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MHTCET 2021 23rd September Evening Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the MHTCET 2021 23rd September Evening 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 150 questions in total - 50 easy (33%), 78 moderate (52%) and 22 tough (15%). That's a fairly typical mix for this exam. By subject: Physics 38% easy, 42% moderate, 20% tough; Chemistry 34% easy, 56% moderate, 10% tough; Mathematics 28% easy, 58% moderate, 14% tough.

Chemistry questions were spread across 26 chapters, with General Organic Chemistry (5), Solid State (4), and Chemical Bonding and Molecular Structure (3) carrying the most weight. Mathematics questions were spread across 24 chapters, with Differential Equations (5), Vector Algebra (5), and Indefinite Integration (4) carrying the most weight. Physics questions were spread across 22 chapters, with Semiconductors (4), Alternating Current (3), and Current Electricity (3) carrying the most weight.

Chemistry

  1. 1In the cell represent as , the reducing agent is23 Sep, 2021 (E)Cells and Electrode Potential, Nernst Equation
  2. 2Which among the following compounds is a weakest base?23 Sep, 2021 (E)Electron displacement effects
  3. 3Identify the number of unpaired electrons present and geometry respectively of complex.23 Sep, 2021 (E)Werner's theory and Valence Bond Theory
  4. 4Which of the following alkanes is optically active?23 Sep, 2021 (E)Isomerism of Organic Compounds
  5. 5A weak monobasic acid is dissociated in it's solution. What is the dissociation constant of acid?23 Sep, 2021 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  6. 6Which among following compounds is used as monomer in preparation of Teflon?23 Sep, 2021 (E)Preparation and Properties of Polymers
  7. 7Which among the following halides has triagonal bipyramidal structure?23 Sep, 2021 (E)Hybridisation and VSEPR Theory
  8. 8What is the atomic radius of polonium if it crystallises in a simple cubic structure with edge length of unit cell ?23 Sep, 2021 (E)Cubic system
  9. 9A gas has a volume of at . What is the final temperature if the volume of gas increase to ?23 Sep, 2021 (E)Gas laws and Ideal Gas Equation
  10. 10Air is an example of a solution of23 Sep, 2021 (E)Colloids
  11. 11Identify catalyst used in manufacturing of HDP.23 Sep, 2021 (E)Preparation and Properties of Polymers
  12. 12Which statement from following is correct for hemolytic fission?23 Sep, 2021 (E)Covalent and Co-ordinate Bonding
  13. 13What is the value of intercept on y-axis when is plotted against lop P in Freundlich isotherm?23 Sep, 2021 (E)Adsorption isotherms
  14. 14Which from following statements is true for group 16 elements?23 Sep, 2021 (E)Modern periodic table
  15. 15Which among the following formulae is correctly represented according to stock notation?23 Sep, 2021 (E)Oxidation number
  16. 16Identify the major product when anisole is treated with in presence of acetic acid.23 Sep, 2021 (E)Reactions of Phenol
  17. 17All the elements of group 2 react with water to form metal hydroxide and hydrogen, except the element23 Sep, 2021 (E)Alkaline Earth Metals
  18. 18Which of the following compounds is obtained when glucose is treated with dilute nitric acid?23 Sep, 2021 (E)Preparation and Reactions of Glucose
  19. 19The order of reaction for which the units of rate constant are is23 Sep, 2021 (E)Rate law and rate constant
  20. 20Which among the following is a nonferrous alloy?23 Sep, 2021 (E)Properties of D-block elements
  21. 21Identify product ' ' in following reaction.23 Sep, 2021 (E)Preparation and Properties of Monohalides
