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  1. Prepare for an exam
  2. /IAT (IISER)
Exam preparation

IAT (IISER) preparation

The IISER Aptitude Test is the common entrance test for the seven IISERs, and other institutes such as IISc Bengaluru also use it. It has 60 multiple-choice questions, 15 each in Physics, Chemistry, Mathematics and Biology. A wrong answer costs one mark, so answer with care.

1,639 questions · 1,107 problems

With a Standard plan

Paper pattern

The IAT (IISER) exams follow this pattern.

The real exam: Computer-based, 180 minutes, 60 single-answer multiple-choice questions, 15 each in Biology, Chemistry, Mathematics and Physics; +4 right, -1 wrong, 0 unanswered; 240 marks.

IAT (IISER) syllabus

102 units in Physics, Chemistry, Mathematics and Biology. Source: IISER Aptitude Test (IAT) 2026 Information Brochure, Joint Admissions Committee 2026 (IISER Berhampur), March 2026, section Syllabi for IAT 2026 (http://info.iiseradmission.in/assets/pdfs/IB_IAT_2026_ENG.pdf; same list in https://iiseradmission.in/assets/pdfs/IISER_Aptitude_Test_Syllabus_2026.pdf). Read 2026-11-09.

Physics · 28 units
  • Units and Measurements
  • Motion in a Straight Line
  • Motion in a Plane
  • Laws of Motion
  • Work, Energy and Power
  • System of Particles and Rotational Motion
  • Gravitation
  • Mechanical Properties of Solids
  • Mechanical Properties of Fluids
  • Thermal Properties of Matter
  • Thermodynamics
  • Kinetic Theory
  • Oscillations
  • Waves
  • Electric Charges and Fields
  • Electrostatic Potential and Capacitance
  • Current Electricity
  • Moving Charges and Magnetism
  • Magnetism and Matter
  • Electromagnetic Induction
  • Alternating Current
  • Electromagnetic Waves
  • Ray Optics and Optical Instruments
  • Wave Optics
  • Dual Nature of Radiation and Matter
  • Atoms
  • Nuclei
  • Semiconductor Electronics: Materials, Devices and Simple Circuits

Question sets

No timer. Work at your own pace.

  • PhysicsJEE Advanced Physics: Electrostatic Potential and Capacitance12 questions
  • PhysicsJEE Advanced Physics: Moving Charges and Magnetism12 questions
  • PhysicsJEE Advanced Physics: Electric Charges and Fields

Practice questions and problems

Hardest first. Try each one on paper before you see the answer.

Physics

Questions

  • AdvancedA sample starts as a pure radioactive nuclide A, of half-life 6.0 h. Each nucleus of A decays into a nucleus of B, which is itself radioactive, with a half-life of 2.0 h, and decays into a stable nuclide. After how long is the activity of B in the sample greatest?
  • AdvancedIn a double-slit experiment the slits are 0.40 mm apart and the screen is 1.00 m away. The slits are lit at the same time by light of wavelengths 600 nm and 450 nm. Which of the following statements are correct?

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Chemistry · 19 units
  • Some Basic Concepts of Chemistry
  • Structure of the Atom
  • Classification of Elements and Periodicity in Properties
  • Chemical Bonding and Molecular Structure
  • The d- and f-Block Elements
  • Coordination Compounds
  • Thermodynamics
  • Equilibrium
  • Redox Reactions
  • Solutions
  • Electrochemistry
  • Chemical Kinetics
  • Organic Chemistry: Some Basic Principles and Techniques
  • Hydrocarbons
  • Haloalkanes and Haloarenes
  • Alcohols, Phenols and Ethers
  • Aldehydes, Ketones and Carboxylic Acids
  • Organic Compounds Containing Nitrogen
  • Biomolecules
Mathematics · 23 units

