Jump to a section

COMEDK 2013

Browse the complete Chemistry, Mathematics, and Physics question set from the COMEDK 2013 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 180 questions in total - 105 easy (58%), 54 moderate (30%) and 21 tough (12%). 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 62% easy, 32% moderate, 7% tough; Chemistry 48% easy, 33% moderate, 18% tough; Mathematics 65% easy, 25% moderate, 10% tough.

Chemistry questions were spread across 28 chapters, with Chemical Kinetics (5), Biomolecules (4), and Aldehydes and Ketones (3) carrying the most weight. Mathematics questions were spread across 28 chapters, with Mathematical Reasoning (6), Application of Derivatives (4), and Circle (4) carrying the most weight. Physics questions were spread across 25 chapters, with Waves and Sound (6), Atomic Physics (4), and Wave Optics (4) carrying the most weight.

Chemistry

  1. 1A colourless crystalline salt is soluble in dilute . On adding solution, it gives a white precipitate which is insoluble in excess of is2013Compounds of Alkaline Earth Metals
  2. 2Which metal is used to make alloy steel for armour plates, safes and helmets ?2013Properties of D-block elements
  3. 3Iodoform test is not answered by2013Tests for aldehyde and ketones
  4. 4A gaseous carbon compound is soluble in dilute . The solution on treating with gives off nitrogen leaving behind a solution, which smells of2013Separation of mixture of amines
  5. 5Which of the following statements is incorrect regarding benzyl chloride?2013Preparation and Properties of Monohalides
  6. 6Enthalpy of formation of and are and respectively. Which of the following statements is incorrect?2013Laws of Thermochemistry and Enthalpy Change
  7. 7Heat liberated with of is neutralised by of2013Laws of Thermochemistry and Enthalpy Change
  8. 8For a reaction , if concentration of is doubled without altering that of , rate doubles. If concentration of is increased nine-times without2013Methods to determine order of reaction
  9. 9In Goldschmidt aluminothermic process, thermite contains2013Extraction of Metals
  10. 10The structure of orthophosphoric acid is2013Hybridisation and VSEPR Theory
  11. 11A galvanic cell is constructed using the redox reaction, it is represented as2013Cells and Electrode Potential, Nernst Equation
  12. 12Same amount of electric current is passed through solutions of and . If of silver is obtained in the first case, the amount of hydrogen libe2013Cells and Electrode Potential, Nernst Equation
  13. 13The flame colours of metal ions are due to2013Non-stoichiometric defects
  14. 14The order of reactivities of methyl halides in the formation of Grignard reagent is2013Preparation and Properties of Monohalides
  15. 15The reaction of an organic compound with ammonia followed by nitration of the product gives a powerful explosive, called RDX. The organic co2013Reactions of aromatic compounds
  16. 16A signature, written in carbon pencil weighs . What is the number of carbon atoms present in the signature?2013Mole concept
  17. 17and gas are introduced simultaneously from the two ends of a long tube. A white ring of appears first2013Mixture of gases
  18. 18A gas formed by the action of alcoholic on ethyl iodide, decolourises alkaline . The gas is2013Preparation and Properties of Monohalides
  19. 19Which of the following is not a characteristic of chemisorption?2013Adsorption
  20. 20The concentration of electrolyte required to coagulate a given amount of sol is minimum in the case of2013Properties of colloidal solution
  21. 21Identify the organic compound which, on heating with strong solution of , partly converted into an acid salt and partly into alcohol2013Chemical reactions for aldehydes and ketones
  22. 22The process by which synthesis of protein takes place based on the genetic information present in is called2013Nucleic Acids
  23. 23The enthalpies of formation of and are and respectively. for the reaction, is2013Laws of Thermochemistry and Enthalpy Change
  24. 24The gaseous reaction is most favoured at2013Le chatelier's principle