  22. 22A balloon contains air and has a pressure of . The balloon rises to a certain height and expands to volume of . What is the final pressure o23 Sep, 2021 (E)Gas laws and Ideal Gas Equation
  23. 23Which of the following is NOT obtained when a mixture of bomomethane and bromoethane is treated with sodium in dry ether?23 Sep, 2021 (E)Properties and Preparation of Alkanes
  24. 24What is the IUPAC name of glyoxal?23 Sep, 2021 (E)IUPAC Nomenclature
  25. 25Identify the reagent used in following conversion. Pent -3 -enenitrile pent -3 - enal23 Sep, 2021 (E)Method of preparation for Aldehydes
  26. 26What is the formal charge on ' ' atom in ion?23 Sep, 2021 (E)Ionic bond
  27. 27Identify most stable free radical from following.23 Sep, 2021 (E)Electron displacement effects
  28. 28Which among the following salt solution in water shows less than 7 ?23 Sep, 2021 (E)Salt Hydrolysis
  29. 29Ethoxy benzene on reaction with hot and concentrated forms23 Sep, 2021 (E)Reactions of Ethers
  30. 30What is vapour pressure of solution containing glucose in water?23 Sep, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  31. 31The rate law equation for a reaction between and is , what will be new rate of reaction if concentration of both A and B are doubled.23 Sep, 2021 (E)Rate law and rate constant
  32. 32Identify product in following conversion.23 Sep, 2021 (E)Preparation and Properties of Acid Derivatives
  33. 33Which of the following is NOT dihydric alcohol?23 Sep, 2021 (E)Classification of organic compounds
  34. 34Identify the sugar containing glycosidic linkage.23 Sep, 2021 (E)Disaccharides and Polysaccharides
  35. 35What is the freezing point of 1 molal aqueous solution of a non-volatile solute?23 Sep, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  36. 36How many particles per unit cell are present in BCC structure?23 Sep, 2021 (E)Cubic system
  37. 37Identify ferromagnetic element from following.23 Sep, 2021 (E)Electrical and Magnetic properties
  38. 38Two electrons occupying the same orbital are distinguished by23 Sep, 2021 (E)Quantum mechanical model
  39. 39Which of the following complexes is diamagnetic and square planar?23 Sep, 2021 (E)Werner's theory and Valence Bond Theory
  40. 40What is the mass of of methane gas at S.T.P.?23 Sep, 2021 (E)Mole concept
  41. 41An element with BCC structure has edge length of . If its density is , find atomic mass of the element?23 Sep, 2021 (E)Cubic system
  42. 42Identify the reagent (A) used in the following reaction.23 Sep, 2021 (E)Preparation and Properties of Amines
  43. 43What is the product formed when side chain chlorination of toluene is carried out followed by acid hydrolysis at ?23 Sep, 2021 (E)Method of preparation for both aldehydes and ketones
  44. 44A system given out of heat and does of work on it's surrounding. What is the internal energy change?23 Sep, 2021 (E)First Law and Basic Fundamentals of Thermodynamics
  45. 45Which of following reactions yields biphenyl from chlorobenzene?23 Sep, 2021 (E)Properties and Preparation of Alkanes
  46. 46A system does of work on surrounding by absorbing heat. What is the change in internal energy of the system?23 Sep, 2021 (E)First Law and Basic Fundamentals of Thermodynamics
  47. 47How many electrons flow through the wire if a current of 1.5 ampere flow through it for 3 hours?23 Sep, 2021 (E)Cells and Electrode Potential, Nernst Equation
  48. 48The conductivity of solution of at is . What is its molar conductivity?23 Sep, 2021 (E)Conductance and Conductivity
  49. 49The solubility of is at . What is it's solubility product?23 Sep, 2021 (E)Solubility
  50. 50The energy of an electron in the excited hydrogen atom is . Then according to Bohr's theory, the angular momentum of the electron in that ex23 Sep, 2021 (E)Hydrogen spectrum

