IAT (IISER) Chapter Weightage
Analyze 360 IAT (IISER) PYQs by subject, chapter, category and year. Use this page to identify high-frequency chapters and jump into focused PYQ practice.
4 subjects110 chapters/topics360 PYQs
360
Total PYQs
IAT (IISER) question database
110
Topics Ranked
Chapter/topic landing pages
2026-2026
Year Range
Based on paper metadata
360
Last 10 Years
2017-2026
Dominant subject
Biology
25% of analyzed PYQs
Top 10 chapter share
23.3%
How concentrated the paper is around the highest-ranked chapters.
Fastest rising
Electrostatics
99.85% recent trend signal
Subject Share
360PYQs
Biology25%
Chemistry25%
Mathematics25%
Physics25%
Subject Trend by Year
biologychemistrymathematicsphysics
2026360 max PYQs/year2026
Top Chapter Groups
#1 Botany62
#2 Mechanics45
#3 Algebra44
#4 Calculus35
#5 Organic Chemistry31
#6 Physical Chemistry31
#7 Inorganic Chemistry28
#8 Zoology28
Chapter 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%
Physics
Atoms and Nuclei
6 PYQs6.67%
Biology
Biotechnology: Principles and Processes
6 PYQs6.67%
Physics
Dual Nature of Radiation
6 PYQs13.33%
Mathematics
Limits, Continuity and Differentiability
6 PYQs13.33%
Mathematics
Probability
6 PYQs6.67%
Physics
Ray Optics
6 PYQs6.67%
Subject-wise PYQ Hubs
Most Repeated Chapters
Chapter Share and Momentum
#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
#1 / Biology
Principles of Inheritance and Variation
#2 / Mathematics
Definite Integration
#3 / Chemistry
Chemical Bonding and Molecular Structure
#4 / Physics
Electrostatics
#5 / Physics
Heat and Thermodynamics
#6 / Chemistry
Coordination Compounds
#7 / Mathematics
Application of Derivatives
#8 / Mathematics
Matrices and Determinants
#9 / Biology
Molecular Basis of Inheritance
#10 / Chemistry
Atomic Structure
#11 / Physics
Atoms and Nuclei
#12 / Biology
Biotechnology: Principles and Processes
#13 / Physics
Dual Nature of Radiation
#14 / Mathematics
Limits, Continuity and Differentiability
#15 / Mathematics
Probability
#16 / Physics
Ray Optics
#17 / Physics
Simple Harmonic Motion
#18 / Mathematics
Complex Numbers
#19 / Mathematics
Differential Equations
#20 / Mathematics
Functions
#21 / Chemistry
General Organic Chemistry
#22 / Chemistry
Haloalkanes and Haloarenes
#23 / Biology
Human Health and Diseases
#24 / Chemistry
Isomerism
#25 / Biology
Animal Kingdom
#26 / Biology
Biomolecules
#27 / Biology
Cell Cycle and Cell Division
#28 / Chemistry
Chemical Kinetics
#29 / Chemistry
Compounds Containing Nitrogen
#30 / Physics
Current Electricity