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NEET2019Paper 2019

NEET 2019 — Paper 2019

180 questions with step-by-step solutions. All free.

Physics

  1. Q1 When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + l). The elastic potential energy stored in the extended wire is : …
  2. Q2A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:
  3. Q3 Ionized hydrogen atoms and -particles with same momenta enters perpendicular to a constant magnetic field, B. The ratio of their radii of their paths rH : r will be : …
  4. Q4 Body A of mass 4m moving with speed u collides with another body B of mass 2m, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body A is : …
  5. Q5In which of the following devices, the eddy current effect is not used?
  6. Q6 In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1 m away, was found to be 0.2°. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water? (water = 4/3) …
  7. Q7 A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 × 10–2 N/m. The pressure inside the bubble equals at a point Z0 below the free surface of water in a container. Taking g = 10 m/s2, density of water = 103 kg/m3, the value of Z0 is : …
  8. Q8Which colour of the light has the longest wavelength?
  9. Q9 A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?  …
  10. Q10 The displacement of a particle executing simple harmonic motion is given by y = A0 + Asint + Bcost Then the amplitude of its oscillation is given by : …
  11. Q11The unit of thermal conductivity is :
  12. Q12Average velocity of a particle executing SHM in one complete vibration is :
  13. Q13For a p-type semiconductor, which of the following statements is true ? 
  14. Q14 Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be : …
  15. Q15A body weighs 200 N on the surface of the earth. How much will it weigh half way down to the centre of the earth ?
  16. Q16Pick the wrong answer in the context with rainbow.
  17. Q17 A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is : (Cu = 1.7 × 10–5 K–1 and Al = 2.2 × 10–5 K–1) …
  18. Q18An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, (nearly) : (me = 9 × 10–31 kg)
  19. Q19Increase in temperature of a gas filled in a container would lead to :
  20. Q20 Two similar thin equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F1 . When the space between the two lenses is filled with glycerine (which has the same refractive index ( = 1.5) as that of glass) then the equivalent focal length is F2 . The ratio F1 : F2 will be : …
  21. Q21 When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60° with horizontal, it can travel a distance x1 along the plane. But when the inclination is decreased to 30° and the same object is shot with the same velocity, it can travel x 2 distance. Then x1 : x2 will be: …
  22. Q22The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth, is:
  23. Q23 In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction? …
  24. Q24The total energy of an electron in an atom in an orbit is –3.4 eV. Its kinetic and potential energies are, respectively:
  25. Q25 At a point A on the earth’s surface the angle of dip, = +25°. At a point B on the earth’s surface the angle of dip, = –25°. We can interpret that: …
  26. Q26A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre
  27. Q27In the circuits shown below, the readings of voltmeters and the ammeters will be
  28. Q28Which of the following acts as a circuit protecting device?
  29. Q29 A force F = 20 + 10 y acts on a particle in ydirection where F is in newton and y in meter. Work done by this force to move the particle from y = 0 to y = 1 m is …
  30. Q30 A solid cylinder of mass 2 kg and radius 4 cm rotating about its axis at the rate of 3 rpm. The torque required to stop after 2 revolutions is …
  31. Q31In which of the following processes, heat is neither absorbed nor released by a system?
  32. Q32The correct Boolean operation represented by the circuit diagram drawn is :
  33. Q33 A small hole of area of cross-section 2 mm2 is present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m/s2, the rate of flow of water through the open hole would be nearly …
  34. Q34 Two point charges A and B, having charges +Q and –Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes : …
  35. Q35 Two parallel infinite line charges with linear charge densities +  C/m and – C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges? …
  36. Q36 A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be :
  37. Q37 Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed vA and vB respectively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be : …
  38. Q38A particle moving with velocity is acted by three forces shown by the vector triangle PQR. The velocity of the particle will :
  39. Q39 The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s and is flowing due east. If he is standing on the south bank and wishes to cross the river along the shortest path the angle at which he should make his strokes w.r.t. north is given by : …
  40. Q40-particle consists of :
  41. Q41 A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field. B with the distance d from the centre of the conductor, is correctly represented by the figure : …
  42. Q42 In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4% respectively. Then the maximum percentage of error in the measurement X, where
  43. Q43 A parallel plate capacitor of capacitance 20 F is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively. …
  44. Q44 The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the fig. y - projection of the radius vector of rotating particle P is : …
  45. Q45 A 800 turn coil of effective area 0.05 m2 is kept perpendicular to a magnetic field 5 × 10–5 T. When the plane of the coil is rotated by 90° around any of its coplanar axis in 0.1 s, the emf induced in the coil will be: …

