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JEE Main 2012 12th May Online

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2012 12th May Online 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 90 questions in total - 31 easy (34%), 41 moderate (46%) and 18 tough (20%). That's a fairly typical mix for this exam. By subject: Physics 33% easy, 43% moderate, 23% tough; Chemistry 43% easy, 47% moderate, 10% tough; Mathematics 27% easy, 47% moderate, 27% tough.

Chemistry questions were spread across 24 chapters, with Chemical Bonding and Molecular Structure (3), Chemical Equilibrium (2), and Haloalkanes and Haloarenes (2) carrying the most weight. Mathematics questions were spread across 24 chapters, with Application of Derivatives (2), Area Under Curves (2), and Quadratic Equation (2) carrying the most weight. Physics questions were spread across 20 chapters, with Center of Mass Momentum and Collision (3), Current Electricity (3), and Atomic Physics (2) carrying the most weight.

Chemistry

  1. 1The conversion of benzene diazonium chloride to bromobenzene can be accomplished by12 May, 2012 (Online)Preparation and Properties of Amines
  2. 2The radius of a calcium ion is and of the oxide ion is . The possible crystal structure of calcium oxide will be12 May, 2012 (Online)Crystal Structure of Solids
  3. 3The formation of molecular complex results in a change in hybridization of boron12 May, 2012 (Online)Hybridisation and VSEPR Theory
  4. 4A metal on heating in nitrogen gas gives . on treatment with gives a colourless gas which when passed through solution gives a blue colour. 12 May, 2012 (Online)Compounds of Alkaline Earth Metals
  5. 5Water sample is reported to be highly polluted if BOD (Biological Oxygen Demand) value of sample becomes12 May, 2012 (Online)Water Pollution
  6. 6A solution containing of in of water freezes at . The apparent degree of dissociation of the salt is for water , atomic mass: and12 May, 2012 (Online)Colligative Properties and Abnormal Molecular Masses
  7. 7Which of the following complex ions will exhibit optical isomerism? (en = 1, 2-diamine ethane).12 May, 2012 (Online)Isomerism of coordination compounds
  8. 8Which among the following elements has the highest first ionization enthalpy?12 May, 2012 (Online)Periodic properties
  9. 9Magnetic moment of ion is12 May, 2012 (Online)F-Block elements
  10. 10An aqueous solution of oxalic acid dihydrate contains its in . The volume of required to completely neutralize of this solution12 May, 2012 (Online)Concentration terms
  11. 11In the electrolysis of alumina to obtain aluminium metal, cryolite is added mainly to12 May, 2012 (Online)Extraction of Metals
  12. 12Synthetic polymer bakelite can be prepared from following compounds12 May, 2012 (Online)Preparation and Properties of Polymers
  13. 13The correct statement for both the processes of physisorption and chemisorption is12 May, 2012 (Online)Adsorption
  14. 14Which of the following statements is wrong?12 May, 2012 (Online)Preparation and Properties of Monohalides
  15. 15Although ion and molecule are isoelectronic, yet molecule is chemically inert because of12 May, 2012 (Online)Polarization
  16. 16Amylopectin is a polymer of12 May, 2012 (Online)Proteins
  17. 17If the radius of first orbit of atom is , the deBroglie wavelength of an electron in the third orbit is12 May, 2012 (Online)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  18. 18Chemically heroin is12 May, 2012 (Online)Drugs and It's Classification
  19. 19In the given reaction, the product 'A' is12 May, 2012 (Online)Preparation and Properties of Aryl Halides
  20. 20The ppm level of in a sample of a tooth paste containing is12 May, 2012 (Online)Solubility and Concentration of Solutions
  21. 21In a chemical reaction is converted into . The rates of reaction, starting with initial concentrations of as and , are equal to and respecti12 May, 2012 (Online)Rate of reaction
  22. 22of are introduced into a vessel. If it dissociates as . At equilibrium, of are found to be present. The equilibrium constant of this reactio12 May, 2012 (Online)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  23. 23of benzene on nitration gave of nitrobenzene. The theoretical yield of the nitrobenzene will be12 May, 2012 (Online)Quantitative measures in chemical equations
  24. 24Given (i) (ii) . These equilibria show the following order of the relative base strength,12 May, 2012 (Online)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  25. 25In the below mentioned compounds the decreasing order of reactivity towards electrophilic substitution is (i) (ii) (iii) (iv)12 May, 2012 (Online)Electron displacement effects
  26. 26The difference between the reaction enthalpy change and reaction internal energy change for the reaction: at is12 May, 2012 (Online)First Law and Basic Fundamentals of Thermodynamics
  27. 27The reaction,12 May, 2012 (Online)Properties and Preparation of Alkanes
  28. 28and represent most probable velocity, average velocity and root mean square velocity respectively of a gas at a particular temperature. The 12 May, 2012 (Online)Kinetic theory of gases
  29. 29Among the following chloro-compound having the lowest dipole moment is12 May, 2012 (Online)Dipole moment
  30. 30In the following balanced reaction, values of and respectively are12 May, 2012 (Online)Balancing of redox reactions

