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TS EAMCET 2023 12th May Morning Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the TS EAMCET 2023 12th May Morning Shift 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 shift as a PDF.

This paper has 160 questions in total - 46 easy (29%), 85 moderate (53%) and 29 tough (18%). That's a fairly typical mix for this exam. By subject: Mathematics 33% easy, 48% moderate, 20% tough; Chemistry 18% easy, 78% moderate, 5% tough; Physics 33% easy, 40% moderate, 28% tough.

Chemistry questions were spread across 28 chapters, with p Block Elements (Group 15, 16, 17 & 18) (4), Chemical Bonding and Molecular Structure (3), and Hydrocarbons (3) carrying the most weight. Mathematics questions were spread across 24 chapters, with Circle (7), Indefinite Integration (6), and Complex Number (5) carrying the most weight. Physics questions were spread across 27 chapters, with Magnetic Effects of Current (3), Current Electricity (2), and Electromagnetic Induction (2) carrying the most weight.

Chemistry

  1. 1The radius of third orbit of hydrogen atom is . The radius of second orbit of ion (in pm is)12 May, 2023 (M)Bohr's model
  2. 2The threshold frequency of a metal is . The ratio of maximum kinetic energies of the photoelectrons, when the metal is made to strike with r12 May, 2023 (M)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  3. 3Consider the following (I) The order of first ionisation enthalpy of first three elements of period is (II) The element with electronegativi12 May, 2023 (M)Periodic properties
  4. 4Match the following The correct answer is12 May, 2023 (M)Hybridisation and VSEPR Theory
  5. 5In which of the following set of molecules the hybridisation of central atoms is different?12 May, 2023 (M)Hybridisation and VSEPR Theory
  6. 6At and 760 torr pressure, the density of a mixture of and gases is . The mass percent of oxygen approximately is12 May, 2023 (M)Gas laws and Ideal Gas Equation
  7. 7The equivalent weight of which of the following is maximum? (Given: atomic weights12 May, 2023 (M)Equivalence concept
  8. 8If 2.5 moles of an ideal gas at a certain temperature are allowed to expand isothermally and reversibly from an initial volume of to , the w12 May, 2023 (M)First Law and Basic Fundamentals of Thermodynamics
  9. 9A solution is prepared by mixing of acetic acid and of sodium acetate and diluted to . If the of acetic acid is 4.76 , then the of the solut12 May, 2023 (M)Salt Hydrolysis
  10. 10Consider the following statements about the hydrides (I) Sodium hydride with water liberates oxygen gas (II) Methane, silane are examples of12 May, 2023 (M)Hydrides
  11. 11The nitrate of which of the following metals does not liberate gas on heating?12 May, 2023 (M)Nitrogen and Its Compounds
  12. 12Match the following The correct answer is12 May, 2023 (M)Properties of S-block elements
  13. 13What are the correct statements about the elements of group 13 given below? (I) The stability of +1 oxidation state follows the order (II) B12 May, 2023 (M)Aluminium and Its Compounds
  14. 14Assertion (A): Graphite is used as a dry lubricant in machines which run at high temperatures Reason (R): The layers of graphite slip one ov12 May, 2023 (M)Carbon and Its Compounds
  15. 15The correct IUPAC name of the compound given under is12 May, 2023 (M)IUPAC Nomenclature
  16. 16In which of the following hyper conjugation is not possible?12 May, 2023 (M)Conjugation and Aromaticity