Chemistry

  1. Q1 A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is : …
  2. Q2In which case change in entropy is negative? 
  3. Q3Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?
  4. Q4The method used to remove temporary hardness of water is : 
  5. Q5Which one is malachite from the following? 
  6. Q6If the rate constant for a first order reaction is k, the time (t) required for the completion of 99% of the reaction is given by:
  7. Q7pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp ) of Ca(OH)2 is: 
  8. Q8The non-essential amino acid among the following is: 
  9. Q9The biodegradable polymer is:
  10. Q10For the second period elements the correct increasing order of first ionisation enthalpy is:
  11. Q11Which of the following diatomic molecular species has only bonds according to Molecular Orbital Theory? 
  12. Q12 Match the following : (a) Pure nitrogen           (i) Chlorine (b) Haber process         (ii) Sulphuric acid (c) Contact process      (iii)Ammonia (d) Deacon’s process   (iv) Sodium azide or Barium azide Which of the following is the correct option? …
  13. Q13Which of the following is incorrect statement? 
  14. Q14Which is the correct thermal stability order for H­2 E (E = O, S, Se, Te and Po)? 
  15. Q15The most suitable reagent for the following conversion, is :
  16. Q16Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is : 
  17. Q17 For the cell reaction
  18. Q18 Among the following, the one that is not a green house gas is 
  19. Q19 Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is (Given that 1 L bar = 100 J)  …
  20. Q20 Which of the following reactions are disproportionation reaction? (1)
  21. Q21 4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is 
  22. Q22The correct structure of tribromooctaoxide is
  23. Q23The structure of intermediate A in the following reaction, is
  24. Q24The number of sigma () and pi () bonds in pent-2-en-4-yne is
  25. Q25 An alkene "A" on reaction with O3 and Zn–H2 O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene "A" gives "B" as the major product. The structure of product "B" is:  …
  26. Q26Among the following, the narrow spectrum antibiotic is :
  27. Q27Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]l– sol ?
  28. Q28Conjugate base for acids H2 O and HF are :
  29. Q29For an ideal solution, the correct option is :
  30. Q30The compound that is most difficult to protonate is :
  31. Q31The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is : 
  32. Q32For the chemical reaction The correct option is:
  33. Q33The mixture that forms maximum boiling azeotrope is: 
  34. Q34Among the following, the reaction that proceeds through an electrophilic substitution, is : 
  35. Q35 A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :  …
  36. Q36Which of the following is an amphoteric hydroxide?
  37. Q37 For a cell involving one electron
  38. Q38Which of the following species is not stable?
  39. Q39The manganate and permanganate ions are tetrahedral, due to : 
  40. Q40Match the Xenon compounds in 
  41. Q41The major product of the following reaction is :
  42. Q42Which will make basic buffer? 
  43. Q43What is the correct electronic configuration of the central atom in K4 [Fe(CN)6 ] based on crystal field theory? 
  44. Q44Identify the incorrect statement related to PCl5 from the following:
  45. Q45The correct order of the basic strength of methyl substituted amines in aqueous solution is : 