Mathematics

  1. 1If and are distinct real numbers such that , then12 May, 2012 (Online)Range of Quadratic Function
  2. 2The area of triangle formed by the lines joining the vertex of the parabola, , to the extremities of its latus rectum is12 May, 2012 (Online)standard equation of parabola
  3. 3Let and be real matrices of the form and , respectively. Statement 1: is always an invertible matrix. Statement is never an identity matrix.12 May, 2012 (Online)Inverse of a Matrix
  4. 4If in a triangle , then is equal to12 May, 2012 (Online)Cosine Rule and Projection Formula
  5. 5Statement 1: If and be two sets having and elements respectively, where . Then the total number of functions from set to set is Statement 2:12 May, 2012 (Online)Domain
  6. 6A unit vector which is perpendicular to the vector and is coplanar with the vectors and is12 May, 2012 (Online)Line in Space
  7. 7The number of terms in the expansion of , in which powers of and are free from radical signs are12 May, 2012 (Online)Terms of Binomial Expansion
  8. 8If the point lies between the straight lines and then a lies in interval12 May, 2012 (Online)Point and Line
  9. 9If two vertices of a triangle are and and its orthocentre is at , then the third vertex is12 May, 2012 (Online)Locus
  10. 10Statement 1: A function is continuous at if and only if exists and Statement 2: A function is discontinuous at if and only if, exists and12 May, 2012 (Online)Continuity
  11. 11The sum of the series upto 15 terms is12 May, 2012 (Online)Summation of Series
  12. 12The coordinates of the foot perpendicular from the point to the line12 May, 2012 (Online)Line in Space
  13. 13If and are vectors in 3-dimensional space, then the maximum possible value of is12 May, 2012 (Online)Scalar Triple Product
  14. 14If the mean of and a is 7 , then the mean deviation from the median of these observations is12 May, 2012 (Online)Mean Square Deviation
  15. 15Consider a rectangle whose length is increasing at the uniform rate of , breadth is decreasing at the uniform rate of and the area is decrea12 May, 2012 (Online)Maxima Minima
  16. 16If and , then equals12 May, 2012 (Online)Differentiation of composite functions
  17. 17The area of the triangle whose vertices are complex numbers in the Argand diagram is12 May, 2012 (Online)Geometry of Complex Number
  18. 18Statement 1: The degrees of the differential equations and are equal. Statement 2: The degree of a differential equation, when it is a polyn12 May, 2012 (Online)Order and Degree
  19. 19Statement 1: If the points and and are coplanar, then . Statement 2: If the 4 points and are coplanar, then the volume of the tetrahedron is12 May, 2012 (Online)Algebra of Vectors
  20. 20If and are two points on the ellipse at which the tangents are parallel to the chord joining the points and , then the distance between and 12 May, 2012 (Online)Tangent to ellipse
  21. 21The area enclosed by the curves , and , where , is . The equals12 May, 2012 (Online)Area bounded by two curves
  22. 22If , then is12 May, 2012 (Online)Monotonicity
  23. 23The integral of w.r.t. is12 May, 2012 (Online)Integration by Substitution
  24. 24The logically equivalent preposition of is12 May, 2012 (Online)Mathematical Reasoning
  25. 25If then is equal to12 May, 2012 (Online)Expansion of Determinants
  26. 26If and is a multiple of 3 or , where is the set of positive integers, then the total number of symmetric relations on is12 May, 2012 (Online)Questions on number of relations and sets
  27. 27If the sum of the square of the roots of the equation is least, then is equal to12 May, 2012 (Online)Relation between Roots and Coefficients
  28. 28If , then is equal to12 May, 2012 (Online)Leibnitz Rule of Differentiation
  29. 29A number is randomly selected from the set . The probability that is an integer is12 May, 2012 (Online)Classical Definition of Probability
  30. 30If a straight line divides the region into two parts, then the ratio of the area of the smaller part to the area of the greater part is12 May, 2012 (Online)Area bounded by two curves

