High Weightage Chapters for IAT (IISER)

These chapters are ranked by PYQ frequency from 360 IAT (IISER) questions. Use this as a data-backed priority list, then open any chapter to practice its previous-year questions.

360 PYQs analyzed110 chapters/topics4 subjects

Important questions Full weightage analysis Most repeated questions Create test

Must-practice core

23.3%

Top 10 chapters by PYQ frequency. Start here when revision time is limited.

Rising signal

4

Chapters with positive recent trend data in the catalog.

Subjects covered

4

Use subject buckets below to balance your high-weightage practice.

High Weightage Map

Biology

Principles of Inheritance and Variation

12 PYQs13.33%

Mathematics

Definite Integration

10 PYQs6.67%

Chemistry

Chemical Bonding and Molecular Structure

9 PYQs13.33%

Physics

Electrostatics

9 PYQs13.33%

Physics

Heat and Thermodynamics

9 PYQs13.33%

Chemistry

Coordination Compounds

8 PYQs13.33%

Mathematics

Application of Derivatives

7 PYQs0%

Mathematics

Matrices and Determinants

7 PYQs6.67%

Biology

Molecular Basis of Inheritance

7 PYQs13.33%

Chemistry

Atomic Structure

6 PYQs6.67%

Recently Rising Chapters

Heat and Thermodynamics

Dual Nature of Radiation

#4 / Mathematics

Limits, Continuity and Differentiability

Top High Weightage Chapters

Priority Rank With Share

#1 Principles of Inheritance and Variation12 PYQs13.33%Stable

#2 Definite Integration10 PYQs6.67%Stable

#3 Chemical Bonding and Molecular Structure9 PYQs13.33%Stable

#4 Electrostatics9 PYQs13.33%+99.9% rising

#5 Heat and Thermodynamics9 PYQs13.33%+99.9% rising

#6 Coordination Compounds8 PYQs13.33%Stable

#7 Application of Derivatives7 PYQs0%Stable

#8 Matrices and Determinants7 PYQs6.67%-50% falling

#9 Molecular Basis of Inheritance7 PYQs13.33%Stable

#10 Atomic Structure6 PYQs6.67%Stable

#11 Atoms and Nuclei6 PYQs6.67%Stable

#12 Biotechnology: Principles and Processes6 PYQs6.67%Stable

#13 Dual Nature of Radiation6 PYQs13.33%+99.9% rising

#14 Limits, Continuity and Differentiability6 PYQs13.33%+99.9% rising

#15 Probability6 PYQs6.67%Stable

Principles of Inheritance and Variation

#2 / Mathematics

Definite Integration

Chemical Bonding and Molecular Structure

Heat and Thermodynamics

Coordination Compounds

#7 / Mathematics

Application of Derivatives

#8 / Mathematics

Matrices and Determinants

Molecular Basis of Inheritance

#10 / Chemistry

Atomic Structure

Atoms and Nuclei

Biotechnology: Principles and Processes

Dual Nature of Radiation

#14 / Mathematics

Limits, Continuity and Differentiability

#15 / Mathematics

Simple Harmonic Motion

#18 / Mathematics

Complex Numbers

#19 / Mathematics

Differential Equations

#20 / Mathematics

#21 / Chemistry

General Organic Chemistry

#22 / Chemistry

Haloalkanes and Haloarenes

Human Health and Diseases

#24 / Chemistry

Cell Cycle and Cell Division

#28 / Chemistry

Chemical Kinetics

#29 / Chemistry

Compounds Containing Nitrogen

Current Electricity

#31 / Chemistry

Electrochemistry

Electromagnetic Induction

#33 / Chemistry

#34 / Chemistry

Liquid Solution

Locomotion and Movement

Photosynthesis in Higher Plants

Rotational Motion

#38 / Mathematics

Sequences and Series

#39 / Mathematics

Sets and Relations

#40 / Chemistry

Subject-wise High Weightage Chapters

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)

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)

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)

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)