Sets and Logic

  • Set
  • Relations and Functions

Basic Counting Techniques

  • Permutations and Combinations
  • Binomial Theorem

Complex Numbers, Linear and Quadratic Equations

  • Complex Numbers
  • Quadratic Equations
  • Linear Inequalities

Trigonometric Functions

  • Trigonometric Functions

Vectors

  • Vectors

Matrices and Determinants

  • Matrices
  • Determinants

Coordinate Geometry

  • Straight Lines
  • Conic Sections

Three-dimensional Geometry

  • Three-dimensional Geometry

Sequences and Series

  • Sequences and Series

Limit and Continuity

  • Limit and Continuity

Differentiation

  • Differentiation
  • Application of Derivatives

Integration

  • Integration
  • Applications of Integration

Differential Equations

  • Differential Equations

Statistics, Probability and Linear Programming

  • Statistics
  • Probability
Biology · 32 units

Diversity in the Living World

  • The Living World
  • Biological Classification
  • Plant Kingdom
  • Animal Kingdom

Structural Organisation in Plants and Animals

  • Morphology of Flowering Plants
  • Anatomy of Flowering Plants
  • Structural Organisation in Animals

Cell: Structure and Functions

  • Cell: The Unit of Life
  • Biomolecules
  • Cell Cycle and Cell Division

Plant Physiology

  • Photosynthesis in Higher Plants
  • Respiration in Plants
  • Plant Growth and Development

Human Physiology

  • Breathing and Exchange of Gases
  • Body Fluids and Circulation
  • Excretory Products and Their Elimination
  • Locomotion and Movement
  • Neural Control and Coordination
  • Chemical Coordination and Integration

Reproduction

  • Sexual Reproduction in Flowering Plants
  • Human Reproduction
  • Reproductive Health

Genetics and Evolution

  • Principles of Inheritance and Variation
  • Molecular Basis of Inheritance
  • Evolution

Biology in Human Welfare

  • Human Health and Disease
  • Microbes in Human Welfare

Biotechnology

  • Biotechnology: Principles and Processes
  • Biotechnology and Its Application

Ecology

  • Organisms and Populations
  • Ecosystem
  • Biodiversity and Conservation
12 questions
  • MathematicsMaths Olympiad: Combinatorics, Geometry and Inequalities6 questions
  • MathematicsJEE Advanced Maths: Integrals and Their Applications12 questions
  • MathematicsJEE Advanced Maths: Derivatives and Their Applications12 questions

    • All IAT (IISER) question sets →

    Advanced
    Two long, smooth, horizontal metal rails, 0.50 m apart, lie in a uniform vertical magnetic field of 0.80 T. At one end they are joined by an uncharged capacitor of 0.50 F. A metal rod of mass 0.20 kg lies across the rails, as in the figure, and is given a push so that it starts sliding away from the capacitor at 7.0 m/s. No other force acts along the rails. The rod and rails together have a resistance of 2.0 Ω. How much heat is produced in the circuit in all, by the time the current has stopped?
  • AdvancedA uniform magnetic field of 0.20 T fills the region to the right of a straight boundary and points out of the page, as in the figure. A proton moving at 2.0 × 10⁶ m/s crosses the boundary into the field, at 30° to the normal, tilted towards the top of the page. Take the proton's mass as 1.67 × 10⁻²⁷ kg and its charge as 1.6 × 10⁻¹⁹ C. Which of the following statements are correct?
  • AdvancedA metal sphere of radius 12 cm carries no net charge. Inside it there is a small spherical cavity, not at the centre, and a point charge q = +3.0 nC sits inside the cavity, away from the cavity's centre. A second point charge Q = +5.0 nC is held outside, 40 cm from the centre of the sphere. Take 1/4πε₀ = 9.0 × 10⁹ N m²/C². Which of the following statements are correct?
    • More Physics questions for IAT (IISER) →

    Problems with worked solutions

    • AdvancedA radio antenna stands on the edge of a cliff, at a height h = 120 m above a calm sea, and points…
    • AdvancedA large flat coil of 500 turns and radius R = 20 cm carries a steady current of 4.0 A…
    • AdvancedIn a vacuum chamber there is a uniform electric field of 2.0 × 10⁴ V/m along +y and a uniform…
    • AdvancedTwo equal capacitors, each of C = 100 µF, and two equal resistors, each of R = 10 kΩ, make a…
    • AdvancedA metal sphere of radius R = 10.0 cm stands on an insulating stand in a large empty room…
    More Physics problems for IAT (IISER) →