  25. 25Temperature coefficient of a reaction is . When temperature is increased from to , rate of the reaction increases by2013Arrhenius theory
  26. 26The volume of water to be added to to prepare of solution is2013Concentration terms
  27. 27The equivalent weight of a certain trivalent element is . Molecular weight of its oxide is2013Equivalence concept
  28. 28Identify the reaction that doesn't take place during the smelting process of copper extraction2013Extraction of Metals
  29. 29Pick out the complex compound in which the central metal atom obeys rule strictly.2013Terminology of coordination compounds
  30. 30In a reversible reaction, the catalyst2013Arrhenius theory
  31. 31Solubility product of a salt is in a solution in which concentration of is . The salt will precipitate when the concentration of becomes mor2013Solubility
  32. 32The standard reduction potentials of and in water at are, Which of the following reactions take place?2013Cells and Electrode Potential, Nernst Equation
  33. 33The ratio of cationic radius to anionic radius in an ionic crystal is greater than . Its coordination number is2013Cubic system
  34. 34Dacron is obtained by the condensation polymerisation of2013Preparation and Properties of Polymers
  35. 35chloro dimethyl phenol is called2013Drugs and It's Classification
  36. 36The percentage character of the hybrid orbitals in methane, ethene and ethyne are respectively2013Hybridisation and VSEPR Theory
  37. 37In the manufacture of sulphuric acid by contact process, Tyndall box is used to2013Sulphur and Its Compounds
  38. 38The value of gastric juice in human stomach is about and in the small intestine it is about . The value of aspirin is . Aspirin will be2013Drugs and It's Classification
  39. 39The number of and -particles emitted during the transformation of to are respectively2013Parallel and Sequencial rate laws
  40. 40When chlorine is passed through warm benzene in presence of the sunlight, the product obtained is2013Reactions of aromatic compounds
  41. 41Ethyl benzoate reacts with to give2013Preparation and Properties of Acid Derivatives
  42. 42Pick out the statement which is not relevant in the discussion of colloids2013Colloids
  43. 43A wooden box excavated from Indus valley had an activity of disintegration per minute per of carbon. What is the approximate age of this civ2013Rate law and rate constant
  44. 44For a reaction, if , the forward reaction is favoured by2013Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  45. 45In a lime kiln, to get higher yield of , the measure that can be taken is2013Le chatelier's principle
  46. 46What is the volume of ' volume ' required to get of oxygen at STP?2013Mole concept
  47. 47The IUPAC name of is2013IUPAC Nomenclature
  48. 48Railway wagon axles are made by heating iron rods embedded in charcoal powder. This process is known as2013Properties of S-block elements
  49. 49Thomas slag is2013Properties of S-block elements
  50. 50Urea is preferred to ammonium sulphate as a nitrogenous fertiliser because2013Nitrogen and Its Compounds
  51. 51Two gas cylinders having same capacity have been filled with of and of respectively. If the pressure in cylinder is atmosphere at a particul2013Mixture of gases
  52. 52Angular momentum of an electron in the th orbit of hydrogen atom is given by2013Quantum mechanical model
  53. 53The element with atomic number belongs to block in the periodic table.2013Modern periodic table
  54. 54The function of in Friedel-Craft's reaction is2013Reactions of aromatic compounds
  55. 55An important reaction of acetone is auto-condensation in presence of concentrated sulphuric acid to give the aromatic compound2013Chemical reactions for aldehydes and ketones
  56. 56Kinetic energy of one mole of an ideal gas at in is2013Kinetic theory of gases
  57. 57The tripeptide hormone present in most living cells is2013Proteins
  58. 58Preview not available - open to view this question.2013Reactions of Phenol
  59. 59Energy is stored in our body in the form of2013Nucleic Acids
  60. 60An organic compound answers Molisch's test as well as Benedict's test, but it does not answer Scliwanoff s test. Most probably, it is2013Disaccharides and Polysaccharides

