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AIIMS 2012

Browse the complete Botany, Chemistry, Physics, and Zoology question set from the AIIMS 2012 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 - 106 easy (59%), 37 moderate (21%) and 37 tough (21%). 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 57% easy, 28% moderate, 15% tough; Chemistry 56% easy, 31% moderate, 13% tough; Zoology 52% easy, 0% moderate, 48% tough; Botany 81% easy, 4% moderate, 15% tough.

Botany questions were spread across 15 chapters, with Biodiversity and its Conservation (3), Cell Cycle and Cell Division (3), and Morphology of Flowering Plants (3) carrying the most weight. Chemistry questions were spread across 24 chapters, with p Block Elements (Group 15, 16, 17 & 18) (7), General Organic Chemistry (6), and Chemical Bonding and Molecular Structure (5) carrying the most weight. Physics questions were spread across 24 chapters, with Magnetic Effects of Current (7), Nuclear Physics (6), and Electrostatics (5) carrying the most weight. Zoology questions were spread across 16 chapters, with Chemical Coordination and Integration (4), Digestion and Absorption (3), and Human Health and Diseases (3) carrying the most weight.

Botany

  1. 1In a normal adult, ascending order of concentration of following molecules is2012Chemical Nature of Protoplasm
  2. 2Select the option having all correctly matched pairs. A. Alkaloids (i) Carotenoid; Anthocyanin B. Pigments (ii) Vinblastin; curcumin C. Drug2012Primary and Secondary Metabolites
  3. 3Microtubule depolymerizing drug such as colchicine is expected to2012M-phase (Mitotic Phase)
  4. 4Which of the following statements is incorrect about phase?2012Interphase
  5. 5Beads on string like structures of are seen in , which further condense to form chromosomes in C stage of cell division. A B C2012M-phase (Mitotic Phase)
  6. 6pump is associated with2012Uptake of Mineral Nutrients
  7. 7The microscope usually used for seeing living cells or tissues is2012Cell Membranes
  8. 8Which of the following is correctly matched?2012The Root
  9. 9Plants with inferior ovary usually bear2012The Flower
  10. 10Plants having the above given floral diagram are2012Technical Description of Angiosperm
  11. 11One of the world’s most poisonous fish toxins is released by2012Phylum Chordata
  12. 12Abscisic acid is known as the stress hormone because it2012Plant Growth Regulators
  13. 13Which one has the largest species variety in India?2012Introduction
  14. 14Dust, oolong and brick are varieties of2012Introduction
  15. 15Assertion : There are 34 biodiversity hotspots in the world. Reason : High level of species richness is a criteria for selection of a biodiv2012Biodiversity Conservation in India
  16. 16In aerobic respiration, total number of ATP molecules formed from 1 glucose molecule is2012Aerobic Respiration
  17. 17Leghaemoglobin is produced in response to2012Nitrogen Metabolism
  18. 18Assertion : Excess in soil, can adversely decrease and concentrations in the soil. Reason : Mn increases rate of photosynthesis, thereby inc2012Role of Micro and Macronutrients
  19. 19Deuteromycetes are known as fungi imperfecti because2012Kingdom Fungi
  20. 20Photorespiration shows formation of2012Mechanism of Photosynthesis
  21. 21Which of the following is correctly labelled for the given figure?2012Mechanism of Photosynthesis
  22. 22Kranz anatomy is usually associated with2012Mechanism of Photosynthesis
  23. 23Cattle ranches are known to causes acute green house effect. This is due to2012Pollution
  24. 24Select the correct statement.2012Pollution
  25. 25Assertion : Complexity of classification increases from kingdom to species. Reason : Common characters increase from kingdom to species.2012Diversity in the Living World
  26. 26Assertion : In a terrestrial ecosystem, detritus food chain is the major conduit for energy flow. Reason : Solar energy is the direct source2012Functions of Ecosystem

