IISER Aptitude Test

IISER Aptitude Test (IAT) is an Indian computer-based test for admission to the various undergraduate programs offered by the seven IISERs, along with IISc Bangalore and IIT Madras.^[3][4][5][6]

IISER Aptitude Test – UG

Acronym	IAT
Type	Electronic assessment (CBT mode)
Administrator	IISER Joint Admission Committee (IISER-JAC Chairman)
Skills tested	Physics, Chemistry, Mathematics, Biology
Purpose	Admission to undergraduate science programs (BS Four-year and BS-MS Dual Degree Five-year programs) in 7 IISERs, BS Four-year program in IISc, and BS Four-year program of MSE in IIT Madras only.
Year started	2010 (15 years ago) (2010)
Duration	3 hours
Score range	-60 to +240
Offered	once in a year
Restrictions on attempts	Maximum three attempts in consecutive years, with no age limit
Regions	India
Languages	English and Hindi only
Annual number of test takers	34,751 (2023) [1] 22,320 (2022) [2]
Prerequisites	Candidates must have taken at least three subjects among Biology, Chemistry, Mathematics and Physics during their Class XII (or equivalent) examination.
Fee	₹2,000 for General/General-EWS/OBC/OBC-NCL (Central List) candidates ₹1,000 for SC/ST/PwD/Third Gender/Kashmiri Migrants (KM) candidates
Website	https://www.iiseradmission.in/

It is the only examination to get admission into the,

• 5-year BS-MS Dual Degree Programs of the IISERs,
• 4-year BS Degree Program in Economic Sciences of IISER Bhopal,
• 4-year BS Degree Program in Economic and Statistical Sciences of IISER Tirupati, and
• 4-year BS Degree Program of IIT Madras.
• 4-year B.Tech Program (Chemical Engineering, Data Science & Engineering, Electrical Engineering & Computer Science) of IISER Bhopal

It also serves as one of the channels to get admission into the 4-year BS (Research) Degree Program of IISc Bangalore.

IAT for IISERs

From 2024 onwards, admissions to IISERs are exclusively through the IISER Aptitude Test (IAT).^[7] There is no JEE Advanced channel or KVPY channel for admission in IISER anymore.

Test Pattern

IAT is conducted as a computer based test in the centers across India.

IAT consists of 60 questions: 15 questions each from Biology, Chemistry, Mathematics, and Physics.

Total time for answering the test is 3 hours. Questions are of multiple choice type with only one correct answer.

• Each correct answer is awarded 4 marks.
• Each incorrect answer leads to the deduction of 1 mark.
• Unanswered questions are awarded 0 mark.
• Therefore, maximum marks awarded in IAT are 240.

The total marks obtained by a candidate out of 240 is considered for preparing the Rank List.

Not every candidate appearing in IAT is awarded a rank. Rank cut-off is announced at an appropriate time. Further, getting a rank does not guarantee offer/admission to an IISER.^[8]

Syllabus

The syllabus broadly follows the NCERT syllabus for classes 11 and 12. For 2025 exam, it will follow the rationalized syllabus of 2024-25.^[9]

Syllabus for IAT^[9]

Biology	Chemistry	Mathematics	Physics
Diversity in the living world Structural Organization in Animals and Plants Cells: Structures and Functions Plant and Animal physiology Human physiology Reproduction Genetics and evolution Biology and human welfare Biotechnology and its application Ecology and environment	Basic Principles of Chemistry Structure of the Atom Classification of Elements and Periodicity in Properties Chemical Bonding and Molecular Structure Thermodynamics Equilibrium Redox Reactions Organic Chemistry – Some Basic Principles and Techniques Hydrocarbons Solutions Electrochemistry Chemical Kinetics The d- & f-block elements Coordination compounds Haloalkanes and haloarenes Alcohols, phenols and ethers Aldehydes, ketones and carboxylic acids Organic compounds containing nitrogens Biomolecules	Sets Relations and functions Trigonometric Functions Inverse Trigonometric Functions Complex Numbers and Quadratic Equations Linear Inequalities Permutations and Combinations Binomial Theorem Sequences and Series Straight Lines Conic Sections Three Dimensional Geometry Limits and Derivatives Statistics Probability Matrices Determinants Continuity and Differentiability Application of Derivatives Integrals Applications of integrals Differential equations Vectors	Physical World and Measurement Kinematics Laws of Motion Work, Energy and Power Motion of Systems of Particles and Rigid body Gravitation Properties of bulk matter Thermodynamics Behavior of a perfect gas and Kinetic Theory Oscillations Waves Electrostatics Current Electricity Magnetic effect of current and magnetism Electromagnetic Induction Alternating Current Electromagnetic Waves Optics Dual Nature of Radiation and Matter Atoms Nuclei Semicounductor and Electronic devices