Mathematics

  1. 1is logically equivalent to2013Mathematical Reasoning
  2. 2Which of the following is the inverse of the proposition : "If a number is a prime, then it is odd"?2013Mathematical Reasoning
  3. 3What must be the matrix if2013Basic Algebra of Matrices
  4. 4The value of is2013Expansion of Determinants
  5. 5The value of is2013Expansion of Determinants
  6. 6is equal to2013Product of 2 vectors
  7. 7Inverse of the matrix is2013Inverse of a Matrix
  8. 8If , then a value of for which is perpendicular to is2013Product of 2 vectors
  9. 9The projection of on is2013Product of 2 vectors
  10. 10In the group under multiplication is equal to2013Mathematical Reasoning
  11. 11The maximum of the function is2013Maxima Minima
  12. 12If the distance ' metres traversed by a particle in seconds is given by , then the velocity of the particle when the acceleration is zero, i2013Derivative of f(x) wrt g(x)
  13. 13For the curve if the subnormal at any point is a constant, then is equal to2013Tangent Normal
  14. 14If , then is equal to2013Derivative of f(x) wrt g(x)
  15. 15If tangent to the curve is perpendicular to -axis, then its point of contact is2013Tangent Normal
  16. 16The general solution of the differential equation is given by2013Variable Separable Form
  17. 17The degree of the differential equation is2013Order and Degree
  18. 18The area enclosed between the curves and is, (in square units)2013Area bounded by two curves
  19. 19is equal to2013Properties of Definite Integration
  20. 20is equal to2013Properties of Definite Integration
  21. 21If represents a pair of lines, then is equal to2013Concurrency & Family of Lines
  22. 22What is the equation of the locus of a point which moves such that times its distance from the -axis is the square of its distance from the 2013Heights and Distances
  23. 23Equation of the straight line making equal intercepts on the axes and passing through the point is2013Locus
  24. 24If the area of the triangle with vertices , and is sq units, then the value of is2013Expansion of Determinants
  25. 25Preview not available - open to view this question.2013Algebraic and Rational Limits
  26. 26The co-axial system of circles given by for represents2013General Equation of 2nd degree curve
  27. 27The radius of the circle passing through the point and two of whose diameters are and is2013General Equation of 2nd degree curve
  28. 28If and are respectively the vertex and focus of a parabola, then its equation is2013standard equation of parabola
  29. 29For the ellipse the eccentricity is equal to2013Equation of Ellipse
  30. 30If the foci of the ellipse and the hyperbola coincide then the value of is2013Equation of Ellipse
  31. 31The differential coefficient is with respect to where is2013Derivative of f(x) wrt g(x)
  32. 32If is continuous at , then the value of is2013Continuity
  33. 33If is2013Cube Root of Unity
  34. 34If , then is equal to2013T inverse T property
  35. 35If , then is equal to2013Relation between Roots and Coefficients
  36. 36is equal to2013Miscellaneous
  37. 37is equal to2013Integration by Substitution
  38. 38is equal to2013Integration by Parts
  39. 39is equal to2013Integration by Substitution
  40. 40If a tangent to the curve is parallel to the line , then the point of tangency on the curve is2013Tangent Normal
  41. 41is equal to2013Ratio and Proportion
  42. 42The number of solutions for the equation is2013Relation between Roots and Coefficients
  43. 43How many numbers of digits can be formed from the digits of the number ?2013Permutation
  44. 44The last digit in is2013Mathematical Induction
  45. 45If , then is equal to2013Logarithm
  46. 46The smallest positive integer for which is2013Terms of Binomial Expansion
  47. 47If , then is equal to2013Sum and difference of angles
  48. 48If , then is equal to2013Converting one Inverse T function to other Inverse T
  49. 49If and then is equal to2013Ratio and Proportion
  50. 50The equation of the director circle of the hyperbola is given by2013Director Circle
  51. 51If is the set of all relations other than with the binary operation * defined by for all in , then the identity in with respect to is2013Mathematical Reasoning
  52. 52The circle touches2013General Equation of 2nd degree curve
  53. 53Which of the following is true?2013Mathematical Reasoning
  54. 54The set of all integral multiples of is a subgroup of2013Mathematical Reasoning
  55. 55The value of so that and cut orthogonally is2013Intersection of Circles
  56. 56is equal to2013Special Forms
  57. 57If , then is equal to2013Basic Identities & T Ratios
  58. 58In a if then the area of the circumcircle of in square units is2013Sine Rule and its application
  59. 59If , then is equal to2013Basic Identities & T Ratios
  60. 60If denotes the set of all real number, then the function defined is2013Types of Function (Mapping)