  17. 17I. II. The functional groups in and are respectively12 May, 2023 (M)Reactions of alkenes
  18. 18Identify the major product in the given sequence of reactions12 May, 2023 (M)Reactions of alkenes
  19. 19At , copper (atomic mass ) has fcc structure with an edge length of . The density of copper (in ) at that temperature approximately is12 May, 2023 (M)Cubic system
  20. 20The vapour pressure of a pure liquid is 70 torr at 300 . It forms an ideal solution with another liquid B. The mole fraction of B is 0.2 and12 May, 2023 (M)Vapour pressure and raoult's law
  21. 21The electrode potential of chlorine electrode is maximum, when the concentration of chloride ion in the solution (in is . What is the value 12 May, 2023 (M)Cells and Electrode Potential, Nernst Equation
  22. 22If benzene diazonium chloride undergoes first order decomposition at with a rate constant of , the time for completion of of the reaction (i12 May, 2023 (M)Rate law and rate constant
  23. 23Identify the factors which favour the physical adsorption from the following. (I) High surface area (II) Low temperatures (III) High tempera12 May, 2023 (M)Adsorption
  24. 24Sphalerite, siderite and malachite are the ores of metals and . The atomic numbers of them are respectively.12 May, 2023 (M)Minerals and ores
  25. 25Consider the reaction Identify the reaction in which is not the product. (Equations are not balanced)12 May, 2023 (M)Phosphorus and Its Compounds
  26. 26The oxidation states of sulphur atoms and number of S- bonds in Peroxydisulfuric acid are respectively.12 May, 2023 (M)Sulphur and Its Compounds
  27. 27Identify the correct statements from the following12 May, 2023 (M)Halogens and Its Compounds
  28. 28The correct statements regarding and are has square pyramidal geometry has linear geometry has bonds and 1 lone pair of electrons on the cen12 May, 2023 (M)Hybridisation and VSEPR Theory
  29. 29The number f-electrons in +3 oxidation state of gadolinium is and in +2 oxidation state of Ytterbium is . The sum of and is12 May, 2023 (M)F-Block elements
  30. 30Match the following The correct answer is12 May, 2023 (M)Crystal Field Theory
  31. 31Amongst the following, how many of them come under the category of elastomers? Natural rubber, polyethene, vulcanized rubber, bakelite, poly12 May, 2023 (M)Classification of Polymers
  32. 32Which of the following is the incorrect statement about maltose?12 May, 2023 (M)Disaccharides and Polysaccharides
  33. 33Which of the following is not correctly matched?12 May, 2023 (M)Drugs and It's Classification
  34. 34Which of the following is least reactive towards reaction?12 May, 2023 (M)Preparation and Properties of Monohalides
  35. 35Phenol is mainly manufactured from a compound by subjecting it to oxidation in air followed by treating with dilute acid. Identify the compo12 May, 2023 (M)Preparation of Phenols
  36. 36Identify and from the following reactions (I)12 May, 2023 (M)Reactions of alkenes
  37. 37What are the products and respectively in the reactions I and II?12 May, 2023 (M)Preparation and Properties of Alcohols
  38. 38Consider the following reaction sequence The correct statements about are I. It gives yellow precipitate with and solution II. It undergoes 12 May, 2023 (M)Reactions for ketones
  39. 39Identify the product ' ' in the following sequence of reactions.12 May, 2023 (M)Preparation and Properties of Amines
  40. 40Conversion of to is an example of the reaction12 May, 2023 (M)Preparation and Properties of Isocyanides