Mathematics

  1. 1If , then the value of at is23 Sep, 2021 (E)Differentiation of composite functions
  2. 2Rooms in a hotel are numbered from 1 to 19 . Rooms are allocated at random as guests arrive. The first guest to arrive is given a room which23 Sep, 2021 (E)Classical Definition of Probability
  3. 3If a circle passes through the points , then the coordinates of its centre are23 Sep, 2021 (E)Locus
  4. 4If and such that , then the value of23 Sep, 2021 (E)Formation and Basic of Matrix
  5. 5If and is perpendicular to , then23 Sep, 2021 (E)Product of 2 vectors
  6. 6Negation of the statement : and is23 Sep, 2021 (E)Mathematical Reasoning
  7. 7If two lines represented by makes angles and with positive direction of -axis, then23 Sep, 2021 (E)homogeneous equation of second degree
  8. 8If , then23 Sep, 2021 (E)Differentiation of composite functions
  9. 9If , then the value of is23 Sep, 2021 (E)Solving Trigonometric Equation
  10. 10The general solution of the differential equation is23 Sep, 2021 (E)Variable Separable Form
  11. 11The area bounded by the parabola and its latus-rectum is23 Sep, 2021 (E)Area bounded by Miscellaneous Curves
  12. 12The vector equation of the line passing through and is23 Sep, 2021 (E)Line in Space
  13. 13Range of the function is23 Sep, 2021 (E)Range
  14. 14The coordinates of the foot of the perpendicular drawn from the origin to the plane are23 Sep, 2021 (E)Plane in Space
  15. 15The combined equation of a pair of lines passing through the origin and inclined at and respectively with -axis is23 Sep, 2021 (E)homogeneous equation of second degree
  16. 16If and , then23 Sep, 2021 (E)Parametric differentiation
  17. 17Preview not available - open to view this question.23 Sep, 2021 (E)Integration by Substitution
  18. 18Out of 7 consonants and 4 vowels, the number of words consisting of 3 consonants and 2 vowels are23 Sep, 2021 (E)Combination
  19. 19If iy satisfies the condition , then lies on the23 Sep, 2021 (E)Locus Based on Distance Formula
  20. 20Equation of planes parallel to the plane which are at a distance of one unit from the point are23 Sep, 2021 (E)Plane in Space
  21. 21If and are the position vectors of the vertices , respectively of , then the position vector of the point in which the bisector of meets is23 Sep, 2021 (E)Algebra of Vectors
  22. 2210 is divided into two parts such that the sum of double of the first and square of the other is minimum, then the numbers are respectively23 Sep, 2021 (E)Maxima Minima
  23. 23In a triangle , with usual notations , then23 Sep, 2021 (E)Cosine Rule and Projection Formula
  24. 24If , for is continuous at , then the value of is23 Sep, 2021 (E)Continuity
  25. 25Given that total of 16 values is 528 and sum of the squares of deviation from 33 is 9158 . The variance is23 Sep, 2021 (E)Measures of Dispersion
  26. 26The general solution of the differential equation is23 Sep, 2021 (E)Variable Separable Form
  27. 27If â is a unit vector such that , then23 Sep, 2021 (E)Product of 2 vectors
  28. 28The equation of line, where length of the perpendicular segment from origin to the line is 4 and the inclination of this perpendicular segme23 Sep, 2021 (E)Basic Forms of Straight Line
  29. 29If , then the value of and are respectively (where is a constant of integration)23 Sep, 2021 (E)Fundamental of Indefinite Integration
  30. 30The probability distribution of the number of doublets in four throws of a pair of dice is given by23 Sep, 2021 (E)Bernoulli Trial and Binomial Distribution
  31. 31Let and . If is a unit vector, then the maximum value of the scalar triple product is23 Sep, 2021 (E)Scalar Triple Product
  32. 32If -7 is an integer, the is a complex number is not an integer or is a complex number23 Sep, 2021 (E)Mathematical Reasoning
  33. 33For the probability distribution given by following {array}{|l|l|l|l|l|l|l|l|} {X} & 5 & 6 & 7 & 8 & 9 & 10 & 11 \\ {P}( {X}= {x}) & 0.07 & 23 Sep, 2021 (E)Random Variable and its Probability Distribution
  34. 34Preview not available - open to view this question.23 Sep, 2021 (E)Properties of Definite Integration
  35. 35Function is strictly increasing for all where23 Sep, 2021 (E)Monotonicity
  36. 36The distance between the parallel lines and is23 Sep, 2021 (E)Line in Space
  37. 37The general solution of the differential equation is23 Sep, 2021 (E)Variable Separable Form
  38. 38Preview not available - open to view this question.23 Sep, 2021 (E)Sum and difference of angles
  39. 39If and are the vertices of a parallelogram, then the area of the parallelogram is23 Sep, 2021 (E)Product of 2 vectors
  40. 40If and , then23 Sep, 2021 (E)Basic
  41. 41The maximum value of the objective function subject to the constraints and is23 Sep, 2021 (E)Linear Programming
  42. 42The particular solution of differential equation at is23 Sep, 2021 (E)Variable Separable Form
  43. 43Preview not available - open to view this question.23 Sep, 2021 (E)Integration by Substitution
  44. 44Preview not available - open to view this question.23 Sep, 2021 (E)Integration by Substitution
  45. 45If and , then is23 Sep, 2021 (E)Inverse of a Matrix
  46. 46If , then23 Sep, 2021 (E)Adjoint and its Properties
  47. 47Preview not available - open to view this question.23 Sep, 2021 (E)Algebraic and Rational Limits
  48. 48A random variable has the following probability distribution {array}{|r|l|l|l|l|l|l|l|l|l|} {x} & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\ {P}( 23 Sep, 2021 (E)Random Variable and its Probability Distribution
  49. 49If the surrounding air is kept at and a body cools from to in 30 minutes, then temperature of the body after one hour will be23 Sep, 2021 (E)Applications of DE
  50. 50If and are the extreme points of , then23 Sep, 2021 (E)Maxima Minima

