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MHTCET 2021 21st September Evening Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the MHTCET 2021 21st 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 - 74 easy (49%), 66 moderate (44%) and 10 tough (7%). That's an easier-than-usual mix for this exam - aim to clear it quickly and save time for the harder papers. By subject: Physics 58% easy, 34% moderate, 8% tough; Chemistry 34% easy, 60% moderate, 6% tough; Mathematics 56% easy, 38% moderate, 6% tough.

Chemistry questions were spread across 24 chapters, with Hydrocarbons (7), Chemical Kinetics (4), and Solid State (4) carrying the most weight. Mathematics questions were spread across 24 chapters, with Three Dimensional Geometry (6), Differential Equations (5), and Vector Algebra (4) carrying the most weight. Physics questions were spread across 22 chapters, with Alternating Current (4), Mechanical Properties of Fluids (4), and Waves and Sound (4) carrying the most weight.

Chemistry

  1. 1Which of following elements form crosslinks in vulcanization of SBR rubber?21 Sep, 2021 (E)Preparation and Properties of Polymers
  2. 2Identify the name of following reaction. Toluene + chromyl chloride complex Benzaldehyde21 Sep, 2021 (E)Reactions of aromatic compounds
  3. 3Identify the product formed when benzoyl chloride is reduced by hydrogen using palladium catalyst poisoned with barium sulphate?21 Sep, 2021 (E)Method of preparation for Aldehydes
  4. 4Which among the following statement is true for Galvanic cell?21 Sep, 2021 (E)Commercial Cells and Batteries
  5. 5What is the value of for the formation of 2 moles of ammonia from and ?21 Sep, 2021 (E)Laws of Thermochemistry and Enthalpy Change
  6. 6What is the rate of disappearance of B in following reaction? , if rate of appearance of is .21 Sep, 2021 (E)Rate of reaction
  7. 7What is vapour pressure of a solution when of a non-volatile solute are dissolved in of water?21 Sep, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  8. 8Which of the following reactions is a Wurtz - Fittig reaction?21 Sep, 2021 (E)Preparation and Properties of Aryl Halides
  9. 9Which isomer of has highest boiling point?21 Sep, 2021 (E)Properties and Preparation of Alkanes
  10. 10What is the volume occupied by methane gas at STP?21 Sep, 2021 (E)Mole concept
  11. 11What is the percentage of unoccupied volume in BCC structure?21 Sep, 2021 (E)Cubic system
  12. 12Identify the product formed when tertiary butyl bromide reacts with alcoholic solution?21 Sep, 2021 (E)Properties and Preparation of Alkenes
  13. 13Which of following enzymes is useful in conversion of glucose to fructose?21 Sep, 2021 (E)Preparation and Reactions of Glucose
  14. 14For a first order reaction, intercept of the graph between -axis) and time. (X-axis) is equal to21 Sep, 2021 (E)Integrated rate laws
  15. 15What is the number of moles of electrons passed when current of 5 ampere is passed through a solution of for 20 minutes?21 Sep, 2021 (E)Cells and Electrode Potential, Nernst Equation
  16. 16What is the total number of atoms in BCC crystal lattice having unit cells?21 Sep, 2021 (E)Cubic system
  17. 17Which property from following is NOT exhibited by interstitial compound?21 Sep, 2021 (E)Properties of D-block elements
  18. 18Which free radical initiator is used for polymerization of tetrafluoro ethylene?21 Sep, 2021 (E)Classification of Polymers
  19. 19Which of the following is NOT formed when a mixture of methyl bromide and n-propyl bromide is treated with sodium metal in dry ether?21 Sep, 2021 (E)Properties and Preparation of Alkanes
  20. 20What is effective atomic number of cobalt in if21 Sep, 2021 (E)Terminology of coordination compounds
  21. 21Which from following statements is NOT correct for heterolysis?21 Sep, 2021 (E)Bond Cleavage
