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IAT (IISER) 2018

Browse the complete Biology, Chemistry, Mathematics, and Physics question set from the IAT (IISER) 2018 paper, question by question. Each question shows a quick preview so you can jump straight to the topic or subject you want to revise. Click through to attempt the full question in practice mode, or head back to the paper-wise list to download the entire paper as a PDF.

This paper has 60 questions in total - 20 easy (33%), 33 moderate (55%) and 7 tough (12%). That's a fairly typical mix for this exam. By subject: Biology 60% easy, 40% moderate, 0% tough; Chemistry 40% easy, 53% moderate, 7% tough; Mathematics 20% easy, 53% moderate, 27% tough; Physics 13% easy, 73% moderate, 13% tough.

Biology questions were spread across 14 chapters, with Biotechnology - Principles and Processes (2), Animal Kingdom (1), and Biomolecules (B) (1) carrying the most weight. Chemistry questions were spread across 11 chapters, with d and f Block Elements (3), Amines (2), and Haloalkanes and Haloarenes (2) carrying the most weight. Mathematics questions were spread across 14 chapters, with Functions (2), Application of Derivatives (1), and Basic of Mathematics (1) carrying the most weight. Physics questions were spread across 14 chapters, with Laws of Motion (2), Atomic Physics (1), and Current Electricity (1) carrying the most weight.

Biology

  1. 1Which one of the following statements about second messengers is correct?2018Introduction
  2. 2The glomerular filtration rate is NOT affected by2018Mammalian Urinary System
  3. 3Haplo-diploid insects have diploid females from fertilized eggs but haploid males from unfertilized ones. Such a haploid male with red eyes 2018Sex Determination
  4. 4Match the entries in column I and II and choose the correct pairs from the choices below. \( {array}{ll} {Column I } & {Column II } \\ {a. H2018Pollution
  5. 5DNA fragments of 100 base pairs (bp), 300 bp and 500 bp were separated by agarose gel electrophoresis. Pick the correct arrangement of the f2018Separation and Isolation of DNA Fragments
  6. 6Meiosis involves:2018Meiosis
  7. 7Which of the following is exclusively marine?2018Phylum Echinodermata
  8. 8How many histone molecules are required to wrap roughly 60,000 base pairs (bp) of DNA?2018Packaging of DNA Helix
  9. 9All species of vultures in India are threatened with extinction. What is the most likely outcome if all vultures in India go extinct?2018Functions of Ecosystem
  10. 10A gene is inserted into the PvuII site of the cloning vector (given below) and transformed into E. coli cells. Which one of the following st2018Tools of Recombinant DNA Technology
  11. 11What are Association areas?2018Parts of Nervous System
  12. 12Match the entries in column I and II and choose the correct pairs from below: \( {array}{ll} {Column I} & {Column II} \\ {a. Golgi} & {1. Di2018Cell Organelles
  13. 13Which of the following antibodies is present abundantly in the colostrum secreted during the initial days of human lactation?2018Acquired immunity
  14. 14Which compound given below inhibits cholesterol synthesis in humans?2018Primary and Secondary Metabolites
  15. 15In the given graph curves \(A, B\) and \(C\) represent relation between partial pressure of oxygen \( ( {p}_{ {O}_2} )\) and saturation of h2018Human Respiratory System

Chemistry

  1. 1The melting point of \( {Mn}_4 {~N}\) is2018Properties of D-block elements
  2. 2Which of the following statements is valid for the dipole moment (\( \)) values of cis- and trans- \( {F}_2 {~N}_2\) ?2018Dipole moment
  3. 3Which of the following statements is correct about tetrahedral manganate and permanganate ions?2018Properties of D-block elements
  4. 4Among the lanthanides \( {Eu}, {Tb}, {Er}\) and Dy , which one readily forms stable divalent ions?2018F-Block elements
  5. 5The correct order for decreasing basic strength of the molecules \( {PH}_3, {AsH}_3, {SbH}_3\), and \( {BiH}_3\) is:2018Nitrogen and Its Compounds
  6. 6In the following reaction sequence, the major products X and Z are2018Preparation and Properties of Amines
  7. 7Select the correct order of basicity for the following compounds.2018Preparation and Properties of Amines
  8. 8Which of the following is the correct pair of intermediates responsible for the formation of \( {X}\) and \( {Y}\) as the major products, in2018Preparation and Properties of Monohalides
  9. 9In the following reaction sequence, identify the relationship between the products \( {Q}\) and \( {S}\) :2018Preparation and Properties of Alcohols
  10. 10Arrange the following compounds in increasing order of their rate of reaction towards hydroxyl ion \( ( {OH}^{-} )\).2018Preparation and Properties of Aryl Halides
  11. 11The kinetic energy of the photoelectrons ejected from a metal on irradiation with light of frequency \(3.8 10^{16} {~Hz}\) is \(K\). When ir2018Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  12. 12The heat of neutralization of the following reaction is \(-57.1 {~kJ} {~mol}^{-1}\). \( {NaOH}( {aq})+ {HCl}( {aq}) {NaCl}( {aq})+ {H}_2 {O}2018Laws of Thermochemistry and Enthalpy Change
  13. 13At \(25^{ } {C}\), the standard reduction potential for the half-cell reaction \( {Zn}( {~s})+2 {H}^{+}( {aq}) {Zn}^{2+}( {aq})+ {H}_2( {~g}2018Cells and Electrode Potential, Nernst Equation
  14. 14In a cubic-close packed structure containing \( {X}, {Y}\) and \( {Z}\) atoms, if \( {Z}\) occupies all the face centers, \( {X}\) occupies 2018Cubic system
  15. 15At 298 K, the vapour pressure of an ideal solution containing 1 mol of liquid \( {L} 1\) and 2 mol of liquid \( {L} 2\) is 500 mm Hg. When 22018Vapour pressure and raoult's law

