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Previous year question hub

Atomic Structure - Physical Chemistry - Chemistry Previous Year Questions

Practice Atomic Structure - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

10Papers
10Years
23Questions
1Topics

Atomic Structure question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Atomic Structure. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 23 100%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 23 100%

Subject weightage

Top subjects by unique question coverage.

Chemistry
23 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
23 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Atomic Structure
23 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

VITEEE 2025
2 Qs
WB JEE 2024
2 Qs
WB JEE 2023
2 Qs
WB JEE 2022
4 Qs
WB JEE 2021
1 Qs
WB JEE 2020
4 Qs
WB JEE 2019
1 Qs
WB JEE 2018
2 Qs
WB JEE 2017
3 Qs
WB JEE 2016
2 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
VITEEE 202520252View paper
WB JEE 202420242View paper
WB JEE 202320232View paper
WB JEE 202220224View paper
WB JEE 202120211View paper
WB JEE 202020204View paper
WB JEE 201920191View paper
WB JEE 201820182View paper
WB JEE 201720173View paper
WB JEE 201620162View paper

All Atomic Structure previous year questions

Practice every matching question in batches of 20, with every available option.

1
2016 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2016
The time taken for an electron to complete one revolution in Bohr orbit of hydrogen atom is
A
\({{4{m^2}\pi {r^2}} \over {{n^2}{h^2}}}\)
B
\({{{n^2}{h^2}} \over {4m{r^2}}}\)
C
\({{4{\pi ^2}m{r^2}} \over {nh}}\)
D
\({{nh} \over {4{\pi ^2}m{r^2}}}\)
Open complete paper
2
2016 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2016
The energy required to break one mole of hydrogen-hydrogen bonds in H2 is 436 kJ. What is the longest wavelength of light required to break a single hydrogen-hydrogen bond?
A
68.5 nm
B
137 nm
C
274 nm
D
548 nm
Open complete paper
3
2017 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2017
If the given four electronic configurations.

(i) n = 4, l = 1

(ii) n = 4, l = 0

(iii) n = 3, l = 2

(iv) n = 3, l = 1

are arranged in order of increasing energy, then the order will be
A
(iv) < (ii) < (iii) < (i)
B
(ii) < (iv) < (i) < (iii)
C
(i) < (iii) < (ii) < (iv)
D
(iii) < (i) < (iv) < (ii)
Open complete paper
4
2017 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2017
Which of the following sets of quantum numbers represents the 19th electron of Cr(Z = 24) ?
A
\(\left( {4,1, - 1, + {1 \over 2}} \right)\)
B
\(\left( {4,0,0, + {1 \over 2}} \right)\)
C
\(\left( {3,2,0, - {1 \over 2}} \right)\)
D
\(\left( {3,2, - 2, + {1 \over 2}} \right)\)
Open complete paper
5
2017 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2017
Which one of the following corresponds to a photon of highest energy?
A
\(\lambda\) = 300 mm
B
v = 3 \(\times\) 108 s\(-\)1
C
\(\overline v\) = 30 cm\(-\)1
D
\(\varepsilon\) = 6.626 \(\times\) 10\(-\)27 J
Open complete paper
6
2018 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2018
The number of unpaired electrons in Ni (atomic number = 28) are
A
0
B
2
C
4
D
8
Open complete paper
7
2018 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2018
Which of the following electronic configuration is not possible?
A
n = 3, l = 0, m = 0
B
n = 3, l = 1, m = \(-\)1
C
n = 2, l = 0, m = \(-\)1
D
n = 2, l = 1, m = 0
Open complete paper
8
2019 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2019
Which one of the following electronic arrangements is absurd?
A
n = 3, l =1, m = \(-\)1
B
n = 3, l = 0, m = 0
C
n = 2, l = 0, m = \(-\)1
D
n = 2, l = 1, m = 0
Open complete paper
9
2020 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2020
The maximum number of electrons in an atom in which the last electron filled has the quantum numbers n = 3, l = 2 and m = \(-\) 1 is
A
17
B
27
C
28
D
30
Open complete paper
10
2020 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2020
The number of unpaired electrons in the uranium (92U) atom is
A
4
B
6
C
3
D
1
Open complete paper
11
2020 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2020
The difference between orbital angular momentum of an electron in a 4f -orbital and another electron in a 4s-orbital is
A
\(2\sqrt 3\)
B
\(3\sqrt 2\)
C
\(\sqrt 3\)
D
2
Open complete paper
12
2020 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2020
The radius of the first Bohr orbit of a hydrogen atom is 0.53 \(\times {10^-8}\) cm. The velocity of the electron in the first Bohr orbit is
A
\(2.188 \times {10^8}\) cm s-1
B
\(4.376 \times {10^8}\) cm s-1
C
\(1.094 \times {10^8}\) cm s-1
D
\(2.188 \times {10^9}\) cm s-1
Open complete paper
13
2021 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2021
The atomic masses of helium and neon are 4.0 and 20.0 amu respectively. The value of the de-Broglie wavelength of helium gas at \(-\)73\(^\circ\)C is M times the de-Broglie wavelength of neon at 727\(^\circ\)C. The value of M is
A
5
B
25
C
\({1 \over {5}}\)
D
\({1 \over {25}}\)
Open complete paper
14
2022 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2022

