IAT (IISER) Important Questions
These important questions are organized from 360 previous-year questions. Start with high-frequency chapters and repeated topic patterns, then open any topic to practice the actual PYQs.
360 PYQs analyzed110 topic priorities4 subjects
360
PYQs Analyzed
Used to rank important practice areas.
360
Recent PYQs
2022-2026 question coverage.
60
Priority Topics
Direct links into focused PYQ sets.
4
Subjects
Subject-wise important areas below.
Top Important Questions by Chapter and Topic
Priority #1 / Biology
Principles of Inheritance and Variation
3.3% of analyzed PYQs
Priority #2 / Mathematics
Definite Integration
2.8% of analyzed PYQs
Priority #3 / Chemistry
Chemical Bonding and Molecular Structure
2.5% of analyzed PYQs
Priority #4 / Physics
Electrostatics
2.5% of analyzed PYQs
Priority #5 / Physics
Heat and Thermodynamics
2.5% of analyzed PYQs
Priority #6 / Chemistry
Coordination Compounds
2.2% of analyzed PYQs
Priority #7 / Mathematics
Application of Derivatives
1.9% of analyzed PYQs
Priority #8 / Mathematics
Matrices and Determinants
1.9% of analyzed PYQs
Priority #9 / Biology
Molecular Basis of Inheritance
1.9% of analyzed PYQs
Priority #10 / Chemistry
Atomic Structure
1.7% of analyzed PYQs
Priority #11 / Physics
Atoms and Nuclei
1.7% of analyzed PYQs
Priority #12 / Biology
Biotechnology: Principles and Processes
1.7% of analyzed PYQs
Priority #13 / Physics
Dual Nature of Radiation
1.7% of analyzed PYQs
Priority #14 / Mathematics
Limits, Continuity and Differentiability
1.7% of analyzed PYQs
Priority #15 / Mathematics
Probability
1.7% of analyzed PYQs
Priority #16 / Physics
Ray Optics
1.7% of analyzed PYQs
Priority #17 / Physics
Simple Harmonic Motion
1.7% of analyzed PYQs
Priority #18 / Mathematics
Complex Numbers
1.4% of analyzed PYQs
Priority #19 / Mathematics
Differential Equations
1.4% of analyzed PYQs
Priority #20 / Mathematics
Functions
1.4% of analyzed PYQs
Priority #21 / Chemistry
General Organic Chemistry
1.4% of analyzed PYQs
Priority #22 / Chemistry
Haloalkanes and Haloarenes
1.4% of analyzed PYQs
Priority #23 / Biology
Human Health and Diseases
1.4% of analyzed PYQs
Priority #24 / Chemistry
Isomerism
1.4% of analyzed PYQs
Priority #25 / Biology
Animal Kingdom
1.1% of analyzed PYQs
Priority #26 / Biology
Biomolecules
1.1% of analyzed PYQs
Priority #27 / Biology
Cell Cycle and Cell Division
1.1% of analyzed PYQs
Priority #28 / Chemistry
Chemical Kinetics
1.1% of analyzed PYQs
Priority #29 / Chemistry
Compounds Containing Nitrogen
1.1% of analyzed PYQs
Priority #30 / Physics
Current Electricity
1.1% of analyzed PYQs
Priority #31 / Chemistry
Electrochemistry
1.1% of analyzed PYQs
Priority #32 / Physics
Electromagnetic Induction
1.1% of analyzed PYQs
Priority #33 / Chemistry
Hydrocarbons
1.1% of analyzed PYQs
Priority #34 / Chemistry
Liquid Solution
1.1% of analyzed PYQs
Priority #35 / Biology
Locomotion and Movement
1.1% of analyzed PYQs
Priority #36 / Biology
Photosynthesis in Higher Plants
1.1% of analyzed PYQs