Physics

  1. 1A hypothetical atom has only three energy levels. The ground level has energy, . The two excited states have energies, and . Then which of t12 May, 2012 (Online)Atomic Spectrum
  2. 2A given ideal gas with at a temperature . If the gas is compressed adiabatically to one-fourth of its initial volume, the final temperature 12 May, 2012 (Online)Thermodynamic Processes
  3. 3A resistance and a capacitance are connected in series to a battery of negligible internal resistance through a key. The key is closed at 0 12 May, 2012 (Online)AC Circuits
  4. 4The magnetic force acting on charged particle of charge in magnetic field of acting in direction, when the particle velocity is is12 May, 2012 (Online)Force and Torque on Current Carrying Conductor
  5. 5This question has Statement 1 and Statement 2. Of the four choices given after the Statements, choose the one that best describes the two St12 May, 2012 (Online)Energy Bands in Solids
  6. 6A projectile moving vertically upwards with a velocity of breaks into two equal parts at a height of . One part starts moving vertically upw12 May, 2012 (Online)momentum
  7. 7moles of an ideal gas undergo a process as shown in the figure. Maximum temperature of the gas during the process is12 May, 2012 (Online)Thermodynamic Processes
  8. 8A student measured the diameter of a wire using a screw gauge with the least count and listed the measurements. The measured value should be12 May, 2012 (Online)Units
  9. 9The first diffraction minimum due to the single slit diffraction is seen at for a light of wavelength falling perpendicularly on the slit. T12 May, 2012 (Online)Diffraction of Light
  10. 10This question has Statement 1 and Statement 2 . Of the four choices given after the Statements, choose the one that best describes the two S12 May, 2012 (Online)Doppler's Effect
  11. 11Assuming the earth to be a sphere of uniform density, the acceleration due to gravity inside the earth at a distance of from the centre is p12 May, 2012 (Online)Acceleration Due to Gravity
  12. 12A doubly ionised atom is excited from its ground to state. The wavelengths of the spectral lines are given by and . The ratio and are, respe12 May, 2012 (Online)Atomic Spectrum
  13. 13Which of the following Statements is correct?12 May, 2012 (Online)Nuclear structure
  14. 14The distance travelled by a body moving along a line in time is proportional to . The acceleration-time graph for the motion of the body wil12 May, 2012 (Online)Graphs of motion in one dimension
  15. 15A wave represented by the equation is superimposed with another wave to form a stationary wave such that the point is node. The equation for12 May, 2012 (Online)Interference and Superposition of Waves
  16. 16An insect crawls up a hemispherical surface very slowly. The coefficient of friction between the insect and the surface is . If the line joi12 May, 2012 (Online)Frictional force
  17. 17Water is flowing through a horizontal tube having cross-sectional areas of its two ends being and such that the ratio is 5 . If the pressure12 May, 2012 (Online)Hydrodynamics
  18. 18A solid sphere is rolling on a surface as shown in figure, with a translational velocity . If it is to climb the inclined surface continuing12 May, 2012 (Online)Combination of translation and rotation
  19. 19Three resistors of and are connected in parallel and the combination is connected in series with a battery of internal resistance. The rate 12 May, 2012 (Online)Electric Power and Heating Effect of Current
  20. 20We wish to make a microscope with the help of two positive lenses both with a focal length of 20 each and the object is positioned from the 12 May, 2012 (Online)Optical Instruments
  21. 21Magnetic flux through a coil of resistance is changed by in . The resulting current in the coil varies with time as shown in the figure. The12 May, 2012 (Online)Magnetic Flux, Faraday's and Lenz law
  22. 22A series combination of capacitors, each of capacity is charged by source of potential difference . When another parallel combination of cap12 May, 2012 (Online)Force and Energy stored in capacitor
  23. 23It is preferable to measure the e.m.f. of a cell by potentiometer than by a voltmeter because of the following possible reasons. (i) In case12 May, 2012 (Online)Electric Instruments
  24. 24Two bodies and of mass and respectively are placed on a smooth floor. They are connected by a spring of negligible mass. third body of mass 12 May, 2012 (Online)Collisions
  25. 25The circuit in figure consists of wires at the top and bottom and identical springs as the left and right sides. The wire at the bottom has 12 May, 2012 (Online)Force and Torque on Current Carrying Conductor
  26. 26In a sensitive meter bridge apparatus the bridge wire should possess12 May, 2012 (Online)Wheatstone Bridge
  27. 27A spring is compressed between two blocks of masses and placed on a horizontal frictionless surface as shown in the figure. When the blocks 12 May, 2012 (Online)momentum
  28. 28This question has Statement 1 and Statement 2. Of the four choices given after the Statements, choose the one that best describes the two St12 May, 2012 (Online)Angular momentum and Angular impulse
  29. 29A transmitter emits radio waves of wavelength . The number of photons emitted per second by the transmitter is of the order of12 May, 2012 (Online)Communication System
  30. 30The maximum number of possible interference maxima for slit separation equal to , where is the wavelength of light used, in a Young's double12 May, 2012 (Online)Youngs Double Slit Experiment