Mathematics

  1. 1The range of the function is12 May, 2023 (M)Range
  2. 2If is a non-singular matrix such that denotes the null matrix , then12 May, 2023 (M)Product of Matrices
  3. 3If and are complex number such that then the difference in the amplitudes of and is12 May, 2023 (M)Conjugate, modulus and argument
  4. 4If then12 May, 2023 (M)Power of iota
  5. 5If one root of the equation is the reciprocal of the other, then the value of is12 May, 2023 (M)Relation between Roots and Coefficients
  6. 6If the expression is of the form , then the values of are12 May, 2023 (M)N degree equation
  7. 7The number of ways of arranging all the letters of the word "SUNITHA" so that the vowels always occupy the first, middle and last places is12 May, 2023 (M)Factorial
  8. 8If the term independent of in the expansion of is 405 , then12 May, 2023 (M)Terms of Binomial Expansion
  9. 9If then12 May, 2023 (M)Integration using Partial Fraction
  10. 10For , if , then12 May, 2023 (M)Basic Identities & T Ratios
  11. 11If then12 May, 2023 (M)Basic Identities & T Ratios
  12. 12In an isosceles right angled triangle, a straight line is drawn from the mid point of one of the equal sides to the opposite vertex. Then a 12 May, 2023 (M)Measurement of Angles
  13. 13If the position vectors of and are and respectively, then the cosine of the angle between and -axis is12 May, 2023 (M)Algebra of Vectors
  14. 14are three-unit vectors such that and is perpendicular to . If makes angles with respectively, then12 May, 2023 (M)Product of 2 vectors
  15. 15Two numbers and are chosen at random in succession without replacement from the set . Then the probability that is12 May, 2023 (M)Classical Definition of Probability
  16. 16A student is given 6 questions in an examination with true or false type of answers. If he writes 4 or more correct answers, he passes in th12 May, 2023 (M)Bernoulli Trial and Binomial Distribution
  17. 17If is a probability distribution function of a random variable , then the value of is12 May, 2023 (M)Total Probability
  18. 18If is parameter, and then the locus of the centroid of is12 May, 2023 (M)Coordinate System
  19. 19The angle by which the coordinate axes are to be rotated about the origin so that the transformed equation of would be free from xy term is12 May, 2023 (M)Coordinate System
  20. 20If the slope of a straight line passing through is , then the coordinates of the two points on the same line that are 5 units away from are12 May, 2023 (M)Basic Forms of Straight Line
  21. 21The range of ' ' so that represents two distinct lines is12 May, 2023 (M)Condition for 2nd degree equationto represent pair of straight lines
  22. 22If a diameter of the circle is a chord of a circle whose centre is at , then the radius of is12 May, 2023 (M)line and circle
  23. 23If a circle passing through touches the -axis, then the locus of the other end of the diameter through is12 May, 2023 (M)Equation of Circle & its intercept
  24. 24If two circles and intersect at and , then the focus of the parabola whose directrix is the line and vertex is the point is12 May, 2023 (M)Common Chord
  25. 25A particle is travelling in clockwise direction on the ellipse . If the particle leaves the ellipse at the point on it and travels along the12 May, 2023 (M)Tangent to ellipse
  26. 26If the equation of a hyperbola is , then the equation of its conjugate hyperbola is12 May, 2023 (M)Asymptotes
  27. 27If the direction cosines of two lines are connected the relations and , then the angle between those lines is12 May, 2023 (M)Direction Cosines and Direction Ratios
  28. 28The sum of the squares of the perpendicular distances of a point from the coordinate axes is times the square of the distance of the point f12 May, 2023 (M)Basics of point in 3 dimension
  29. 29Equation of the plane through the mid-point of the line segment joining the points and and perpendicular to is12 May, 2023 (M)Plane in Space
  30. 30Preview not available - open to view this question.12 May, 2023 (M)Algebraic and Rational Limits
  31. 31If is a vector such that and , then equation of the line passing through the point and parallel to is12 May, 2023 (M)Product of 2 vectors
  32. 32The equation of the normal at to the curve is12 May, 2023 (M)Tangent Normal
  33. 33Preview not available - open to view this question.12 May, 2023 (M)Fundamental of Indefinite Integration
  34. 34Preview not available - open to view this question.12 May, 2023 (M)Properties of Definite Integration
  35. 35Two tangents are drawn from the point to the parabola . If is the angle between these tangents, then12 May, 2023 (M)Angle between lines