Chemistry

  1. 1Which of the following is a chiral compound?2012Isomerism of Organic Compounds
  2. 2Which of the following compounds are optically active?2012Isomerism of Organic Compounds
  3. 3Number of isomers of2012Isomerism of Organic Compounds
  4. 4@ increases in benzoic acid when substituent " " is bonded at para-position, then " " is2012Electron displacement effects
  5. 5Assertion : 1, 2-dichloroethane is optically active. Reason : Meso compound is optically active.2012Isomerism of Organic Compounds
  6. 6Assertion : Phenol is more reactive than benzene towards electrophilic substitution reaction. Reason : In the case of phenol, the intermedia2012Attacking reagents
  7. 7Which is not stable under ambient condition?2012Molecular Orbital Theory
  8. 8The dipole moment is minimum in2012Dipole moment
  9. 9Assertion : has T-shape structure. Reason : It has two lone pairs arranged at angle.2012Hybridisation and VSEPR Theory
  10. 10Assertion : is paramagnetic. Reason : It has one unpaired electron.2012Molecular Orbital Theory
  11. 11Assertion : is more basic than . Reason : Size of increases and shows more covalent character.2012Polarization
  12. 12In a set of reactions, acetic acid yielded a product . The structure of would be2012Preparation and Properties of Acid Derivatives
  13. 13Threshold frequency of a metal is upon which frequency light is focused. Then the maximum kinetic energy of emitted electron is2012Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  14. 14In Bohr's orbit, indicates2012Bohr's model
  15. 15Assertion : Bohr model fails in case of multielectron species. Reason : It does not mention electron-electron interactions.2012Bohr's model
  16. 16Assertion : The spectrum of is expected to be similar to that of hydrogen. Reason : is also one electron system.2012Hydrogen spectrum
  17. 17Which has the highest ?2012PH of solutions
  18. 18Which is correct order of solubility in water?2012General Characteristics of Alkali Metals
  19. 19At equilibrium which is correct?2012Third law of thermodynamics
  20. 20Bond dissociation energy of is and is . Then bond dissociation energy of bond is2012Laws of Thermochemistry and Enthalpy Change
  21. 21How many bond present in ?2012Phosphorus and Its Compounds
  22. 22Which of the following is the correct statement for ?2012Phosphorus and Its Compounds
  23. 23have2012Sulphur and Its Compounds
  24. 24bond length is minimum in2012Nitrogen and Its Compounds
  25. 25Assertion : has strong reducing property but does not. Reason : bond present in .2012Phosphorus and Its Compounds
  26. 26Assertion : Fluorine is a stronger oxidizing agent than iodine. Reason : Fluorine has greater electronegativity than iodine.2012Halogens and Its Compounds
  27. 27Assertion : gas bleaches the articles permanently. Reason : is a strong reducing agent.2012Halogens and Its Compounds
  28. 28For silicon which is not correct?2012Silicon and Its Compounds
  29. 29If is doped with ,2012Silicon and Its Compounds
  30. 30Living in the atmosphere of is dangerous, because it2012Carbon and Its Compounds
  31. 31Assertion : Diamond and graphite do not have the same crystal structure. Reason : Diamond is crystalline while graphite is amorphous.2012Carbon and Its Compounds
  32. 32Assertion : ion is a weak ligand and forms outer orbital complex. Reason : ion cannot force the electrons of and orbitals of the inner shell2012Terminology of coordination compounds