Physics

  1. 1The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is of the 2013Doppler's Effect
  2. 2Three long straight wires and are carrying currents as shown in figure, then the resultant force on is directed2013Force and Torque on Current Carrying Conductor
  3. 3Curie-Weiss law is obeyed by iron2013Magnetic Materials and their Properties
  4. 4A magnet is suspended from a spring and when it oscillates, the magnet moves in and out of the coil . The coil is connected to a galvanomete2013Magnetic Flux, Faraday's and Lenz law
  5. 5The dimensional formula for inductance is2013Dimensions
  6. 6The maximum current that can be measured by a galvanometer of resistance , is . It is converted into a voltmeter that can read upto . The re2013Electric Instruments
  7. 7The spectrum obtained from the chromosphere of the sun at the time of total solar eclipse is2013Atomic Spectrum
  8. 8Heavy water is2013Nuclear reactions
  9. 9The nuclear reactor at Kaiga is a2013Nuclear reactions
  10. 10When a body moves in a circular path, no work is done by the force since2013Work done
  11. 11A bullet moving with a speed of can just penetrate two planks of equal thickness, then the number of such planks penetrated by the same bull2013Uniform Motion
  12. 12Two bodies of masses and have equal momentum, then the ratio of their kinetic energies is2013momentum
  13. 13Absorption coefficient of an open window is2013Radiation
  14. 14The loudness and pitch of a sound note depend on2013Properties of Sound Waves
  15. 15In Melde's experiment in the transverse mode, the frequency of the tuning fork and the frequency of the waves in the string are in the ratio2013Vibration of String
  16. 16An electron is accelerated through a potential difference of . The velocity acquired by it is in )2013Photoelectric Effect
  17. 17An unknown resistance is connected in series with a resistance of . This combination is connected to one gap of a meter bridge, while a resi2013Wheatstone Bridge
  18. 18In the circuit shown, the internal resistance of the cell is negligible. The steady state current in the resistor is2013AC Circuits
  19. 19A rectangular coil of turns has an average area of . The coil rotates with a speed of in uniform magnetic field of strength about an axis pe2013Motional and Rotational EMF
  20. 20In an circuit, the potential difference between the terminals of the inductance is , between the terminals of the capacitor is and that betw2013AC Circuits
  21. 21A vertical circular coil of radius and having turns carries a steady current. When the plane of the coil is normal to the magnetic meridian,2013Earths magnetic field
  22. 22A thread is tied slightly loose to a wire frame as shown in figure and the frame is dipped into a soap solution and taken out. The frame is 2013Surface tension
  23. 23Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen and oxygen are mixed. The ratio of speed of sound in the mixture to that2013Speed of Sound Waves
  24. 24If two waves of the same frequency and amplitude respectively on superposition produce a resultant disturbance of the same amplitude, the wa2013Interference and Superposition of Waves
  25. 25A man, standing between two cliffs, claps his hands and starts hearing a series of echoes at intervals of one second. If the speed of sound 2013Rest and Motion
  26. 26A beam of light of wavelength from a source falls on a single slit wide and the resulting diffraction pattern is observed on a screen away. 2013Diffraction of Light
  27. 27The pair of quantities having same dimensions is2013Dimensions
  28. 28The displacement (in ) of a particle of mass (in ) moving in one dimension under the action of a force, is related to time (in ) by . The di2013Uniform Motion
  29. 29Vectors and are such that and , then the vector parallel to is2013Multiplication of Vectors
  30. 30The primary of a transformer when connected to a DC battery of draws a current of . The number of turns of the primary and secondary winding2013Transformers
  31. 31One coolie takes to raise a suitcase through a height of but the second coolie takes to raise the same suitcase to the same height. The powe2013Power
  32. 32An electric dipole of dipole moment is aligned parallel to a uniform electric field . The energy required to rotate the dipole by is2013Electric Dipole
  33. 33A car is moving in a circular horizontal track of radius with a constant speed of . A bob is suspended from the roof of the car by a light w2013Newton's laws of motion
  34. 34The radius of a planet is twice the radius of earth. Both have almost equal average mass-densities. and are escape velocities of the planet 2013Gravitational potential and Potential Energy
  35. 35If the ratio of diameters, lengths and Young's modulus of steel and copper wires shown in the figure are and respectively, then the correspo2013Young's Modulus and Breaking Stres
  36. 36Which of the following relations does not give the equation of an adiabatic process, where terms have their usual meaning?2013Thermodynamic Processes
  37. 37A particle of mass is kept at rest at a height from the surface of earth, where is radius of earth and is mass of earth. The minimum speed w2013Gravitational potential and Potential Energy
  38. 38polaroid is prepared by2013Polarization of Light
  39. 39unit of permittivity is2013Units
  40. 40A spherical drop of capacitance is broken into eight drops of equal radius, then the capacitance of each small drop is2013Grouping of capacitors
  41. 41Two equal forces each act at a point inclined to each other at an angle of . The magnitude of their resultant is2013Addition and Subtraction of Vectors
  42. 42Threshold wavelength for photoelectric emission from a metal surface is . Photoelectrons will be emitted, when this surface is illuminated w2013Photoelectric Effect
  43. 43In Young's double slit experiment, if monochromatic light used is replaced by white light, then2013Youngs Double Slit Experiment
  44. 44Which state of triply ionised Beryllium has the same orbital radius as that of the ground state of hydrogen?2013Atomic Spectrum
  45. 45If is the atomic mass and is the mass number, packing fraction is given by2013Atomic Structure
  46. 46A count rate meter shows a count of per min from a given radioactive source. One hour later, the meter shows a count rate of per min. The ha2013Radioactivity
  47. 47Two conductors of the same material have their diameters in the ratio and their lengths in the ratio . If the temperature difference between2013Radiation
  48. 48Blowing air with open mouth is an example of2013Thermodynamic Processes
  49. 49Sound waves in air are always longitudinal because2013Properties of Sound Waves
  50. 50An uncharged sphere of metal is placed inside a charged parallel plate capacitor. The lines of force will look like2013Electric Charge and Coulomb's law
  51. 51A current flows in a conductor from East to West. The direction of the magnetic field at a point above the conductor is2013Biot-Savart's Law and Ampere's Circuital Law
  52. 52A bar magnet is equivalent to2013Magnetism and Properties of Magnet
  53. 53Excitation energy of a hydrogen like ion in its first excitation state is . Energy needed to remove the electron from the ion in ground stat2013Atomic Spectrum
  54. 54The refractive index of a particular material is for blue light, for yellow light and for red light. The dispersive power of the material is2013Prism and Dispersion of Light
  55. 55An ideal gas heat engine operates in a Carnot's cycle between and . It absorbs at high temperature. The amount of heat converted into work i2013Heat Engine, Refrigerator and Second Law of Thermodynamics
  56. 56Which one of the following graphs represents the behaviour of an ideal gas?2013Gas Laws
  57. 57Rainbow is formed due to2013Diffraction of Light
  58. 58A beam of parallel rays is brought to focus by a plano-convex lens. A thin concave lens of the same focal length is joined to the first lens2013Combination of Lens and Mirrors
  59. 59When a body is earth connected, electrons from the earth flow into the body. This means the body is2013Electric Charge and Coulomb's law
  60. 60Effective capacitance between and in the figure shown is (all capacitances are in )2013Wheatstone Bridge

