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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.

5Papers
5Years
5Questions
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 5 100%

Question type distribution

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

Multiple Choices 5 100%

Subject weightage

Top subjects by unique question coverage.

Chemistry
5 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
5 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Atomic Structure
5 Qs

Paper coverage

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

IAT IISER 2025
1 Qs
IAT IISER 2024
1 Qs
IAT IISER 2023
1 Qs
IAT IISER 2022
1 Qs
IAT IISER 2020
1 Qs

Included previous year papers

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

PaperYear / sessionQuestions in this viewOpen
IAT IISER 202520251View paper
IAT IISER 202420241View paper
IAT IISER 202320231View paper
IAT IISER 202220221View paper
IAT IISER 202020201View paper

All Atomic Structure previous year questions

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

1
2020 · Chemistry · Physical Chemistry · Atomic Structure
IAT IISER 2020
The total number of nodes for a given principal quantum number $n$, and azimuthal quantum number $\ell$, are
A
sum of $\ell$ angular nodes and $n+\ell-1$ radial nodes
B
sum of $\ell$ angular nodes and $n-\ell-1$ radial nodes
C
sum of $\ell+1$ angular nodes and $n-\ell-1$ radial nodes
D
sum of $\ell+1$ angular nodes and $n+\ell-1$ radial nodes
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2
2022 · Chemistry · Physical Chemistry · Atomic Structure
IAT IISER 2022

Which of the following expressions represents the hydrogen atom wave function $\psi(r)$ shown in the figure below? ( $r$ is the distance of the electron from the nucleus and $a_0$ is a constant)

IAT (IISER) 2022 Chemistry - Atomic Structure Question 3 English
A
$\cdot \frac{1}{\sqrt{\pi}}\left(\frac{1}{a_0}\right)^{3 / 2} e^{-r / 2 a_0}$
B
$\frac{1}{\sqrt{6 \pi}}\left(\frac{1}{a_0}\right)^{3 / 2}\left(\frac{r}{a_0}\right) e^{-r / 2 a_0}$
C
$\frac{1}{4 \sqrt{2 \pi}}\left(\frac{1}{a_0}\right)^{3 / 2}\left(2-\frac{r}{a_0}\right) e^{-r / 2 a_0}$
D
$\frac{1}{\sqrt{3 \pi}}\left(\frac{1}{a_0}\right)^{3 / 2}\left(3-\frac{2 r}{a_0}+\frac{2 r^2}{9 a_0^2}\right) e^{-r / 3 a_0}$
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3
2023 · Chemistry · Physical Chemistry · Atomic Structure
IAT IISER 2023

$$\text { How many radial nodes does } \mathrm{Ca}^{+} \text {have in its } 4 \text { s orbital? }$$

A
0
B
1
C
2
D
3
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4
2024 · Chemistry · Physical Chemistry · Atomic Structure
IAT IISER 2024
The minimum energy needed to remove an electron from a metal corresponds to a wavelength of 500 nm . What is the total kinetic energy of all the photoelectrons ejected per second when the entire radiation from a 100 Watt bulb with a wavelength of 300 nm falls on the surface of the metal? [Planck's constant $=6.6 \times 10^{34} \mathrm{Js}$; speed of light $=3 \times 10^8 \mathrm{~ms}^{-1}$ ]
A
$1.6 \times 10^{-19} \mathrm{~J}$
B
$2.6 \times 10^{-19} \mathrm{~J}$
C
40 J
D
80 J
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5
2025 · Chemistry · Physical Chemistry · Atomic Structure
IAT IISER 2025

What is the time period of revolution of an electron in the fourth Bohr orbit of $\mathrm{He}^{+}$?

[Bohr radius $=52.9$ picometers, mass of an electron $=9.11 \times 10^{-31} \mathrm{~kg}$, Planck's constant $=6.626 \times 10^{-34} \mathrm{Js}$ ]

A

24 femtoseconds

B

4.8 femtoseconds

C

24 femtoseconds

D

2.4 femtoseconds

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