  33. 33Assertion : is paramagnetic. Reason : The Fe in has three unpaired electrons.2012Werner's theory and Valence Bond Theory
  34. 34A colloidal solution is kept in dark and is illuminated by a beam of light then brightness appears at the right angle of direction of light.2012Properties of colloidal solution
  35. 35Which is the major product formed when undergoes nitration?2012Reactions of aromatic compounds
  36. 36But-1-ene ? The product in the above reaction is2012Reactions of alkenes
  37. 37Nitrobenzene will be2012Reactions of alkenes
  38. 38Assertion : Sodiumacetate on Kolbe'selectrolysis gives methane. Reason : Methyl free radical is formed at cathode.2012Properties and Preparation of Alkanes
  39. 39Assertion : is more stable than . Reason : has more s-character than2012Properties and Preparation of Alkynes
  40. 40For then EMF of the cell (1 atm) will be2012Cells and Electrode Potential, Nernst Equation
  41. 41In structure contribution of corner and central atom is2012Cubic system
  42. 42has arrangement. Its unit cell edge length is . Its inter-ionic distance is2012Cubic system
  43. 43for following reaction will be2012Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  44. 44At and is dissociated into then is2012Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  45. 45in an acidic medium dissociates into2012Compounds of Transition Metals
  46. 46Magnetic moment of is nearest to2012Properties of D-block elements
  47. 47Assertion : is used as an oxidising agent in volumetric analysis. Reason : has the tendency of attaining +3 oxidation state.2012F-Block elements
  48. 48Assertion : The solubility of a gas in a liquid increases with increase of pressure. Reason : The solubility of a gas in a liquid is directl2012Henry's law
  49. 49Which will not form precipitation after addition of in presence of ?2012Redox titration
  50. 50For a reaction, then unit of rate of reaction and rate constant respectively is2012Rate law and rate constant
  51. 51If is a straight line graph then determine the order of reaction.2012Methods to determine order of reaction
  52. 52Assertion : Rate of reaction doubles when concentration of reactant is doubled if it is a first order reaction. Reason : Rate constant also 2012Integrated rate laws
  53. 53Which is correct example of condensation polymer?2012Classification of Polymers
  54. 54The final product is :2012Preparation and Properties of Monohalides
  55. 55An aromatic compound , gives on boiling with alcoholic solution and yields on treatment with sodium hydroxide. on oxidation gives monochloro2012Preparation and Properties of Monohalides
  56. 56Arrange the following gases in order of their critical temperature.2012Critical phenomena and liquefaction
  57. 57Assertion : In a pressure cooker, the water is brought to boil. The cooker is then removed from the stove. Now on removing the lid of pressu2012Gas laws and Ideal Gas Equation
  58. 58If phthalic acid is treated with and then it is first heated weakly then strongly, the final product formed is2012Properties and Preparation of Amino Acids
  59. 59Which of the following is a homopolysaccharide?2012Carbohydrates
  60. 60Difference in atomic radius is maximum for2012Periodic properties
  61. 61Assertion : is less acidic than . Reason : is less electronegative than Se.2012Periodic properties

