Official NEET UG 2013
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Question 1 of 180
1. Question
In Young’s double slit experiment, the slits are 2mm apart and are illuminated by photons of two wavelengths \(\lambda _1\)= 12000\(Å\) and \(\lambda _2\) = 10000\(Å\). At what minimum distance from the common central bright fringe on the screen 2m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other ?
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Question 2 of 180
2. Question
In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho and current gain 20, the voltage gain will be :
CorrectIncorrect -
Question 3 of 180
3. Question
A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 u. The energy liberated per u is : (given 1u = 931 MeV)
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Question 4 of 180
4. Question
In the given (V – T) diagram, what is the relation between pressure P\(_1\) and P \(_2\) ?
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Question 5 of 180
5. Question
The output (X) of the logic circuit shown in figure will be :
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Question 6 of 180
6. Question
Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2m? (g is the acceleration due to gravity)
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Question 7 of 180
7. Question
In a n-type semiconductor, which of the following statement is true:
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Question 8 of 180
8. Question
The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element ‘Y’ which is stable. The two elements ‘X’ and ‘Y’ were found to be in the ratio 1 : 7 in a sample of a given rock. The age of the rock is estimated to be:
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Question 9 of 180
9. Question
The molar specific heats of an ideal gas at constant pressure and volume are denoted by C\(_P\) and C\(_V\), respectively. If \( \gamma = \frac{C_P}{C_V}\) and R is the universal gas constant, then C\(_V\) is equal to :
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Question 10 of 180
10. Question
The wavelength \( \lambda _e\) of an electron and \(\lambda _P\) of a photon of same energy E are related by:
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Question 11 of 180
11. Question
Ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen spectrum is:-
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Question 12 of 180
12. Question
A current loop in a magnetic field :-
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Question 13 of 180
13. Question
A, B and C are three points in a uniform electric field. The electric potential is :-
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Question 14 of 180
14. Question
A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a massless string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is :-
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Question 15 of 180
15. Question
A wire of resistance 4\(\Omega \)is stretched to twice its original length. The resistance of stretched wire would be :-
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Question 16 of 180
16. Question
The velocity of a projectile at the initial point A is \((2 \hat{2} + 3\hat{j})\) m/s. It’s velocity (in m/s) at point B is :-
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Question 17 of 180
17. Question
A body of mass ‘m’ is taken from the earth’s surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be :-
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Question 18 of 180
18. Question
A stone falls freely under gravity. It covers distances h\(_1\), h\(_2\) and h\(_3\) in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h\(_1\), h\(_2\) and h\(_3\) is :-
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Question 19 of 180
19. Question
A bar magnet of length ‘\(l \)’ and magnetic dipole moment ‘M’ is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be
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Question 20 of 180
20. Question
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10\(\Omega \) is
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Question 21 of 180
21. Question
For photoelectric emission from certain metal the cutoff frequency is v. If radiation of frequency 2? impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron mass) :-
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Question 22 of 180
22. Question
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio of \(\frac{C_P}{C_V}\) for the gas is :-
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Question 23 of 180
23. Question
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied ?
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Question 24 of 180
24. Question
The resistances of the four arms P,Q, R and S in a Wheatstone’s bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the cell will be :-
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Question 25 of 180
25. Question
The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from T\(_1\) K to T\(_2\) K is :-
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Question 26 of 180
26. Question
A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using :-
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Question 27 of 180
27. Question
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Question 28 of 180
28. Question
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is :-
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Question 29 of 180
29. Question
An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 ms\(^{–1}\) and the second part of mass 2 kg moves with 8 ms\(^{–1}\) speed. If the third part files off with 4 ms\(^{–1}\) speed, then its mass is :-
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Question 30 of 180
30. Question
In an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quantity P is calculated as follows \( P = \frac{a^3 b^2}{cd}\) % error in P is :-
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Question 31 of 180
31. Question
The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of :
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Question 32 of 180
32. Question
Select the correct statement with respect to locomotion in humans:
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Question 33 of 180
33. Question
A phosphoglyceride is always made up of :
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Question 34 of 180
34. Question
Perisperm differs from endosperm in:
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Question 35 of 180
35. Question
A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :
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Question 36 of 180
36. Question
The cell-mediated immunity inside the human body is carried out by :
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Question 37 of 180
37. Question
Which of the following are likely to be present in deep sea water ?