Priority #37 / Physics
Rotational Motion
1.1% of analyzed PYQs
Priority #38 / Mathematics
Sequences and Series
1.1% of analyzed PYQs
Priority #39 / Mathematics
Sets and Relations
1.1% of analyzed PYQs
Priority #40 / Chemistry
Thermodynamics
1.1% of analyzed PYQs
Priority #41 / Physics
Units & Measurement and Dimensions
1.1% of analyzed PYQs
Priority #42 / Mathematics
Vector Algebra
1.1% of analyzed PYQs
Priority #43 / Physics
Waves
1.1% of analyzed PYQs
Priority #44 / Physics
Work, Energy and Power
1.1% of analyzed PYQs
Priority #45 / Biology
Anatomy of Flowering Plants
0.8% of analyzed PYQs
Priority #46 / Mathematics
Binomial Theorem
0.8% of analyzed PYQs
Priority #47 / Physics
Capacitor
0.8% of analyzed PYQs
Priority #48 / Biology
Cell - The Unit of Life
0.8% of analyzed PYQs
Priority #49 / Mathematics
Circle
0.8% of analyzed PYQs
Priority #50 / Biology
Ecosystem
0.8% of analyzed PYQs
Priority #51 / Physics
Fluid Mechanics
0.8% of analyzed PYQs
Priority #52 / Physics
Gravitation
0.8% of analyzed PYQs
Priority #53 / Physics
Motion in a Straight Line
0.8% of analyzed PYQs
Priority #54 / Biology
Organisms and Populations
0.8% of analyzed PYQs
Priority #55 / Chemistry
p-Block Elements
0.8% of analyzed PYQs
Priority #56 / Chemistry
Periodic Table and Periodicity
0.8% of analyzed PYQs
Priority #57 / Mathematics
Permutations and Combinations
0.8% of analyzed PYQs
Priority #58 / Biology
Respiration in Plants
0.8% of analyzed PYQs
Priority #59 / Biology
Sexual Reproduction in Flowering Plants
0.8% of analyzed PYQs
Priority #60 / Chemistry
States of Matter
0.8% of analyzed PYQs
Subject-wise Important Questions
Biology
90 PYQs
#1 Principles of Inheritance and Variation(12)#2 Molecular Basis of Inheritance(7)#3 Biotechnology: Principles and Processes(6)#4 Human Health and Diseases(5)#5 Animal Kingdom(4)#6 Biomolecules(4)#7 Cell Cycle and Cell Division(4)#8 Locomotion and Movement(4)#9 Photosynthesis in Higher Plants(4)#10 Anatomy of Flowering Plants(3)#11 Cell - The Unit of Life(3)#12 Ecosystem(3)
Chemistry
90 PYQs
#1 Chemical Bonding and Molecular Structure(9)#2 Coordination Compounds(8)#3 Atomic Structure(6)#4 General Organic Chemistry(5)#5 Haloalkanes and Haloarenes(5)#6 Isomerism(5)#7 Chemical Kinetics(4)#8 Compounds Containing Nitrogen(4)#9 Electrochemistry(4)#10 Hydrocarbons(4)#11 Liquid Solution(4)#12 Thermodynamics(4)
Mathematics
90 PYQs
#1 Definite Integration(10)#2 Application of Derivatives(7)#3 Matrices and Determinants(7)#4 Limits, Continuity and Differentiability(6)#5 Probability(6)#6 Complex Numbers(5)#7 Differential Equations(5)#8 Functions(5)#9 Sequences and Series(4)#10 Sets and Relations(4)#11 Vector Algebra(4)#12 Binomial Theorem(3)
Physics
90 PYQs
#1 Electrostatics(9)#2 Heat and Thermodynamics(9)#3 Atoms and Nuclei(6)#4 Dual Nature of Radiation(6)#5 Ray Optics(6)#6 Simple Harmonic Motion(6)#7 Current Electricity(4)#8 Electromagnetic Induction(4)#9 Rotational Motion(4)#10 Units & Measurement and Dimensions(4)#11 Waves(4)#12 Work, Energy and Power(4)