    Chemistry

    Questions

    • HardA gene has the sequence GAG in its coding strand, and a mutation changes it to GTG. The change in the protein is that
    • HardA circular DNA of 2000 base pairs is stretched out into a straight double helix. How long is it, in micrometres?
    • HardHow many stereoisomers does the dipeptide Ala-Thr have? Count every combination of D and L at each stereocentre. Alanine has one stereocentre and threonine has two.
    • HardBy how much, in kJ/mol, must an enzyme lower the activation energy of a reaction at 298 K to make it exactly ten times faster? Use R = 8.314 J/(mol K) and assume the same frequency factor.
    • HardAssertion (A): Milk curdles when it turns sour. Reason (R): The acid brings the pH close to the isoelectric point of casein, where the protein has no net charge and clumps together.
    More Chemistry questions for IAT (IISER) →

    Problems with worked solutions

    • AdvancedA 25.0 mL sample contains both hydrochloric acid and acetic acid…
    • AdvancedA cell is built from a hydrogen electrode and a silver chloride electrode, both dipping into the…
    • AdvancedSilver chloride is far too insoluble for its solubility to be weighed easily, but a cell measures…
    • AdvancedThree electrolytic cells are joined in series to a battery, as the figure shows, so the same…

    Mathematics

    Questions

    • AdvancedEach statement below is about points or whole numbers chosen in any way at all, and claims that a certain pair must always exist. One or more of the statements are true. Which are they? In (A) and (B) the points may lie inside the shape or on its boundary.
    • AdvancedPositive real numbers a, b and c satisfy a + b + c = 12, and apart from this they may be chosen freely. What is the greatest possible value of the product ab²c³, in which b appears squared and c appears cubed?
    • AdvancedThe figure shows a regular polygon with 12 vertices, all on one circle. Any three of the vertices form a triangle, which gives C(12, 3) = 220 triangles in all. How many of these triangles are acute-angled, that is, have all three angles less than 90°?
    • AdvancedFour married couples, eight people in all, sit at a round table with eight equal chairs. Two seatings count as the same when one is a rotation of the other, but a seating and its mirror image count as different. In how many seatings does no husband sit next to his own wife?
    • AdvancedThe figure shows the graph of a function f on [0, 12]. It is made of three straight pieces joining the points (0, 0), (3, 6), (9, 0) and (12, -3): a steep rise, a slow fall, and a dip below the axis. For 0 ≤ x ≤ 9 let F(x) = ∫xˣ⁺³ f(t) dt, the area under the graph over a window of width 3 that slides along the axis. The window catches the most area when its two ends are at the same height, but the peak of f need not sit in the middle of the window. What is the greatest value of F(x) for 0 ≤ x ≤ 9?
    More Mathematics questions for IAT (IISER) →

    Problems with worked solutions

    • AdvancedA ranger in Cornwall is protecting a sand dune from walkers…
    • AdvancedIn a round-robin tournament every two teams play each other exactly once, and every match has a…
    • AdvancedA 7 × 7 board has its rows numbered 0 to 6 from the top and its columns numbered 0 to 6 from the…
    • AdvancedLet f(x) = x³ + x. Since f'(x) = 3x² + 1 > 0, the function f increases on the whole real line, and…
    • All 1,107 IAT (IISER) problems →
    • All 1,639 IAT (IISER) questions →
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    • Advanced
    Hydrogen peroxide breaks down slowly in water, but iodide ions speed it up: 2 H₂O₂(aq) → 2 H₂O(l) +…
    More Chemistry problems for IAT (IISER) →
    Advanced
    A definite integral is a limit of sums, and this works in both directions…
    More Mathematics problems for IAT (IISER) →