  22. 22When 1 mole of gas is heated at constant volume, the temperature rises form to . If heat supplied to the gas is , then find the correct stat21 Sep, 2021 (E)First Law and Basic Fundamentals of Thermodynamics
  23. 23What will be the concentration of solution of electrolyte if it's molar conductivity and conductivity are respectively and at ?21 Sep, 2021 (E)Conductance and Conductivity
  24. 24What is the half-life of a first order reaction if time required to decrease concentration of reactant from to is 10 hours?21 Sep, 2021 (E)Integrated rate laws
  25. 25Identify the product formed in the following reaction.21 Sep, 2021 (E)Integrated rate laws
  26. 26What is the density of an element (At. mass ) having BCC structure with edge length ?21 Sep, 2021 (E)Cubic system
  27. 27Which reagent oxidizes glucose to saccharic acid?21 Sep, 2021 (E)Preparation and Reactions of Glucose
  28. 28Which among following amines has lowest values?21 Sep, 2021 (E)Electron displacement effects
  29. 29Which among the following noble gases reacts with fluorine to given crystalline fluorides?21 Sep, 2021 (E)Noble Gases
  30. 30What is the wavelength for a wave having frequency ?21 Sep, 2021 (E)Hydrogen spectrum
  31. 31The in a solution is . What is the concentration of ions?21 Sep, 2021 (E)Ionic Product of Water
  32. 32What type of isomers are the ethoxy ethane and methoxy propane?21 Sep, 2021 (E)Isomerism of Organic Compounds
  33. 33Which among the following gases is adsorbed to greater extent at similar conditions of temperature and pressure if the adsorbent remains sam21 Sep, 2021 (E)Critical phenomena and liquefaction
  34. 34Which of the following reagents is used in the reaction shown below? Benzoyl chloride Benzaldehyde21 Sep, 2021 (E)Method of preparation for Aldehydes
  35. 35The pH of is 9.95. Calculate the21 Sep, 2021 (E)PH of solutions
  36. 36What is the formal charge of oxygen atoms in carbon monoxide?21 Sep, 2021 (E)Ionic bond
  37. 37Identify the product B in the following sequence of reactions?21 Sep, 2021 (E)Properties and Preparation of Alkenes
  38. 38Which among the following salt solution in water shows greater than 7 ?21 Sep, 2021 (E)Salt Hydrolysis
  39. 39What is the boiling point of 0.5 molal aqueous solution of sucrose is 0.1 molal aqueous solution of glucose boils at21 Sep, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  40. 40Which element among the following is ferromagnetic?21 Sep, 2021 (E)Electrical and Magnetic properties
  41. 41Which among the following is NOT an example of one-dimensional nanostructure?21 Sep, 2021 (E)Nanostructures
  42. 42Which among the following molecules exhibits strong London forces?21 Sep, 2021 (E)Properties and Preparation of Alkanes
  43. 43Oxidation state of iodine in is21 Sep, 2021 (E)Oxidation number
  44. 44Identify cationic complex from following.21 Sep, 2021 (E)Terminology of coordination compounds
  45. 45Which among the following obtained as major product in the reaction stated below?21 Sep, 2021 (E)Reactions of Ethers
  46. 46Which of the following is NOT true for alkaline earth metals?21 Sep, 2021 (E)Alkaline Earth Metals
  47. 47In which of the following salts, the solubility increases appreciably with increase in temperature?21 Sep, 2021 (E)Properties of ionic compounds
  48. 48Two moles of an ideal gas are expanded isothermally from 15 to . If the amount of work done is bar, find external pressure needed to obtain 21 Sep, 2021 (E)First Law and Basic Fundamentals of Thermodynamics
  49. 49Chlorobenzene on heating with concentrated in presence of concentrated gives21 Sep, 2021 (E)Reactions of aromatic compounds
  50. 50Which among the following statements about ozone depletion is NOT true?21 Sep, 2021 (E)Air Pollution