Mathematics

  1. 1Let \(z\) be a given complex number with modulus \(|z| 1\). Then the set \( \{ {z-w}{1- {z} w}:|w|=1, w {C} \}\) is a2018Conjugate, modulus and argument
  2. 2Let \(f, g, h\) be functions from \( {R}\) to \( {R}\), with \(f\) and \(g\) invertible. Which of the following is NOT always true?2018Composite Function
  3. 3Consider a matrix \(A= ( {array}{lll}1 & 0 & 0 \\ 2 & x & y \\ 4 & 3 & 5 {array} )\) with integer entries and determinant -5. Then a possibl2018Expansion of Determinants
  4. 4The integral \( _{- { }{2}}^{ { }{2}} ( {(1+ {|x|}) ^2(x)+ (x)}{1+ {|x|}} ) d x\) is equal to2018Properties of Definite Integration
  5. 5Let \( _0\) be the line defined by the vector equation \( {i}+2 {j}+3 {k}+ ( {i}+ {j}+ {k})\), with \( \) real. Which of the following vecto2018Line in Space
  6. 6For a given matrix, let \(R_i\) denote the sum of all entries in its \(i^{ {th }}\) row and \(C_j\) denote the sum of all entries in its \(j2018Formation and Basic of Matrix
  7. 7Let \(P(n)\) be a statement for each natural number \(n\). Assume that \(P(n+1)\) is a true statement whenever \(P(n)\) is a true statement.2018Mathematical Induction
  8. 8Let \(y=f(x)\) be the equation of the curve passing through the point \((1,1)\) having slope \( _e x\) for positive values of \(x\). Then th2018Applications of DE
  9. 9How many functions \(f: {R} {R}\) satisfy \(f(1)=10\) and \(|f(x)-f(y)|=|x-y|\) for all \(x, y {R}\) ?2018Composite Function
  10. 10For a real number \(a\), let \( ^{-1}(a)\) denote the real number \( ,- { }{2} { }{2}\); such that \( ( )=a\). The function \(f(x)= ^{-1} (b2018Monotonicity
  11. 11A number is picked uniformly randomly from the set of five digit natural numbers. What is the probability that at least one of the digits of2018Classical Definition of Probability
  12. 12How many functions \(f: {N} {N}\) satisfy \( {lcm}(f(n), n)- {hcf}(f(n), n) 5 ?\) Here '1cm' denotes the least common multiple and 'hcf' den2018Ratio and Proportion
  13. 13Let \(a, b\) be distinct positive real numbers, whose geometric mean equals \( {a^{t-99}+b^{t-99}}{a^{t-100}+b^{t-100}}\). Then \(t\) must e2018Means
  14. 14Let \(f\) and \(g\) be two functions on \( {R}\) defined by \( {aligned} & f(x)= {x^2+1}-x \\ & g(x)= ( e^{1-x} ) {aligned}\) Define a funct2018Trigonometric and Inverse Trigonometric limits
  15. 15Let \( {P}\) denote a parabola in the plane and let a point \(A {P}\) be given. How many lines \( \) in the plane satsify \( {P}=\{A\} ?\)2018Line and parabola