Physics

  1. 1A thin ring of radius ' ' meter has charge ' ' coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of 23 Sep, 2021 (E)Magnetic Field
  2. 2Which one of the following statements is wrong for an isobaric process?23 Sep, 2021 (E)Thermodynamic Processes
  3. 3The radius of planet is twice the radius of the earth. Both have almost equal average mass densities. If ' ' and ' ' are escape velocities o23 Sep, 2021 (E)Gravitational potential and Potential Energy
  4. 4For a perfectly black body, coefficient of emission is23 Sep, 2021 (E)Radiation
  5. 5The shortest wavelength for Lyman series is . The longest wavelength in Paschen series is23 Sep, 2021 (E)Atomic Spectrum
  6. 6Two rods of different metals have coefficients of linear expansion ' ' and ' ' respectively. Their respective lengths are ' ' and ' '. At al23 Sep, 2021 (E)Thermal Expansion
  7. 7A balanced bridge is shown in the circuit diagram. The metre bridge wire has resistance . The current drawn from the battery is (Internal re23 Sep, 2021 (E)Wheatstone Bridge
  8. 8The temperature of a black body is increased by , then the percentage increase in the rate of radiation by the body is approximated23 Sep, 2021 (E)Radiation
  9. 9A particle executing S.H.M starts from the mean position. Its amplitude is ' ' and time period ' ' At what displacement its speed is one-fou23 Sep, 2021 (E)Simple Harmonic Motion
  10. 10The fundamental frequency of an air column in pipe ' ' closed at one end coincides with second overtone of pipe ' ' open at both ends. The r23 Sep, 2021 (E)Organ Pipe (Vibration of Air Column)
  11. 11An electron is projected along the axis of circular conductor carrying current ' ' The electron will experience23 Sep, 2021 (E)Motion of Charged Particle in Magnetic Field
  12. 12The mass of a spherical planet is 4 times the mass of the earth, but its radius (R) is same as that of the earth. How much work is done in l23 Sep, 2021 (E)Gravitational potential and Potential Energy
  13. 13A charged spherical conductor has radius ' '. The potential difference between its surface and a point at a distance ' ' from the center is 23 Sep, 2021 (E)Electric Potential and Potential Energy
  14. 14In YDSE experiment, the dark band is formed opposite to one of the slits. The wavelength of light used is distance between the slits, distan23 Sep, 2021 (E)Youngs Double Slit Experiment
  15. 15The magnitude of flux linked with coil varies with time as . The magnitude of induced e.m.f. at is23 Sep, 2021 (E)Magnetic Flux, Faraday's and Lenz law
  16. 16At what rate a single conductor should cut the magnetic flux so that current of flows through it when a resistance of is connected across it23 Sep, 2021 (E)Magnetic Flux, Faraday's and Lenz law
  17. 17If we increase the frequency of an a.c. supply, then inductive reactance23 Sep, 2021 (E)Alternating Current, Voltage and Power
  18. 18An electron of mass ' ' and a photon have same energy ' '. The ratio of de-Broglie wavelength of electron to the wavelength of photon is vel23 Sep, 2021 (E)Matter Waves
  19. 19Two parallel plates with dielectric placed between the plates are as shown in figure. The resultant capacity of capacitor will [A = area of 23 Sep, 2021 (E)Capacitors with Dielectric
  20. 20A bar magnet has length , cross-sectional area and magnetic moment . The intensity of magnetization of bar magnet is23 Sep, 2021 (E)Magnetism and Properties of Magnet
  21. 21If m' represents the mass of each molecules of a gas and ' its absolute temperature, then the root mean square speed of the gas molecule is 23 Sep, 2021 (E)Speed of Gas
  22. 22Figure shows triangular lamina which can rotate about different axes. Moment of inertia is maximum, about the axis23 Sep, 2021 (E)Moment of inertia of rigid bodies
  23. 23Water rises to a height of in a capillary tube. If crosssectional area of the tube is reduced to of initial area, then water will rise to a 23 Sep, 2021 (E)Surface tension
  24. 24For series LCR circuit, which one of the following is a CORRECT statement?23 Sep, 2021 (E)AC Circuits
  25. 25Two waves and are propagating in same direction. The number of beats produced per second are23 Sep, 2021 (E)Beats