Mathematics

  1. 1For all real , the minimum value of the function is21 Sep, 2021 (E)Maxima Minima
  2. 2The function is increasing on21 Sep, 2021 (E)Monotonicity
  3. 3If , then where iy21 Sep, 2021 (E)Algebra of complex numbers
  4. 4A bakerman sells 5 types of cakes. Profit due to sale of each type of cake is respectively Rs 2 , Rs 2.5 , Rs 3, Rs 1.5 and Rs 1 . The deman21 Sep, 2021 (E)Random Variable and its Probability Distribution
  5. 5If is the length of the perpendicular from origin to the whose intercepts on the axes are and , then21 Sep, 2021 (E)Basic Forms of Straight Line
  6. 6With usual notations, perimeter of a triangle is 6 times the arithmetic mean of since of its angles. If , then measure of angle21 Sep, 2021 (E)Sine Rule and its application
  7. 7If , then the acute angle between the lines represented by is21 Sep, 2021 (E)Angle between lines
  8. 8Preview not available - open to view this question.21 Sep, 2021 (E)Properties of Definite Integration
  9. 9If the half life period of a substance is 5 years, then the total amount of the substance left after 15 years, when initial amount is is21 Sep, 2021 (E)Applications of DE
  10. 10The area of the parallelogram with vertices , and is sq. units, then21 Sep, 2021 (E)Product of 2 vectors
  11. 11If and is perpendicular to , then21 Sep, 2021 (E)Product of 2 vectors
  12. 12If , then21 Sep, 2021 (E)Principal Value and Basics
  13. 13If and (where , then the value of is21 Sep, 2021 (E)Sum and Difference & Multiple angle Formula
  14. 14Preview not available - open to view this question.21 Sep, 2021 (E)Integration by Substitution
  15. 15The general solution of the differential equation.21 Sep, 2021 (E)Variable Separable Form
  16. 16Let and let be such that highest prime factor of , where , then range of21 Sep, 2021 (E)Range
  17. 17The mean of five observation is 4 and their variance is 5.2. If three of these observations are 1,2 and 6 , then the other two are21 Sep, 2021 (E)Measures of Dispersion
  18. 18If and , then the value of is21 Sep, 2021 (E)Product of 2 vectors
  19. 19If is order and is degree of the differential equation , then21 Sep, 2021 (E)Order and Degree
  20. 20Preview not available - open to view this question.21 Sep, 2021 (E)Integration by Substitution
  21. 21The objective function subjective to ; has minimum value at the point.21 Sep, 2021 (E)Linear Programming
  22. 22is continuous in the interval , then21 Sep, 2021 (E)Continuity
  23. 23The differential equation of the family of circles touching -axis at the origin is21 Sep, 2021 (E)Formation of Differential Equation
  24. 24An urn contains 9 balls of which 3 are red, 4 are blue and 2 are green. Three balls are drawn at random from the urn. The probability that t21 Sep, 2021 (E)Plane in Space
  25. 25The equation of the plane containing the line and the point is21 Sep, 2021 (E)Plane in Space
  26. 26The number of solutions of in are21 Sep, 2021 (E)Basic Identities & T Ratios
  27. 27If , then the value of , where is21 Sep, 2021 (E)Algebraic and Rational Limits
  28. 28The equations of a line passing through and perpendicular to the lines and is21 Sep, 2021 (E)Line in Space
  29. 29S1: Differential equations given by I and II are homogeneous differential equations. S2: Differential equations given by II and III are homo21 Sep, 2021 (E)Homogeneous DE
  30. 30The direction cosines of the line21 Sep, 2021 (E)Direction Cosines and Direction Ratios
  31. 31Preview not available - open to view this question.21 Sep, 2021 (E)Properties of Definite Integration
  32. 32If , then21 Sep, 2021 (E)Differentiation of Inverse Trigonometric Functions
  33. 33If and , then the values of , are respectively21 Sep, 2021 (E)Higher order derivatives
  34. 34and , then values of and are respectively21 Sep, 2021 (E)Inverse of a Matrix
  35. 35For , if , then21 Sep, 2021 (E)Measures of Dispersion
  36. 36If , then21 Sep, 2021 (E)Differentiation of Inverse Trigonometric Functions
  37. 37The co-ordinates of the and , then the direction cosines of are21 Sep, 2021 (E)Direction Cosines and Direction Ratios
  38. 38If , then (Where is constant of integration)21 Sep, 2021 (E)Miscellaneous Forms
  39. 39The equation of circle with centre at and the circumference units is21 Sep, 2021 (E)Equation of Circle & its intercept
  40. 40Equation of the plane passing through the point and parallel to the vectors and is21 Sep, 2021 (E)Plane in Space
  41. 41If is observed that of the cases related to child labour reported to the police station are solved. If 6 new cases are reported, then the pr21 Sep, 2021 (E)Bernoulli Trial and Binomial Distribution
  42. 42If , then21 Sep, 2021 (E)Adjoint and its Properties
  43. 43For a set of five true or false questions, no student has written the all correct answers and no two students have given the same sequence o21 Sep, 2021 (E)Combination
  44. 44If and , then21 Sep, 2021 (E)Product of 2 vectors
  45. 45If , then21 Sep, 2021 (E)Inverse of a Matrix
  46. 46The area bounded by the parabola , the straight line and axis is21 Sep, 2021 (E)Area bounded by two curves
  47. 47If the lines make angles and with positive direction of X-axis, then21 Sep, 2021 (E)Pair of lines through origin
  48. 48The abscissa of the points, where the tangent to the curve is parallel to -axis are21 Sep, 2021 (E)Tangent Normal
  49. 49The logical statement is equivalent to21 Sep, 2021 (E)Mathematical Reasoning
  50. 50If is false, then the truth values of and are, respectively21 Sep, 2021 (E)Mathematical Reasoning