The de-Broglie wavelength (\(\lambda\)) for electron (e), proton (p) and He2+ ion (\(\alpha\)) are in the following order. Speed of e, p and \(\alpha\) are the same

A
\(\alpha\) > p > e
B
e > p > \(\alpha\)
C
e > \(\alpha\) > p
D
\(\alpha\) < p > e
Open complete paper
15
2022 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2022

Which one of the following is the correct set of four quantum numbers (n, 1, m, s) ?

A
\(\left( {3,0, - 1, + {1 \over 2}} \right)\)
B
\(\left( {4,3, - 2, - {1 \over 2}} \right)\)
C
\(\left( {3,1, - 2, - {1 \over 2}} \right)\)
D
\(\left( {4,2, - 3, + {1 \over 2}} \right)\)
Open complete paper
16
2022 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2022

In Bohr model of atom, radius of hydrogen atom in ground state is r1 and radius of He+ ion in ground state is r2. Which of the following is correct?

A
\({{{r_1}} \over {{r_2}}} = 4\)
B
\({{{r_1}} \over {{r_2}}} = {1 \over 2}\)
C
\({{{r_1}} \over {{r_2}}} = {1 \over 4}\)
D
\({{{r_2}} \over {{r_1}}} = {1 \over 2}\)
Open complete paper
17
2022 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2022

The number of unpaired electron in Mn2+ ion is

A
2
B
3
C
5
D
6
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18
2023 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2023

An electron in the 5d orbital can be represented by the following (n, l, m) values

A
(5, 2, 1)
B
(5, 1, \(-\)1)
C
(5, 0, 1)
D
(5, 2, \(-\)1)
Open complete paper
19
2023 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2023

Two base balls (masses : m\(_1\) = 100 g, and m\(_2\) = 50 g) are thrown. Both of them move with uniform velocity, but the velocity of m\(_2\) is 1.5 times that of m\(_1\). The ratio of de Broglie wavelengths \(\lambda\)(m\(_1\)) : \(\lambda\)(m\(_2\)) is given by

A
4 : 3
B
3 : 4
C
2 : 1
D
1 : 2
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20
2024 · Chemistry · Physical Chemistry · Atomic Structure
WB JEE 2024

Consider an electron moving in the first Bohr orbit of a \(\mathrm{He}^{+}\) ion with a velocity \(v_1\). If it is allowed to move in the third Bohr orbit with a velocity \(v_3\), then indicate the correct \(v_3: v_1\) ratio.

A
3 : 1
B
2 : 1
C
1 : 3
D
1 : 2
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Showing 20 of 23 questions