Physics

  1. 1Two sinusoidal waves of intensity having same frequency and same amplitude interferes constructively at a point. The resultant intensity at 2012Interference of Light
  2. 2In Young's double slit experiment, fringe order is represented by , then fringe width is2012Youngs Double Slit Experiment
  3. 3A light ray is incident on a glass slab, it is partially reflected and partially transmitted. Then the reflected ray is2012Polarization of Light
  4. 4A roller is attached to a massless spring of spring constant . It rolls without slipping along a frictionless horizontal road. The roller is2012Rolling without Slipping
  5. 5If mass is rotating on a circular path of radius with angular velocity of . If radius of the path becomes , then what will be the value of a2012Angular momentum and Angular impulse
  6. 6A solid cylinder, a circular disc, a solid sphere and a hollow cylinder of the same radius are placed on an inclined plane. Which of the fol2012Moment of inertia of rigid bodies
  7. 7Conversion of water to steam is accompanied by which process?2012Thermodynamic Processes
  8. 8An ideal gas is taken through the cycle , as shown in figure. If the net heat supplied to the gas in the cycle is the work done by the gas i2012Thermodynamic Processes
  9. 9What is the slope for an isothermal process?2012Thermodynamic Processes
  10. 10Dimensional formula of , heat supplied to the system is given by2012Dimensions
  11. 11Two conductors having same width and length, thickness and , thermal conductivity and are placed one above the another. Find the equivalent 2012Conduction
  12. 12Assertion : Maximum air flow due to convection does not occur at the north pole but it occurs at Reason : There is maximum temperature diffe2012Convection
  13. 13Half life of a radio-active element is 8 years, how much amount will be present after 32 years?2012Radioactivity
  14. 14Gamma decay takes place2012Radioactivity
  15. 15The nucleus emits one particle and -particles. The resulting nucleus is2012Radioactivity
  16. 16Assertion: At rest, radium is decayed into Radon and an -particle. They both moves back to back of each other. Reason : Splitting of radioac2012Radioactivity
  17. 17Assertion : More energy is released in fusion than fission. Reason : More number of nucleons take part in fission.2012Nuclear reactions
  18. 18Assertion : -radiation emission occurs after and decay. Reason : Energy levels occur in nucleus.2012Radioactivity
  19. 19A wire of mass , length and current is balanced in mid air by a magnetic field , then find the value of .2012Force and Torque on Current Carrying Conductor
  20. 20A toroid with mean radius , diameter have turns carrying current . What is the magnetic field inside the toroid?2012Magnetic Field
  21. 21The minimum magnetic dipole moment of electron in hydrogen atom is2012Magnetic Dipole
  22. 22Two wires carrying2012Force and Torque on Current Carrying Conductor
  23. 23Assertion : Magnetic force is always perpendicular to the magnetic field. Reason : Electric force is along the direction of electric field.2012Motion of Charged Particle in Magnetic Field
  24. 24Assertion : A planar circular loop of area and carrying current is equivalent to magnetic dipole of dipole moment . Reason : At large distan2012Magnetic Dipole
  25. 25Assertion : A charged particle can be accelerated in a cyclotron by the alternate distribution of the field. Reason : Energy of charged part2012Motion of Charged Particle in Magnetic Field
  26. 26Calculate for the given circuit diagram.2012Wheatstone Bridge
  27. 27Calculate the heat emitted by a bulb of in .2012Electric Power and Heating Effect of Current
  28. 28Assertion : In elastic collision, kinetic energy is conserved. Reason : Energy is always conserved.2012Collisions
  29. 29Find out the correct relation for the dependance of change in acceleration due to gravity on the angle at the latitude, due to rotation of e2012Acceleration Due to Gravity
  30. 30A particle moving about its equilibrium position with equation . Interpret the condition2012Simple Harmonic Motion