Physics

  1. 1Under isothermal conditions, two soap bubbles of radii ' ' and ' ' combine to forms a single soap bubble of radius ' '. The surface tension 21 Sep, 2021 (E)Surface tension
  2. 2A molecule of mass ' ' moving with velocity ' ' makes 5 elastic collisions with a wall of container per second. The change in momentum of th21 Sep, 2021 (E)Collisions
  3. 3Photoemission from metal surface take place for frequencies ' ' and ' ' of incident rays. If ratio of maximum kinetic energy of photoelectro21 Sep, 2021 (E)Photoelectric Effect
  4. 4Combination of NAND gates is shown in the figure. It is equivalent to which gate:21 Sep, 2021 (E)Logic gates
  5. 5The inductive reactance of coil is . If the inductance of a coil is doubled and frequency of a.c. supply is also doubled then then new induc21 Sep, 2021 (E)Alternating Current, Voltage and Power
  6. 6If ' ' is the kinetic energy per mole of an ideal gas and ' ' is the absolute temperature, then the universal gas constant is given as21 Sep, 2021 (E)Pressure and Energy of gas
  7. 7Two coherent sources ' ' and ' ' produce interference at point ' ' on the screen, where there is a dark band which is formed between and bri21 Sep, 2021 (E)Interference of Light
  8. 8Equal volumes of two gases are kept in different containers having densities in the ratio . They exert equal pressures on the wall of their 21 Sep, 2021 (E)Pressure and Energy of gas
  9. 9A body at rest falls through a height ' ' with velocity ' '. If it has to fall down further for its velocity to become three times, the dist21 Sep, 2021 (E)Motion Under Gravity
  10. 10A hollow metal sphere has a radius ' '. The potential difference between a point on its surface and at a point at a distance ' ' from its ce21 Sep, 2021 (E)Electric Potential and Potential Energy
  11. 11Water rises to a height in a capillary tube. It will rise to a height which is much more than in a very long capillary tube if the apparatus21 Sep, 2021 (E)Surface tension
  12. 12In an ideal junction diode, the current flowing through is (resistance is 2 kilo-ohms)21 Sep, 2021 (E)Diodes
  13. 13A pendulum clock is running fast. To correct its time, we should21 Sep, 2021 (E)Time Period and Frequency
  14. 14and are three parallel conductors of equal lengths carrying currents I, I and 2I respectively. Distance between A and is ' ' and that betwee21 Sep, 2021 (E)Force and Torque on Current Carrying Conductor
  15. 15A particle is performing S.H.M. with maximum velocity ' '. If the amplitude is tripled and periodic time is doubled then maximum velocity wi21 Sep, 2021 (E)Simple Harmonic Motion
  16. 16Two coherent sources of wavelength ' ' produce steady interference pattern. The path difference corresponding to order maximum will be21 Sep, 2021 (E)Interference of Light
  17. 17When a piece of polythene is rubbed with wool, a negative charge of is developed on the polythene. The number of electrons transferred wool 21 Sep, 2021 (E)Electric Charge and Coulomb's law
  18. 18A proton and alpha particle are accelerated through the same potential difference. The ratio of the de-Broglie wavelength of proton to that 21 Sep, 2021 (E)Matter Waves
  19. 19A particle performs rotational motion with an angular momentum ' '. if frequency of rotation is doubled and its kinetic energy becomes one f21 Sep, 2021 (E)Angular momentum and Angular impulse
  20. 20The wave number of the last line of the Balmer series in the hydrogen spectrum will be (Rydberg'sconstnat,21 Sep, 2021 (E)Atomic Spectrum
  21. 21In a step up transformer, which one of the following statements is correct?21 Sep, 2021 (E)Transformers
  22. 22Two identical parallel plate air capacitors are connected in series to a battery of emf ' '. If one of the capacitor is inserted in liquid o21 Sep, 2021 (E)Capacitors with Dielectric
  23. 23In thermodynamics, for an isochoric process, which one of the following statement is INCORRECT?21 Sep, 2021 (E)Thermodynamic Processes
  24. 24The angel of banking ' ' for a meter gauge railway line is . What is the elevation of the outer rail above the inner rail?21 Sep, 2021 (E)Non-uniform Circular Motion
  25. 25For a body of mas ' ', the acceleration due to gravity at a distance ' ' from the surface of the earth is . Its value at a distance from the21 Sep, 2021 (E)Acceleration Due to Gravity