Physics

  1. 1A cylindrical vessel of radius 5 cm is filled with water up to a height of 20 cm. The cylinder is open to atmosphere at the top. A small ape2018Efflux of liquid
  2. 2Two simple pendulums of length 1 m each, with bobs having masses 1 kg and 2 kg, are hanging from the ceiling of an elevator. The elevator st2018Applications of SHM
  3. 3What is the probability that a radioactive nucleus will not have decayed after a time equal to twice its half-life?2018Radioactivity
  4. 4An electric dipole having point charges \(+q\) and \(-q\), separated by a fixed distance \(d\) is kept under the influence of a uniform elec2018Electric Dipole
  5. 5In the circuit shown, what is the approximate current passing through the resistor ?2018Kirchoffs Laws
  6. 6An electromagnetic wave propagates along \(z\)-direction. The corresponding electric field is along \(x\)-direction. Which of the following 2018Electromagnetic Waves and Maxwell's equations
  7. 7An iron ring of radius 2.1 m is to be fitted on top of the rim of a wheel of radius 2.121 m. The coefficient of volume expansion for iron is2018Thermal Expansion
  8. 8An object of mass 100 g is sliding under gravity from point A to point B on a frictionless slide from a height of 5 m, as shown in the figur2018Energy
  9. 9A current of 45 A is passing through an infinitely long wire which lies along the axis of an infinitely long solenoid of radius 1 cm. The ma2018Magnetic Field
  10. 10For a p-n junction normal diode and a Zener diode, which of the following statements is true?2018Diodes
  11. 11Starting from rest, a car moves with a constant acceleration, and comes to a momentary stop with the same constant deceleration. Subsequentl2018Rest and Motion
  12. 12\( _2\) and \( _4\) are the wavelengths of photons required to excite the Hydrogen atom from its ground state to its second and fourth excit2018Bohr's Atomic Model
  13. 13A jeweler is holding a gold chain of uniform mass per unit length hanging vertically just above a weighing scale as shown in the figure. He 2018Newton's laws of motion
  14. 14A planet of mass \(m\) moves in an elliptical path around the Sun (which is at one of the foci of the ellipse), so that its maximum and mini2018Kepler laws
  15. 15Two posts of heights 20 m and 10 m are 60 m apart, as shown in the figure. Food grains are continuously distributed between the two posts. A2018Newton's laws of motion

Frequently Asked Questions

1.How many questions are in the IAT (IISER) 2018 paper?

This paper has 60 questions in total - 15 each from Biology, Chemistry, Mathematics, and Physics.

2.Can I practise questions from just one subject?

Yes. Use the Biology, Chemistry, Mathematics, and Physics tabs at the top of the page to jump directly to that subject's question set within this paper.

3.What is the structure of the IAT (IISER) 2018 paper?

The IAT (IISER) 2018 paper on MARKS has 60 questions, organised by subject:

  • Biology: 15 questions - 15 single-correct.
  • Chemistry: 15 questions - 15 single-correct.
  • Mathematics: 15 questions - 15 single-correct.
  • Physics: 15 questions - 15 single-correct.
4.What is the difficulty level of the IAT (IISER) 2018 paper?

Each question on MARKS carries a difficulty rating. Of the 60 rated questions in this paper, 20 (33%) are easy, 33 (55%) are medium and 7 (12%) are hard. Subject wise:

  • Biology: 9 easy, 6 medium, 0 hard
  • Chemistry: 6 easy, 8 medium, 1 hard
  • Mathematics: 3 easy, 8 medium, 4 hard
  • Physics: 2 easy, 11 medium, 2 hard
5.Which chapters had the most questions in the IAT (IISER) 2018 paper?

The chapters with the most questions in each subject were:

  • Biology: Biotechnology - Principles and Processes (2).
  • Chemistry: d and f Block Elements (3), Amines (2), and Haloalkanes and Haloarenes (2).
  • Mathematics: Functions (2).
  • Physics: Laws of Motion (2).
6.Where can I find the solutions for the IAT (IISER) 2018 paper?

Open any question on this page. Its page shows the correct answer and, where one is available, the worked solution. A downloadable PDF of the whole paper is coming soon.

7.How should I use the IAT (IISER) 2018 paper to check my preparation?

Set a timer, attempt the 60 questions as you would in the exam, and only then open the answers. Note which subjects and chapters cost you the most marks, and revise those first using the chapter-wise practice for IAT (IISER). Repeating this with other papers shows whether the same weak spots keep coming back.

8.Will the IAT (IISER) 2018 paper help me prepare for IAT (IISER) 2027?

Yes. Every past paper shows the question styles and topics IAT (IISER) has asked before, and a solved paper gives you a realistic benchmark for speed and accuracy. Use it along with the other papers to spot the chapters that keep returning.