  36. 36If is defined by , then the range of is12 May, 2023 (M)Range
  37. 37If and , then12 May, 2023 (M)Expansion of Determinants
  38. 38If is purely real then12 May, 2023 (M)Algebra of complex numbers
  39. 39If , then the term of the series is12 May, 2023 (M)Polar and Euler Form
  40. 40If is a common factor of the expressions and , then12 May, 2023 (M)Common Roots
  41. 41The roots of the equation are in12 May, 2023 (M)N degree equation
  42. 42The number of all four digit numbers that can be formed with the digits when the repetition of the digits is not allowed, is12 May, 2023 (M)Factorial
  43. 43The number of rational terms in the binomial expansion of is12 May, 2023 (M)Terms of Binomial Expansion
  44. 44The value of tan 1° tan 2° tan 3° tan 89° is equal to12 May, 2023 (M)Sum and Difference & Multiple angle Formula
  45. 45In a triangle , if , then12 May, 2023 (M)Circle Connected to Triangle
  46. 46The position vectors of the points are respectively. If the position vector of the point is , then12 May, 2023 (M)Algebra of Vectors
  47. 47If then12 May, 2023 (M)Product of 2 vectors
  48. 48In a non-leap year, the probability of getting 53 Sunday or 53 Tuesday or 53 Thursday is12 May, 2023 (M)Addition and Subtraction Theorems
  49. 49If each of the points lies on the line joining the points and then the point lies on the line12 May, 2023 (M)Basic Forms of Straight Line
  50. 50If is the centre of the circle that touches the Y-axis at and makes an intercept of length 2 units on positive -axis, then12 May, 2023 (M)Equation of Circle & its intercept
  51. 51The equations of the tangents to the circle drawn from the point are12 May, 2023 (M)Pair of Tangents
  52. 52The equation of the parabola with as directrix and as focus is12 May, 2023 (M)standard equation of parabola
  53. 53If an ellipse with foci at and is passing through the origin, then the eccentricity of that ellipse is12 May, 2023 (M)Equation of Ellipse
  54. 54If and are non-zero real numbers and , then12 May, 2023 (M)Exponential and logarithmic limits
  55. 55If then12 May, 2023 (M)Differentiation of composite functions
  56. 56If and then12 May, 2023 (M)Parametric differentiation
  57. 57If , then12 May, 2023 (M)Integration by Parts
  58. 58Preview not available - open to view this question.12 May, 2023 (M)Miscellaneous
  59. 59If and are respectively the order and degree of the differential equation of the family of parabolas with origin as its focus and X-axis as 12 May, 2023 (M)Order and Degree
  60. 60If , then12 May, 2023 (M)Composite Function
  61. 61is a square matrix and . If 0 then12 May, 2023 (M)Trace of a Matrix
  62. 62If are non-zero integers and is a purely imaginary number, then minimum value of is12 May, 2023 (M)Algebra of complex numbers
  63. 63The sum of the roots of the equation is12 May, 2023 (M)N degree equation
  64. 64The number of four digit numbers that can be formed using the digits which are divisible by 4 , when the repetition of any digit is not allo12 May, 2023 (M)Factorial
  65. 65The coefficient of in the expansion of is12 May, 2023 (M)Terms of Binomial Expansion
  66. 66Preview not available - open to view this question.12 May, 2023 (M)Basic Identities & T Ratios
  67. 67If then12 May, 2023 (M)Integration by Parts
  68. 68If and are two events in a random experiment such that then12 May, 2023 (M)Addition and Subtraction Theorems
  69. 69The image of every point lying on the curve in the line satisfies the equation.12 May, 2023 (M)Point and Line
  70. 70If the inverse of with respect to a circle is , then polar of with respect to that circle is12 May, 2023 (M)Pole and Polar
  71. 71The derivative of with respect to at is12 May, 2023 (M)Derivative of f(x) wrt g(x)
  72. 72If the function attains its relative maximum value at then12 May, 2023 (M)Maxima Minima
  73. 73If , then12 May, 2023 (M)Integration by Parts
  74. 74is the greatest integer function then12 May, 2023 (M)Miscellaneous
  75. 75The general solution of is12 May, 2023 (M)Linear Differential Equation
  76. 76If the system of equations can be solved by matrix inversion method then12 May, 2023 (M)System of Linear Equations
  77. 77If the slope of the tangent drawn to the curve at the point is -2 , then the value of is12 May, 2023 (M)Tangent Normal
  78. 78If the tangent drawn at the point on the circle meets the straight line at a point on the Y-axis, then the length of is12 May, 2023 (M)Tangent to circle
  79. 79If is a positive integer greater than 1 and , then12 May, 2023 (M)Fundamental of Indefinite Integration
  80. 80If is defined on such that , then12 May, 2023 (M)Properties of Definite Integration