  26. 26A child is sitting on a swing which performs S.H.M. It has minimum and maximum heights from ground and respectively. Its maximum speed will 21 Sep, 2021 (E)Energy of Simple Harmonic Motion
  27. 27The equation of simple harmonic wave produced in the string under tension is given by . The mass per unit length of the string is21 Sep, 2021 (E)Basics of Mechanical Waves
  28. 28In Young's experiment, fringes are obtained on a screen placed a distance from the slits. When the separation between two narrow slits is do21 Sep, 2021 (E)Youngs Double Slit Experiment
  29. 29A convex lens is dipped in a liquid whose refractive index is equal to refractive index of lens material. Then its focal length will21 Sep, 2021 (E)Lens Formula, Refraction of light from curved surface
  30. 30The magnetic flux near the axis and inside the air core solenoid of length carrying current ' ' is . Its magnetic moment will be , SI unit a21 Sep, 2021 (E)Magnetic Flux, Faraday's and Lenz law
  31. 31A moving coil galvanometer is converted into an ammeter, reading up to by connecting a shunt of resistance ' ' across it and then into an am21 Sep, 2021 (E)Electric Instruments
  32. 32LED is manufacture using zinc selenide then it emits.21 Sep, 2021 (E)Special purpose diodes
  33. 33A pipe closed at one end has length . At its open end long uniform string is vibrating in its harmonic and it resonates with the fundamental21 Sep, 2021 (E)Organ Pipe (Vibration of Air Column)
  34. 34Three bodies P, Q and R have masses ' ' , ' ' and ' ' respectively. If all the bodies have equal kinetic energy, then greater momentum will 21 Sep, 2021 (E)Newton's laws of motion
  35. 35The pure inductors each of inductance are connected as shown in the figure. Their equivalent inductance between the points ' ' and ' ' is21 Sep, 2021 (E)Inductance
  36. 36A big water drop is divided into 8 equal droplets. and be the excess pressure inside a smaller and bigger drop respectively. The relation be21 Sep, 2021 (E)Surface tension
  37. 37Ratio of centripetal acceleration for an electron revolving in and Bohr orbit of hydrogen atom is21 Sep, 2021 (E)Bohr's Atomic Model
  38. 38Two rods of same length and material are joined end to end. They transfer heat in 8 second. When they are joined in parallel they transfer s21 Sep, 2021 (E)Conduction
  39. 39Equation of two simple harmonic waves is given by and then both waves have21 Sep, 2021 (E)Basics of Mechanical Waves
  40. 40The refractive index of glass is 1.5 and that of water is 1.33 . The critical angle for a ray of light going from glass to water is21 Sep, 2021 (E)Critical angle and total internal reflection
  41. 41Magnetic moment of revolving electron of charge (e) and mass (m) in terms of angular momentum (L) of electron is21 Sep, 2021 (E)Magnetic Moment
  42. 42In LCR series resonant circuit, at resonance, voltage across ' ' and ' ' will cancel each other because they are21 Sep, 2021 (E)AC Circuits
  43. 43The ratio of energy required to raise a satellite of mass ' ' to height ' ' above the earth's surface to that required to put it into the or21 Sep, 2021 (E)Motion of satellite
  44. 44Three rings each of mass ' ' and radius ' ' are arranged as shown in the figure. The moment of inertia of system about axis YY' will be21 Sep, 2021 (E)Moment of inertia of rigid bodies
  45. 45What is the ratio of the velocity of sound in hydrogen to that in helium at the same temperature? (Molecular weight of hydrogen and helium i21 Sep, 2021 (E)Speed of Sound Waves
  46. 46The north pole of a long horizontal bar magnet is being brought towards closed circuit consisting of a coil. The direction of induced curren21 Sep, 2021 (E)Magnetic Flux, Faraday's and Lenz law
  47. 47A condenser of capacity ' ' is charged to potential ' ' and then disconnected. Uncharged capacitor of capacity ' ' is connected in parallel 21 Sep, 2021 (E)Charging and Discarging of capacitors
  48. 48The instantaneous value of an alternating current is given by . It will achieve a value of after a time interval of21 Sep, 2021 (E)Alternating Current, Voltage and Power
  49. 49In capillary tube having area of cross-section ' ', water rises to a height ' '. If cross sectional area is reduced to , the rise of water i21 Sep, 2021 (E)Surface tension
  50. 50The current through resistance in the following circuit is21 Sep, 2021 (E)Wheatstone Bridge