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Question 38 of 180
38. Question
One of the representatives of Phylum Arthropoda is :
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Question 39 of 180
39. Question
Megasporangium is equivalent to :
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Question 40 of 180
40. Question
Kyoto Protocol was endorsed at :
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Question 41 of 180
41. Question
Figure shows human urinary system with structures labelled A to D. Select option which correctly identifies them and gives their characteristics and/ or functions.
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Question 42 of 180
42. Question
In china rose the flowers are :
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Question 43 of 180
43. Question
The Golgi complex plays a major role :
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Question 44 of 180
44. Question
What external changes are visible after the last moult of a cockroach nymph?
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Question 45 of 180
45. Question
Isogamous condition with non-flagallated gametes is found in
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Question 46 of 180
46. Question
Transition state structure of the substrate formed during an enzymatic reaction is
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Question 47 of 180
47. Question
Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom :
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Question 48 of 180
48. Question
The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of :
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Question 49 of 180
49. Question
Monoecious plant of Chara shows occurrence of :
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Question 50 of 180
50. Question
Advantage of cleistogamy is :-
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Question 51 of 180
51. Question
The H-zone in the skeletal muscle fibre is due to :
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Question 52 of 180
52. Question
Artificial insemination means :
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Question 53 of 180
53. Question
Which group of animals belong to the same phylum?
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Question 54 of 180
54. Question
Seed coat is not thin, membranous in :
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Question 55 of 180
55. Question
If two persons with ‘AB’ blood group marry and have sufficiently large number of children, these children could be classified as ‘A’ blood group : ‘AB’ blood group ‘B’ blood group in 1 : 2 : 1 ratio. Modern technique of protein electrophoresis reveals presence of both ‘A’ and ‘B’ type proteins in ‘AB’ blood group individuals. This is an example of
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Question 56 of 180
56. Question
Which of the following cannot be detected in a developing foetus by amniocentesis ?
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Question 57 of 180
57. Question
The first stable product of fixation of atmospheric nitrogen in leguminous plants is :
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Question 58 of 180
58. Question
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is :
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Question 59 of 180
59. Question
Secondary productivity is rate of formation of new organic matter by :
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Question 60 of 180
60. Question
Infection of Ascaris usually occurs by :
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Question 61 of 180
61. Question
A small object of uniform density rolls up a curved surface with an initial velocity ‘v’. It reaches upto a maximum height of \(\frac{3v^2}{4g}\) with respect to the initial position. The object is
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Question 62 of 180
62. Question
A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices \( \mu _1\) and \( \mu _2\) and R is the radius of curvature of the curved surface of the lenses, then the focal length of combination is
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Question 63 of 180
63. Question
A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statements is correct ?