Frequently Asked Questions

1.How many questions are in the COMEDK 2013 paper?

This paper has 180 questions in total - 60 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 paper.

3.How is the COMEDK 2013 paper structured?

The COMEDK 2013 paper on MARKS has 180 questions, organised by subject:

  • Chemistry: 60 questions - 60 single-correct.
  • Mathematics: 60 questions - 60 single-correct.
  • Physics: 60 questions - 60 single-correct.
4.How difficult is the COMEDK 2013 paper?

Each question on MARKS carries a difficulty rating. Of the 180 rated questions in this paper, 105 (58%) are easy, 54 (30%) are medium and 21 (12%) are hard. Subject wise:

  • Chemistry: 29 easy, 20 medium, 11 hard
  • Mathematics: 39 easy, 15 medium, 6 hard
  • Physics: 37 easy, 19 medium, 4 hard
5.Which chapters were asked the most in the COMEDK 2013 paper?

The chapters with the most questions in each subject were:

  • Chemistry: Chemical Kinetics (5), Biomolecules (4), and Aldehydes and Ketones (3).
  • Mathematics: Mathematical Reasoning (6), Application of Derivatives (4), and Circle (4).
  • Physics: Waves and Sound (6), Atomic Physics (4), and Wave Optics (4).
6.Where can I find the solutions for the COMEDK 2013 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 COMEDK 2013 paper to check my preparation?

Set a timer, attempt the 180 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 COMEDK. Repeating this with other papers shows whether the same weak spots keep coming back.

8.Will the COMEDK 2013 paper help me prepare for COMEDK 2027?

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