  31. 31Find the voltage drop across a capacitor connected with a resistance and a battery of in series after a long time.2012Charging and Discarging of capacitors
  32. 32A photon is incident having frequency . Threshold frequency of metal is . Find the kinetic energy of the ejected electron.2012Photoelectric Effect
  33. 33Calculate the kinetic energy of the electron having wavelength .2012Matter Waves
  34. 34Identify incorrect for electric charge2012Electric Charge and Coulomb's law
  35. 35Electric field outside a long wire carrying charge is proportional to2012Electric Field and Electric Field Lines
  36. 36An electron projected with velocity in the electric field . Trace the path followed by the electron .2012Electric Field and Electric Field Lines
  37. 37Assertion : An electrostatic field line never form closed loop. Reason : Electrostatic field is a conservative field.2012Electric Field and Electric Field Lines
  38. 38Assertion : Gauss's law shows diversion when inverse square law is not obeyed. Reason : Gauss's law is a consequence of conservation of char2012Electric Flux and Gauss Law
  39. 39In an circuit, voltage and inductor is connected across the circuit. Then the instantaneous power will be2012Alternating Current, Voltage and Power
  40. 40In a given series circuit and , the current2012AC Circuits
  41. 41Which of the following parameter in the series LCR circuit is analogous to driving force in mechanics?2012AC Circuits
  42. 42A spherical body of diameter is falling in viscous medium. Its terminal velocity is proportional to2012Viscosity
  43. 43Assertion : Surface energy of an oil drop is same whether placed on glass or water surface. Reason : Surface energy is dependent only on the2012Surface tension
  44. 44Assertion : Turbulence is always dissipative. Reason : High reynold number promotes turbulence.2012Viscosity
  45. 45The frequency order for -rays -rays , rays is2012X-Rays
  46. 46Assertion : In electromagnetic waves electric field and magnetic field lines are perpendicular to each other. Reason : Electric field and ma2012Electromagnetic Waves and Maxwell's equations
  47. 47Which of the following current must be zero in an unbiased junction diode?2012Diodes
  48. 48In the given circuit, the voltage across the load is maintained at . The current in the zener diode varies from . What is the maximum wattag2012Diodes
  49. 49For a common-emitter transistor, input current is circuit is operated at load resistance of , then voltage across collector emitter will be2012Junction Transistors
  50. 50Assertion : A superconductor is a perfect diamagnetic substance. Reason : A superconductor is a perfect conductor.2012Magnetic Materials and their Properties
  51. 51In a convex lens of focal length , the minimum distance between an object and its real image must be2012Lens Formula, Refraction of light from curved surface
  52. 52Assertion: A thick lens shows more chromatic aberration. Reason : Thick lens behave as many thin lenses.2012Lens Formula, Refraction of light from curved surface
  53. 53Assertion : The focal length of objective lens in telescope is much more than that of eye piece. Reason : Telescope has high resolving power2012Optical Instruments
  54. 54Assertion : Animate object can accelerate in the absence of external force. Reason : Newton's second law is not applicable on animate object2012Newton's laws of motion
  55. 55Total energy of the electron in hydrogen atom above leads to2012Atomic Spectrum
  56. 56Assertion : Bohr's atomic model cannot be used to explain multiple electron species. Reason: It does not take inter-electronic interactions 2012Atomic Structure
  57. 57Assertion: Total energy of electron in an hydrogen atom is negative. Reason : It is bounded to the nucleus.2012Bohr's Atomic Model
  58. 58Degree of freedom for polyatomic gas2012Degree of Freedom and Specific Heat
  59. 59Assertion : Vibrational energy of diatomic molecule corresponding to each degree of freedom is . Reason : For every molecule, vibrational de2012Pressure and Energy of gas
  60. 60A particle is thrown vertically upwards with velocity from the surface of earth. Calculate its velocity at height . Where is the radius of e2012Energy

