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Previous year question hub

IAT IISER- Previous Year Papers Previous Year Questions

Practice IAT IISER- Previous Year Papers previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

5Papers
5Years
300Questions
13Topics

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Chemistry

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75 questions5 papers5 years

Physics

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75 questions5 papers5 years

Mathematics

Explore previous-paper coverage, trends and focused practice for Mathematics.

75 questions5 papers5 years

Biology

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Included previous year papers

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

PaperYear / sessionQuestions in this viewOpen
IAT IISER 2025202560View paper
IAT IISER 2024202460View paper
IAT IISER 2023202360View paper
IAT IISER 2022202260View paper
IAT IISER 2020202060View paper

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2020 · Chemistry · Inorganic Chemistry · P Block Elements
IAT IISER 2020
Which among the following is NOT correct?
A
$\mathrm{H}_3 \mathrm{PO}_4$ is a tribasic acid
B
$\mathrm{H}_3 \mathrm{PO}_3$ is a dibasic acid.
C
$\mathrm{H}_3 \mathrm{PO}_2$ is a monobasic acid.
D
$\mathrm{H}_3 \mathrm{PO}_2$ is a tribasic acid
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2
2022 · Physics · Mechanics · Circular Motion
IAT IISER 2022
A point mass $m$ attached to a massless string is undergoing circular motion in a vertical plane. The length of the string is $R$ and the acceleration due to gravity is $g$. If the minimum value of the tension in the string is 2 mg , the maximum speed of this circular motion of the point mass is
A
$\sqrt{6 g R}$
B
$\sqrt{7 g R}$
C
$\sqrt{(7 / 2) g R}$
D
$4 \sqrt{g R}$
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3
2023 · Physics · Mechanics · Motion In A Straight Line
IAT IISER 2023
A ball is thrown vertically upwards with an initial speed $u$ from a height $h$ above the ground. The ball eventually hits the ground with a speed $v$. The acceleration due to gravity is $g$ and air resistance is negligible. What is the average speed of the ball over its entire trajectory?
A
$\frac{g h}{2(u+v)}$
B
$\frac{u+v}{2}$
C
$\frac{u^2+v^2}{2(u+v)}$
D
$\frac{u^2+g h}{2(u+v)}$
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4
2024 · Physics · Mechanics · Rotational Motion
IAT IISER 2024
An inextensible cord of negligible mass passes over the rim of a solid disc of mass $M$ and radius $R$. The disc is free to rotate about an axis passing through the centre perpendicular to the plane of the screen, as shown in the figure. Two blocks of masses $M$ and $\widetilde{M} / 2$ are attached to the two free ends of the cord. Assume that there is no slipping of the cord on the disc. The acceleration due to gravity is $g$. What is the value of the angular acceleration of the disc? IAT (IISER) 2024 Physics - Rotational Motion Question 3 English
A
$g / R$
B
$g / 2 R$
C
$g / 3 R$
D
$g / 4 R$
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5
2025 · Physics · Mechanics · Waves
IAT IISER 2025

Consider two waves, which are given by $y_1(x, t)=A \sin (k x-\omega t)$ and $y_2(x, t)=\sqrt{3} A \cos (k x-\omega t)$, where $k$ is the wave number and $\omega$ is the angular frequency. The amplitude of the resultant waveform obtained by the superposition of the two waves is $A_s$ and its phase difference with $y_1$ is $\phi_s$. What are $A_s$ and $\phi_s$ ?

A

\(A_s=2 A \text { and } \phi_s=\frac{\pi}{3}\)

B

\(A_s=2 A \text { and } \phi_s=\frac{\pi}{6}\)

C

\(A_s=\frac{A}{2} \text { and } \phi_s=\frac{\pi}{3}\)

D

\(A_s=\frac{A}{2} \text { and } \phi_s=\frac{\pi}{6}\)

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6
2020 · Chemistry · Inorganic Chemistry · Coordination Compounds
IAT IISER 2020

\(\text { The number of unpaired electron(s) in the square planar complex }[\text{Ni}(\text{CN})_4]^{2-} \text { is/are }\) :

A
2
B
1
C
4
D
0
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