Biology

  1. Q1 Consider following features (a) Organ system level of organisation (b) Bilateral symmetry (c) True coelomates with segmentation of body Select the correct option of animal groups which possess all the above characteristics …
  2. Q2Which part of the brain is responsible for thermoregulation?
  3. Q3Which of the following is the most important cause for animals and plants being driven to extinction?
  4. Q4 Match the following structures with their respective location in organs (a) Crypts of Lieberkuhn
  5. Q5Which of the following is a commercial blood cholesterol lowering agent?
  6. Q6Respiratory Quotient (RQ) value of tripalmitin is.
  7. Q7The shorter and longer arms of a submetacentric chromosome are referred to as
  8. Q8Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following
  9. Q9 Colostrum the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains. …
  10. Q10The Earth Summit held in Rio de Janeiro in 1992 was called
  11. Q11Which of the following statements is not correct?
  12. Q12How does steroid hormone influence the cellular activities?
  13. Q13The correct sequence of phases of cell cycle is.
  14. Q14 In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place? …
  15. Q15Which one of the following is not a method of in situ conservation of biodiversity?
  16. Q16Match the Column-I with Column-II Select the correct option.
  17. Q17The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in.
  18. Q18Which of the following muscular disorders is inherited?
  19. Q19Which of the following pairs of gases is mainly responsible for green house effect?
  20. Q20Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth
  21. Q21 Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to …
  22. Q22Which of the following pair of organelles does not contain DNA?
  23. Q23Variations caused by mutation, as proposed by Hugo de Vries are
  24. Q24 Match the hominids with their correct brain size : (a) Homo habilis
  25. Q25Select the correct sequence for transport of sperm cells in male reproductive system.
  26. Q26Purines found both in DNA and RNA are.
  27. Q27 Consider the following statement : (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option. …
  28. Q28Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?
  29. Q29Concanavalin A is.
  30. Q30Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?
  31. Q31 What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL? …
  32. Q32What map unit (Centimorgan) is adopted in the construction of genetic maps?
  33. Q33Persistent nucellus in the seed is known as
  34. Q34In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as
  35. Q35What is the direction of movement of sugars in phloem?
  36. Q36 Match the following organisms with the products they produce (a) Lactobacillus
  37. Q37Select the incorrect statement.
  38. Q38Select the correct group of biocontrol agents.
  39. Q39DNA precipitation out of a mixture of biomolecules can be achieved by treatment with
  40. Q40Select the incorrect statement.
  41. Q41Which of the following contraceptive methods do involve a role of hormone?
  42. Q42Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
  43. Q43Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is
  44. Q44Which of the following ecological pyramids is generally inverted?
  45. Q45Which of the statements given below is not true about formation of Annual Rings in trees?
  46. Q46Cell in G0 phase :
  47. Q47Xylem translocates.
  48. Q48Which of the following statements regarding mitochondria is incorrect?
  49. Q49Which of the following factors is responsible for the formation of concentrated urine?
  50. Q50Thiobacillus is a group of bacteria helpful in carrying out
  51. Q51Select the hormone-releasing Intra-Uterine Devices.
  52. Q52Drug called ‘Heroin’ is synthesized by
  53. Q53Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by
  54. Q54 In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following : …
  55. Q55 From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in …
  56. Q56Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.
  57. Q57Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus
  58. Q58What is the site of perception of photoperiod necessary for induction of flowering in plants?
  59. Q59What is the fate of the male gametes discharged in the synergid?
  60. Q60 Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL, respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL? …
  61. Q61 Match Column - I with Column - II Column - I
  62. Q62Which is of the following statements is incorrect?
  63. Q63Expressed Sequence Tags (ESTs) refers to :
  64. Q64 Match the following organisms with their respective characteristics : (a) Pila
  65. Q65Which of the following statements is incorrect?
  66. Q66Which of the following sexually transmitted diseases is not completely curable?
  67. Q67Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?
  68. Q68Pinus seed cannot germinate and established without fungal association. This is because :
  69. Q69Which of the following is true for Golden rice?
  70. Q70 A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population? …
  71. Q71Phloem in gymnosperms lacks :
  72. Q72Which of the following can be used as a biocontrol agent in the treatment of plant disease?
  73. Q73Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes.
  74. Q74 It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield? …
  75. Q75 Match the following genes of the Lac operon with their respective products : (a) i gene
  76. Q76The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :
  77. Q77Which of the following statements is correct?
  78. Q78 Use of an artificial kidney during hemodialysis may result in : (a) Nitrogenous waste build-up in the body (b) Non-elimination of excess potassium ions (c) Reduced absorption of calcium ions from gastro-intestinal tract (d) Reduced RBC production Which of the following options is the most appropriate? …
  79. Q79Which of the following immune responses is responsible for rejection of kidney graft?
  80. Q80Which of the following glucose transporters is insulin-dependent?
  81. Q81Select the correct option.
  82. Q82 Match the following hormones with the respective disease (a) Insulin
  83. Q83Which of these following methods is the most suitable for disposal of nuclear waste?
  84. Q84Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for
  85. Q85What is the genetic disorder in which an individual has an overall masculine development gynaecomastia and is sterile?
  86. Q86Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
  87. Q87What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
  88. Q88The concept of “Omnis cellula-e cellula” regarding cell division was first proposed by
  89. Q89Under which of the following conditions will there be no change in the reading frame of following mRNA? 5AACAGCGGUGCUAUU3
  90. Q90Extrusion of second polar body from egg nucleus occurs :

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