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Question 64 of 180
64. Question
For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D. Using this information, the distance between the retina and the cornea -eye lens can be estimated to be –
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Question 65 of 180
65. Question
The upper half of an inclinded plane of inclination \(\theta \) is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient
of friction between the block and lower half of the plane is given by:-CorrectIncorrect -
Question 66 of 180
66. Question
A wave travelling in the +ve x-direction having displacement along y-direction as 1m, wavelength 2\( \pi \)m and frequency of \(\frac{1}{\pi}\) Hz is represented by :
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Question 67 of 180
67. Question
A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz, The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz, The unknown frequency is
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Question 68 of 180
68. Question
A coil is self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when :
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Question 69 of 180
69. Question
Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become :
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Question 70 of 180
70. Question
If we study the vibration of a pipe open at both ends, then the following statement is not true :
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Question 71 of 180
71. Question
When a proton is released from rest in a room, it starts with an initial acceleration a\(_0\) towards west. When it is projected towards north with a speed v\(_0\) it moves with an initial acceleration 3a\(_0\) towards west. The electric and magnetic fields in the room are:
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Question 72 of 180
72. Question
A wire loop is rotated in magnetic field. The frequency of change of direction of the induced e.m.f. is :
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Question 73 of 180
73. Question
A uniform force of (3\(\hat{i}\) + \(\hat{j}\)) newton acts on a particle of mass 2kg. Hence the particle is displaced from osition (2\(\hat{i}\) + \(\hat{k}\) ) meter to position (4\(\hat{i}\) + 3\(\hat{j}\) – \(\hat{k}\) ) meter. The work done by the force on the particle is :-
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Question 74 of 180
74. Question
The wettability of a surface by a liquid depends primarily on :-
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Question 75 of 180
75. Question
Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m, 4m, 8m, …., respectively, from the origin. The resulting gravitational potential due to this system at the origin will be :
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Question 76 of 180
76. Question
The value of Planck’s constant is 6.63 × 10\(^{-34}\) Js. The speed of light is 3 × 10\(^{17}\) nm s\(^{–1}\). Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 × 10\(^{15}\) s\(^{–1}\) ?
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Question 77 of 180
77. Question
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Question 78 of 180
78. Question
Which of the following is electron-deficient ?
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Question 79 of 180
79. Question
Which of the following statements about the interstitial compounds is incorrect?
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Question 80 of 180
80. Question
How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO\(_3\) ? The concentrated acid is 70% HNO\(_3\) ?
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Question 81 of 180
81. Question
Which of the following lanthanoid ions is diamagnetic?
(Atoms, Ce = 58, Sm = 62, Yb = 70)CorrectIncorrect -
Question 82 of 180
82. Question
Which one of the following molecules contains no \(\pi \) bond ?
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Question 83 of 180
83. Question
Based on equation E = –2.178 × 10\(^{–18}\) J \((\frac{Z^2}{n^2})\) certain conclusions are written. Which of them is not correct ?
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Question 84 of 180
84. Question
In the reaction
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Question 85 of 180
85. Question
The order of stability of the following tautomeric compounds is :-
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Question 86 of 180
86. Question
Nylon is an example of :-
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Question 87 of 180
87. Question
XeF\(_2\) is isostructural with :-
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Question 88 of 180
88. Question
The basic structural unit of silicates is :-
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Question 89 of 180
89. Question
Which of the following structure is similar to graphite?
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Question 90 of 180
90. Question
The structure of isobutyl group in an organic compound is :-
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Question 91 of 180
91. Question
The number of carbon atoms per unit cell of diamond unit cell is :-
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Question 92 of 180
92. Question
An excess of AgNO\(_3\) is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be :-
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Question 93 of 180
93. Question
What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ?
n = 3, l = 1 and , = –1CorrectIncorrect -
Question 94 of 180
94. Question
Which of these is not a monomer for a high molecular mass silicone polymer ?
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Question 95 of 180
95. Question
A reaction having equal energies of activation for forward and reverse reactions has :-
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Question 96 of 180
96. Question
At 25°C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm\(^{–1}\) cm\(^2\) mol\(^{–1}\) and at infinite dilution its molar conductance is 238 ohm\(^{–1}\) cm\(^2\) mol\(^{–1}\). The degree of ionisation of ammonium hydroxide at the same concentration and temperature is :-
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Question 97 of 180
97. Question
Structure of the compound whose IUPAC name is 3–Ethyl–2–hydroxy–4–methylhex–3–en–5–ynoic acid is :-
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Question 98 of 180
98. Question
Among the following ethers, which one will produce methyl alcohol on treatement with hot concentrated HI ?
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Question 99 of 180
99. Question
Antiseptics and disinfectants either kill or prevent growth of microganisms. Identify which of the following statements is not true :-
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Question 100 of 180
100. Question
A magnetic moment of 1.73 BM will be shown by one among the following :-
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Question 101 of 180
101. Question
KMnO\(_4\) can be prepared from K\(_2\)MnO\(_4\) as per the reaction:-
The reaction can go to compition by removing OH\(^–\) ions by addings :-
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Question 102 of 180
102. Question
Reaction by which Benzaldehyde cannot be prepared :-
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Question 103 of 180
103. Question
Which of the following does not give oxygen on heating ?