Frequently Asked Questions

1.How many questions are in the MHTCET 2021 21st 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 21st September 2021 evening shift.

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

The MHTCET 2021 21st September Morning Shift paper is listed separately - you can switch to it from the "MHTCET Paper Wise PYQs" panel, under MHTCET 21st September 2021.

5.What is the structure of the MHTCET 2021 21st September Evening Shift paper?

The MHTCET 2021 21st 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 21st September Evening Shift paper?

Each question on MARKS carries a difficulty rating. Of the 150 rated questions in this paper, 74 (49%) are easy, 66 (44%) are medium and 10 (7%) are hard. Subject wise:

  • Chemistry: 17 easy, 30 medium, 3 hard
  • Mathematics: 28 easy, 19 medium, 3 hard
  • Physics: 29 easy, 17 medium, 4 hard
7.Which chapters had the most questions in the MHTCET 2021 21st September Evening Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: Hydrocarbons (7), Chemical Kinetics (4), and Solid State (4).
  • Mathematics: Three Dimensional Geometry (6), Differential Equations (5), and Vector Algebra (4).
  • Physics: Alternating Current (4), Mechanical Properties of Fluids (4), and Waves and Sound (4).
8.Where can I find the solutions for the MHTCET 2021 21st 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 21st 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 21st 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.