Zoology

  1. 1During muscular contraction, which of the following events occur? (i) H-zone disappears (ii) A band widens (iii) I band reduces in width (iv2012Locomotion
  2. 2Oxygen binding to haemoglobin in blood is2012Human Respiratory System
  3. 3Assertion : Extra oxygen consumption in human body is known as oxygen debt. Reason : The extra oxygen is required by the body to oxidise the2012Human Respiratory System
  4. 4Pebrine in silkworms is caused by2012Common Health Disease
  5. 5Assertion : Filarial worm is transmitted to humans by Culex mosquito. Reason : Culex prefers to breed in fresh water.2012Common Health Disease
  6. 6Assertion : AIDS is caused by the HIV, a retro-virus. Reason : Retroviruses have RNA genome.2012Aids
  7. 7Which is correctly labelled with respect to the given diagram?2012Populations
  8. 8Assertion : Some marine animals find it difficult to live in fresh water and vice versa. Reason : Some animals can tolerate a narrow salinit2012Abiotic Factors
  9. 9The extinct human ancestor, who ate only fruits and hunted with stone weapons was2012Human Evolution
  10. 10Assertion : denotes the homozygous condition for sickle-cell anaemia. Reason : It occurs due to substitution of glutamic acid by valine at t2012Genetic Disorders
  11. 11Assertion : A middle aged woman is reported to have small breasts and undersized uterus. Reason : Her genotypic analysis shows XO condition 2012Genetic Disorders
  12. 12Which of the following is correctly labelled?2012Sensory Organ
  13. 13The release of chemical messenger from synaptic vesicles is under the influence of these ion(s).2012Definition of Nerve Impulse
  14. 14Assertion : Mylein sheath insulates the nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in n2012Definition of Nerve Impulse
  15. 15Which of the following cartoon characters does not share its name with that of a gene?2012Structure of DNA
  16. 16Which of the following is correct regarding respiration in adult frog?2012Frog
  17. 17What is common between earthworm and Periplaneta?2012Earthworm
  18. 18Assertion : Frog can change its colour, according to its surroundings. Reason : It is a way of mimicry to capture preys.2012Frog
  19. 19Catecholamine in a normal person induces2012Adrenal Gland
  20. 20Assertion : Less iodine intake causes goitre. Reason : Less iodine in body decreases thyroxine secretion.2012Thyroid
  21. 21Assertion : A male is found to be lacking facial hair and pubic hair. Reason : It is a case of hyposecretion of testosterone from Leydig's c2012Testis
  22. 22Assertion : Oxytocin is also known as Antidiuretic hormone . Reason : Oxytocin can cause an increase in the renal reabsorption of water.2012Pituitary Gland
  23. 23Assertion : Emulsification is necessary for the digestion of fats. Reason : After fats are emulsified, the action of enzyme amylase gets sig2012Physiology of Digestion
  24. 24Assertion : In jaundice, the skin and mucous membranes assume a yellowish hue. Reason : Yellow pigment bilirubin imparts pale yellow colour 2012Liver
  25. 25Assertion : No taste sensation is evoked when drop of distilled water is put on human tongue. Reason : Man does not possess taste buds for t2012Introduction
  26. 26The ‘cells of Rauber’ are2012Embryology
  27. 27Choose the correct statement.2012Female Reproductive System
  28. 28RNA interference is essential for the2012Application in Agriculture
  29. 29Select the option having all the correct characteristics.2012Blood
  30. 30Ventricular diastole occurs due to a/an2012Circulatory Pathways
  31. 31Assertion : In proximal convoluted tubule glomerular filtrate becomes hypertonic to blood plasma. Reason : is absorbed only in the proximal 2012Mammalian Urinary System
  32. 32Apiculture is associated with which of the following groups of plants?2012Apiculture
  33. 33Assertion : Inbreeding increases homozygosity, thus exposes harmful recessive genes, which are eliminated by selection. Reason : Continued i2012Animal Breeding

Frequently Asked Questions

1.How many questions are in the AIIMS 2012 paper?

This paper has 180 questions in total - 26 from Botany, 61 from Chemistry, 60 from Physics, and 33 from Zoology.

2.Can I practise questions from just one subject?

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

3.What is the structure of the AIIMS 2012 paper?

The AIIMS 2012 paper on MARKS has 180 questions, organised by subject:

  • Botany: 26 questions - 26 single-correct.
  • Chemistry: 61 questions - 61 single-correct.
  • Physics: 60 questions - 60 single-correct.
  • Zoology: 33 questions - 33 single-correct.
4.What is the difficulty level of the AIIMS 2012 paper?

Each question on MARKS carries a difficulty rating. Of the 180 rated questions in this paper, 106 (59%) are easy, 37 (21%) are medium and 37 (21%) are hard. Subject wise:

  • Botany: 21 easy, 1 medium, 4 hard
  • Chemistry: 34 easy, 19 medium, 8 hard
  • Physics: 34 easy, 17 medium, 9 hard
  • Zoology: 17 easy, 0 medium, 16 hard
5.Which chapters had the most questions in the AIIMS 2012 paper?

The chapters with the most questions in each subject were:

  • Botany: Biodiversity and its Conservation (3), Cell Cycle and Cell Division (3), and Morphology of Flowering Plants (3).
  • Chemistry: p Block Elements (Group 15, 16, 17 & 18) (7), General Organic Chemistry (6), and Chemical Bonding and Molecular Structure (5).
  • Physics: Magnetic Effects of Current (7), Nuclear Physics (6), and Electrostatics (5).
  • Zoology: Chemical Coordination and Integration (4), Digestion and Absorption (3), and Human Health and Diseases (3).
6.Are there any out-of-syllabus questions in the AIIMS 2012 paper?

Yes. 45 of the 180 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 AIIMS 2012 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 AIIMS 2012 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 AIIMS. Repeating this with other papers shows whether the same weak spots keep coming back.