Physics

  1. 1If and are the relative strengths of the gravitational, the weak nuclear and the electromagnetic forces respectively, then12 May, 2023 (M)Units
  2. 2Which of the following pairs has same dimensions?12 May, 2023 (M)Dimensions
  3. 3The relation between time and distance of a particle is , where and are constants. If is the velocity of the particle, then its acceleration12 May, 2023 (M)Rest and Motion
  4. 4A bomb is dropped on an enemy post on the ground by an aeroplane flying horizontally with a velocity of at a height of . At the time of drop12 May, 2023 (M)Projectile motion
  5. 5The angular speed of a particle moving in a circular path is doubled. Then, the centripetal acceleration of the particle is12 May, 2023 (M)Uniform Circular Motion
  6. 6Two bodies of masses of and are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is12 May, 2023 (M)Energy
  7. 7The displacement 's' of a body of mass under the action of a force is given by , where ' ' is in metres and ' ' is in seconds. The work done12 May, 2023 (M)Work done
  8. 8A system consists of two particles of masses and . If the particle of mass is moved towards the centre of mass through a distance , then the12 May, 2023 (M)Centre of mass of discrete particles
  9. 9If the radius of the earth becomes times its present value, the new period of rotation in hours is12 May, 2023 (M)Rotational kinematics
  10. 10For a particle executing simple harmonic motion, the kinetic energy of the particle at a distance of from the mean position is of the maximu12 May, 2023 (M)Simple Harmonic Motion
  11. 11A wire of length is stretched by . The strain on the wire is12 May, 2023 (M)Young’s Modulus and Breaking Stres
  12. 12A straw of circular cross-section of radius and negligible thickness is dipped vertically into a liquid of surface tension . If the contact 12 May, 2023 (M)Surface tension
  13. 13A solid metal sphere released in a vertical liquid column has attained terminal velocity in the downward direction. The magnitudes of viscou12 May, 2023 (M)Viscosity
  14. 14Two objects made of the same material have masses ' ' and ' ' and are at temperatures ' ' and ' ' respectively. When heat ' ' is supplied to12 May, 2023 (M)Calorimetry
  15. 15On a new temperature scale, the melting point of ice is 20 and the boiling point of water is . A temperature of would be indicated on this n12 May, 2023 (M)Thermometry
  16. 16The percentage of heat supplied to a diatomic ideal gas that is converted into work in an isobaric process is12 May, 2023 (M)Thermodynamic Processes
  17. 17Ratio of translational degrees of freedom to rotational degrees of freedom of a polyatomic linear gas molecule is12 May, 2023 (M)Degree of Freedom and Specific Heat
  18. 18A ring has a mass and radius . The distance of the point on its geometric axis from its centre at which the gravitational field is strongest12 May, 2023 (M)Gravitational field
  19. 19A heavy uniform rope is suspended vertically from a ceiling and is in equilibrium. A pulse is generated at the bottom end of the rope as sho12 May, 2023 (M)Newton’s Law of Gravitation
  20. 20A wave is given by the equation then the velocity of the wave is ( and are in metre and is in second)12 May, 2023 (M)Travelling Waves
  21. 21An empty tank has concave mirror as its bottom. When sunlight falls normally on the mirror, it is focussed at a height of from the mirror. I12 May, 2023 (M)Mirror Formula, Reflection in Spherical Mirror
  22. 22When Young's double slit experiment is performed in air, the Y-coordinates of central maxima and maxima are and respectively. If the apparat12 May, 2023 (M)Youngs Double Slit Experiment
  23. 23A clock dial has point charges at the positions of the corresponding numbers on the dial respectively. The time at which the hour's hand poi12 May, 2023 (M)Electric Field and Electric Field Lines
  24. 24The electric potential at a place is varying as volt. Then the electric field at and is12 May, 2023 (M)Electric Potential and Potential Energy
  25. 25When a potentiometer is connected between the points and as shown in the circuit, balance point is obtained at . When it is cornected betwee12 May, 2023 (M)Electric Instruments
  26. 26In the given part of a circuit, the potential at point is zero. Then the potentials at and respectively are12 May, 2023 (M)Resistance and Resistivity
  27. 27A conducting wire carries a current as shown in the figure. It is placed in a uniform magnetic field 5 which is acting normally outside from12 May, 2023 (M)Force and Torque on Current Carrying Conductor
  28. 28A long straight wire carries a current of . The magnitude of the magnetic field at a point from it is12 May, 2023 (M)Magnetic Field
  29. 29A bar magnet has coercivity . It is placed inside a solenoid of length and 60 turns. The current that should be passed through the solenoid 12 May, 2023 (M)Magnetic Field
  30. 30When a current ' ' through a solenoid is increasing at a constant rate then the induced current is12 May, 2023 (M)Induced Electric Field
  31. 31In a pair of adjacent coils if the current in one coil changes from to in a time , an emf of is induced in another coil. The mutual inductan12 May, 2023 (M)Self and Mutual Inductance
  32. 32The power factor of an circuit containing peak current and peak voltage is , then the angle between voltage and current is12 May, 2023 (M)Quality and Power Factor
  33. 33If a plane electromagnetic wave has electric field oscillations of frequency then the wavelength of the wave is (speed of light in vacuum )12 May, 2023 (M)Electromagnetic Waves and Maxwell's equations
  34. 34The de Broglie wavelength of an electron accelerated between two plates having a potential difference of 900 is neariy.12 May, 2023 (M)Matter Waves
  35. 35If an electron is moving in the orbit of the hydrogen atom then the angular momentum of the electron in SI units is12 May, 2023 (M)Bohr's Atomic Model
  36. 36The energy equivalent to a mass of is12 May, 2023 (M)Nuclear energy
  37. 37If is the surface area of a nucleus of mass number , th en12 May, 2023 (M)Nuclear structure
  38. 38In a transistor, the base current is and the emitter current is , then the collector current is12 May, 2023 (M)Junction Transistors
  39. 39If the output of a NAND gate is given as input to a NOT gate, the resultant gate is12 May, 2023 (M)Logic gates
  40. 40A message signal of frequency is used to modulate a carrier wave of frequency , then the side band frequencies are12 May, 2023 (M)Modulation