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Question 104 of 180
104. Question
A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72g cm\(^{–3}\). The molar mass of the metal is :-
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Question 105 of 180
105. Question
Dipole induced dipoloe interactions are present in which of the following pairs :-
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Question 106 of 180
106. Question
Figure shows schematic plan of blood circulation in humans with labels A to D, Identify the label and give its function/s.
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Question 107 of 180
107. Question
The tendency of population to remain in genetic equilibrium may be disturbed by :
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Question 108 of 180
108. Question
A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-D.
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Question 109 of 180
109. Question
A good producer of citric acid is :
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Question 110 of 180
110. Question
Age of a tree can be estimated by :
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Question 111 of 180
111. Question
The process by which organisms with different evolutionary history evolve similar phenotypic adaptation in response to a common environmental challenge, is called :
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Question 112 of 180
112. Question
A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characterstics.
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Question 113 of 180
113. Question
The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and/or characteristic :-
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Question 114 of 180
114. Question
Interfascicular cambium develops from the cells of:
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Question 115 of 180
115. Question
During seed germination its stored food is mobilized by :
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Question 116 of 180
116. Question
Roasting of sulphides gives the gas X as a by product. This is colourless gas with choking smel of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. It aqueous solution is acidic, acts as reducing agent and its acid has never been isolated. The gas X is :-
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Question 117 of 180
117. Question
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?
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Question 118 of 180
118. Question
Nitrobenzene on reaction with conc. HNO\(_3\)/H\(_2\)SO\(_4\) at 80-100°C forms which one of the following products ?
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Question 119 of 180
119. Question
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?
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Question 120 of 180
120. Question
Which of the following is a polar molecule ?
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Question 121 of 180
121. Question
A button cell used in watches function as following
Zn(s) + Ag\(_2\)O(s) + H\(_2\)O(\(l\)) \(\rightleftharpoons \) 2Ag(s) +
Zn\(^{2+}\)(aq) + 2OH\(^–\) (aq)If half cell potentials are
Zn\(^{2+}\)(aq) + 2e\(^–\) \(\to \) Zn(s); E\(^o\) = –0.76V
Ag\(_2\)O(s) + H\(_2\)O(\(l\)) + 2e\(^-\) \(\to \) 2Ag(s) + 2OH\(^-\) (aq);
E° = 0.34V
The cell potential will be :-CorrectIncorrect -
Question 122 of 180
122. Question
Which of these is least likely to act as a Lewis base?
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Question 123 of 180
123. Question
Which of the following compounds will not undergo Friedal-Craft’s reaction easily :-
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Question 124 of 180
124. Question
Which is the monomer of Neoprene in the following ?
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Question 125 of 180
125. Question
6.02 × 10\(^{20}\) molecules of urea are present in 100mL of its solution. The concentration of solution is :-
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Question 126 of 180
126. Question
Maximum deviation from ideal gas is expected from :
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Question 127 of 180
127. Question
Which of the following is paramagnetic ?
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Question 128 of 180
128. Question
Identify the correct order of solubility in aqueous medium :
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Question 129 of 180
129. Question
What is the activation energy for a reaction it its rate doubles when the temperature is raised from 20°C to 35°C ? (R = 8.314 J mol\(^{–1}\) K\(^{–1}\))
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Question 130 of 180
130. Question
Which is the strongest acid in the following ?
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Question 131 of 180
131. Question
Meiosis takes place in :
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Question 132 of 180
132. Question
According to Darwin, the organic evolution is due to :
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Question 133 of 180
133. Question
Which of the following criteria does not pertain to facillitated transport ?
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Question 134 of 180
134. Question
A major site for synthesis of lipids is :
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Question 135 of 180
135. Question
Natural reservoir of phosphorus is :
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Question 136 of 180
136. Question
Which of the metabolites is common to respiration- mediated breakdown of fats, carbohydrates and proteins ?
