ in
(Board – Easy)
11
Maximum electrons in shell n is
(Board – Moderate)
12
Which quantum number defines orbital shape?
(Board – Moderate)
13
For n = 3, maximum number of orbitals is
(Board – Moderate)
14
Number of orbitals in p-subshell is
(Board – Moderate)
15
Which subshell has spherical shape?
(Board – Moderate)
16
Spin quantum number can be
(Board – Moderate)
17
Degenerate orbitals are those having
(Board – Moderate)
18
Which transition gives Lyman series?
(Board – Moderate)
19
Radius of hydrogen atom in ground state is
(Board – Moderate)
20
Energy of electron in first orbit of hydrogen is
(Board – Moderate)
21
Heisenberg uncertainty principle relates
(Advanced)
22
de Broglie wavelength is given by
(Advanced)
23
Number of nodes in 3p orbital is
(Advanced)
24
Radial nodes in 3p orbital
(Advanced)
25
Angular nodes in d-orbital
(Advanced)
26
Total number of orbitals in fourth shell is
(Advanced)
27
Which set of quantum numbers is NOT permissible?
(Advanced)
28
Number of electrons with n=3 is
(Advanced)
29
Which orbital has highest penetrating power?
(Advanced)
30
The spectral lines of hydrogen arise due to
(Advanced)
31
Which series lies in visible region?
(Advanced)
32
If velocity of electron doubles, its de Broglie wavelength becomes
(Advanced)
33
Which statement is correct for Aufbau principle?
(Advanced)
34
Pauli exclusion principle states
(Advanced)
35
Hund’s rule relates to
(Advanced)
36
Number of nodal planes in p-orbital is
(Advanced)
37
Which orbital has two angular nodes?
(Advanced)
38
The probability of finding electron is zero at nodes because
(Advanced)
39
Which quantum number decides orbital orientation?
(Advanced)
40
Value of l for f-subshell is
(Advanced)
41
Total angular nodes in 4f orbital
(Advanced)
42
Which particle shows dual nature?
(Advanced)
43
Energy of electron in nth orbit varies as
(JEE Level)
44
Radius of nth orbit varies as
(JEE Level)
45
Number of radial nodes in 4d orbital
(JEE Level)
46
Which has shortest wavelength?
(JEE Level)
47
If uncertainty in position decreases, momentum uncertainty
(JEE Level)
48
Which orbital has maximum energy in same shell?
(JEE Level)
49
Which rule explains half-filled stability?
(JEE Level)
50
Minimum uncertainty corresponds to
(Olympiad Level)
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These multiple-choice questions are carefully designed to strengthen conceptual clarity and analytical thinking in the chapter Structure of Atom. Beginning with fundamental ideas such as subatomic particles, atomic models, and basic quantum concepts, the set gradually progresses to advanced topics including quantum numbers, electronic configuration, spectral series, wave–particle duality, and uncertainty principle. Each question is accompanied by concise explanations to help learners understand…
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