Frequently Asked Questions

1.How many questions are in the JEE Main 2012 12th May Online paper?

This paper has 90 questions in total - 30 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 JEE Main 2012 12th May Online paper structured?

The JEE Main 2012 12th May Online paper on MARKS has 90 questions, organised by subject:

  • Chemistry: 30 questions - 30 single-correct.
  • Mathematics: 30 questions - 30 single-correct.
  • Physics: 30 questions - 30 single-correct.
4.How difficult is the JEE Main 2012 12th May Online paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 31 (34%) are easy, 41 (46%) are medium and 18 (20%) are hard. Subject wise:

  • Chemistry: 13 easy, 14 medium, 3 hard
  • Mathematics: 8 easy, 14 medium, 8 hard
  • Physics: 10 easy, 13 medium, 7 hard
5.Which chapters were asked the most in the JEE Main 2012 12th May Online paper?

The chapters with the most questions in each subject were:

  • Chemistry: Chemical Bonding and Molecular Structure (3), Chemical Equilibrium (2), and Haloalkanes and Haloarenes (2).
  • Mathematics: Application of Derivatives (2), Area Under Curves (2), and Quadratic Equation (2).
  • Physics: Center of Mass Momentum and Collision (3), Current Electricity (3), and Atomic Physics (2).
6.Are there any out-of-syllabus questions in the JEE Main 2012 12th May Online paper?

Yes. 15 of the 90 questions in this paper are marked on MARKS as outside the current syllabus. You can still practise them for the concept, but they are a lower priority if you are short on time.

7.Where can I find the solutions for the JEE Main 2012 12th May Online 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.

8.How should I use the JEE Main 2012 12th May Online paper to check my preparation?

Set a timer, attempt the 90 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 JEE Main. Repeating this with other papers shows whether the same weak spots keep coming back.

9.Will the JEE Main 2012 12th May Online paper help me prepare for JEE Main 2027?

Yes. Every past paper shows the question styles and topics JEE Main 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.