  26. 26In an LCR series a.c. circuit, the voltage across each of the components and is . The voltage across the combination is23 Sep, 2021 (E)AC Circuits
  27. 27A student is throwing balls vertically upwards such that he throws the ball when the ball reaches maximum height. If he throws balls at an i23 Sep, 2021 (E)Uniform Motion
  28. 28The speed of a ball of radius in a viscous liquid is . What will be the speed of a ball of radius in same liquid?23 Sep, 2021 (E)Viscosity
  29. 29Work done in increasing the size of a soap bubble from radius of to in millijoule is nearly (surface tension of soap solution )23 Sep, 2021 (E)Surface tension
  30. 30In hydrogen atom an electron revolves around a proton (in nucleus) at a distance ' ' . the intensity of electric field due to the proton at 23 Sep, 2021 (E)Electric Potential and Potential Energy
  31. 31What are the values of the currents flowing in each of the following diode circuits and respectively? (Assume that the diodes are ideal)23 Sep, 2021 (E)Diodes
  32. 32In YDSE, the distance of the slits from the screen is increased by and the separation between the slits is halved. If ' ' represents the ori23 Sep, 2021 (E)Youngs Double Slit Experiment
  33. 33A molecule consists of two atoms each of mass ' ' and separated by a distance ' '. At room temperature, if the average rotational kinetic en23 Sep, 2021 (E)Rotational kinematics
  34. 34The magnifying power of a refracting type of astronomical telescope is ' '. If focal length of eyepiece is doubled then the magnifying power23 Sep, 2021 (E)Optical Instruments
  35. 35Two waves are represented by the equation, and , where is in metre and is in second. What is the phase difference between them?23 Sep, 2021 (E)Travelling Waves
  36. 36An ideal gas at pressure ' ' is adiabatically compressed so that its density becomes twice that of the initial. If , then final pressure of 23 Sep, 2021 (E)Thermodynamic Processes
  37. 37A wooden block of mass ' ' moves with velocity ' ' and collides with another block of mass ' ', which is at rest. After collision the block 23 Sep, 2021 (E)Collisions
  38. 38Two charge metallic spheres are joined by a very thin metal wire. If the radius of the larger sphere is four times that of the smaller spher23 Sep, 2021 (E)Electric Field and Electric Field Lines
  39. 39In common emitter amplifier, a change of in the base current causes a change of in the collector current. If input resistance is and voltage23 Sep, 2021 (E)Junction Transistors
  40. 40A particle performing S.H.M. when displacement is ' ', the potential energy and restoring force acting on it are denoted by ' ' and ' ' resp23 Sep, 2021 (E)Energy of Simple Harmonic Motion
  41. 41The Boolean equation for the circuit given in the figure is23 Sep, 2021 (E)Logic gates
  42. 42In young's experiment with a monochromatic source and two slits, one of the slits is covered with black opaque paper, the fringes will23 Sep, 2021 (E)Youngs Double Slit Experiment
  43. 43A ray of light travels from air to water to glass and again from glass to air. Refractive index of water w.r.t. air is ' ', glass w.r.t. wat23 Sep, 2021 (E)Refraction of light from plane surface
  44. 44In the Bohr model, an electron moves in a circular orbit around the nucleus. Considering an orbiting electron to be a circular current loop,23 Sep, 2021 (E)Magnetic Moment
  45. 45In potentiometer experiment, cells of e.m.f. ' ' and ' ' are connected in series the balancing length is of the wire. If the polarity of is 23 Sep, 2021 (E)Electric Instruments
  46. 46Three solid spheres each of mass ' ' and radius ' ' are arranged as shown in the figure. The moment of inertia of the system about YY' will 23 Sep, 2021 (E)Moment of inertia of rigid bodies
  47. 47A body is performing S.H.M. of amplitude 'A'. The displacement of the body from a point where kinetic energy is maximum to a point where pot23 Sep, 2021 (E)Energy of Simple Harmonic Motion
  48. 48Eddy currents are produced when23 Sep, 2021 (E)Electric Current and Drift of Electrons
  49. 49The resultant gate and its Boolean expression in the given circuit is23 Sep, 2021 (E)Logic gates
  50. 50When wavelength of incident radiation on the metal surface is reduced from ' ' to ' ' the kinetic energy of emitted photoelectrons is triple23 Sep, 2021 (E)Photoelectric Effect