Frequently Asked Questions

1.How many questions are in the TS EAMCET 2023 12th May Morning Shift paper?

This paper has 160 questions in total - 40 from Chemistry, 80 from Mathematics, and 40 from Physics.

2.Can I practise questions from just one subject?

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

3.Is this the same paper for all students who appeared in the morning shift?

TS EAMCET uses different question sets across shifts and sessions to maintain exam integrity, so this page reflects the specific paper administered in the 12th May 2023 morning shift.

4.Where can I find the evening shift paper for the same date?

The TS EAMCET 2023 12th May Evening Shift paper is listed separately - you can switch to it from the "TS EAMCET Paper Wise PYQs" panel, under TS EAMCET 12th May 2023.

5.How is the TS EAMCET 2023 12th May Morning Shift paper structured?

The TS EAMCET 2023 12th May Morning Shift paper on MARKS has 160 questions, organised by subject:

  • Chemistry: 40 questions - 40 single-correct.
  • Mathematics: 80 questions - 80 single-correct.
  • Physics: 40 questions - 40 single-correct.
6.How difficult is the TS EAMCET 2023 12th May Morning Shift paper?

Each question on MARKS carries a difficulty rating. Of the 160 rated questions in this paper, 46 (29%) are easy, 85 (53%) are medium and 29 (18%) are hard. Subject wise:

  • Chemistry: 7 easy, 31 medium, 2 hard
  • Mathematics: 26 easy, 38 medium, 16 hard
  • Physics: 13 easy, 16 medium, 11 hard
7.Which chapters were asked the most in the TS EAMCET 2023 12th May Morning Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: p Block Elements (Group 15, 16, 17 & 18) (4), Chemical Bonding and Molecular Structure (3), and Hydrocarbons (3).
  • Mathematics: Circle (7), Indefinite Integration (6), and Complex Number (5).
  • Physics: Magnetic Effects of Current (3), Current Electricity (2), and Electromagnetic Induction (2).
8.Where can I find the solutions for the TS EAMCET 2023 12th May Morning Shift 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 shift is coming soon.

9.How should I use the TS EAMCET 2023 12th May Morning Shift paper to check my preparation?

Set a timer, attempt the 160 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 TS EAMCET. Repeating this with other papers shows whether the same weak spots keep coming back.

10.Will the TS EAMCET 2023 12th May Morning Shift paper help me prepare for TS EAMCET 2027?

Yes. Every past paper shows the question styles and topics TS EAMCET 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.