Frequently Asked Questions

1.How many questions are in the MHTCET 2021 23rd September Evening Shift paper?

This paper has 150 questions in total - 50 each from Chemistry, Mathematics, and 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 evening shift?

MHTCET uses different question sets across shifts and sessions to maintain exam integrity, so this page reflects the specific paper administered in the 23rd September 2021 evening shift.

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

The MHTCET 2021 23rd September Morning Shift paper is listed separately - you can switch to it from the "MHTCET Paper Wise PYQs" panel, under MHTCET 23rd September 2021.

5.What is the structure of the MHTCET 2021 23rd September Evening Shift paper?

The MHTCET 2021 23rd September Evening Shift paper on MARKS has 150 questions, organised by subject:

  • Chemistry: 50 questions - 50 single-correct.
  • Mathematics: 50 questions - 50 single-correct.
  • Physics: 50 questions - 50 single-correct.
6.What is the difficulty level of the MHTCET 2021 23rd September Evening Shift paper?

Each question on MARKS carries a difficulty rating. Of the 150 rated questions in this paper, 50 (33%) are easy, 78 (52%) are medium and 22 (15%) are hard. Subject wise:

  • Chemistry: 17 easy, 28 medium, 5 hard
  • Mathematics: 14 easy, 29 medium, 7 hard
  • Physics: 19 easy, 21 medium, 10 hard
7.Which chapters had the most questions in the MHTCET 2021 23rd September Evening Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: General Organic Chemistry (5), Solid State (4), and Chemical Bonding and Molecular Structure (3).
  • Mathematics: Differential Equations (5), Vector Algebra (5), and Indefinite Integration (4).
  • Physics: Semiconductors (4), Alternating Current (3), and Current Electricity (3).
8.Where can I find the solutions for the MHTCET 2021 23rd September Evening 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 MHTCET 2021 23rd September Evening Shift paper to check my preparation?

Set a timer, attempt the 150 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 MHTCET. Repeating this with other papers shows whether the same weak spots keep coming back.

10.Will the MHTCET 2021 23rd September Evening Shift paper help me prepare for MHTCET 2027?

Yes. Every past paper shows the question styles and topics MHTCET 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.