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Question 137 of 180
137. Question
Which one of the following processes during decomposition is correctly described ?
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Question 138 of 180
138. Question
If both parents are carriers for thalessemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
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Question 139 of 180
139. Question
Which of the following statements is not true of two genes that show 50% recombination frequency ?
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Question 140 of 180
140. Question
One of the legal methods of birth control is :
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Question 141 of 180
141. Question
Besides paddy fields, cyanobacteria are also found inside vegetative part of :
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Question 142 of 180
142. Question
Which of the following are correctly matched with respect to their taxonomic classification ?
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Question 143 of 180
143. Question
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as :
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Question 144 of 180
144. Question
Select the correct match of the digested products in humans given in with their absorption site and mechanism.
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Question 145 of 180
145. Question
Select the wrong statement :
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Question 146 of 180
146. Question
Which Mendelism idea is depicted by a cross in which the F\(_1\) generation resembles both the parents ?
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Question 147 of 180
147. Question
The diagram given here is the standard ECG of a normal person. The P- wave represents the :
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Question 148 of 180
148. Question
Which enzyme/s will be produced in a cell in which there is a nonsense mutation in the lac Y gene ?
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Question 149 of 180
149. Question
The most abundant intracellular cation is :
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Question 150 of 180
150. Question
Which one of the following is not the function of placenta ? It :-
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Question 151 of 180
151. Question
In plant breeding programme, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called :
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Question 152 of 180
152. Question
Which one of the following is not a correct statements ?
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Question 153 of 180
153. Question
Which one of the following organelle in the figure correctly matches with its function ?
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Question 154 of 180
154. Question
Which of the following represents maximum number of species among global biodiversity ?
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Question 155 of 180
155. Question
Which of the following Bt crops is being grown in India by the farmers ?
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Question 156 of 180
156. Question
Read the following statements (A – E) and answer the question which follows them.
(a) In liverworts, mosses and ferns gametophytes are free living
(b) Gymnosperms and some ferns are heterosporous
(c) Sexual reproduction in Fucus, Volvox and Allbugo is oogamous
(d) The sporophyte in liverworts is more elaborate than that in mosses
(E) Both, Pinus and Marchantia are dioecious
How many of the above statements are correct ?
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Question 157 of 180
157. Question
The essential chemical components of many coenzymes are :
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Question 158 of 180
158. Question
Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics:-
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Question 159 of 180
159. Question
The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products.
Arrow numberd 4, 8 and 12 can all be :
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Question 160 of 180
160. Question
Pigment-containing membranous extensions in some cyanobacteria are :
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Question 161 of 180
161. Question
Which one of the following statements is correct ?
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Question 162 of 180
162. Question
The characteristics and an example of a synovial joint in humans is :-
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Question 163 of 180
163. Question
The Air Prevention and Control of Pollution Act came into force in :
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Question 164 of 180
164. Question
Product of sexual reproduction generally generates:
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Question 165 of 180
165. Question
Among bitter gourd, mustard, brinjal, pumpkin chinarose, lupin, cucumber, sunnhemp, gram, guava, bean, chilli, plum, petunia, tomato, rose, withania, potato, onion, aloe and tulip how many plants have hypogynous flower ?
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Question 166 of 180
166. Question
A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of :
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Question 167 of 180
167. Question
Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
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Question 168 of 180
168. Question
Menstrual flow occurs due to lack of :
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Question 169 of 180
169. Question
Global warming can be controlled by :
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Question 170 of 180
170. Question
Which one of the following is not used for ex situ plant conservation ?
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Question 171 of 180
171. Question
During sewage treatment, biogases are produced which include :
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Question 172 of 180
172. Question
The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C :
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Question 173 of 180
173. Question
DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by :
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Question 174 of 180
174. Question
The complex formed by a pair of synapsed homologous chromosomes is called :
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Question 175 of 180
175. Question
The incorrec t statement with regard to Haemophilia is :
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Question 176 of 180
176. Question
Which of the following statements is correct in relation to the endocrine system ?
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Question 177 of 180
177. Question
Lenticels are involved in :
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Question 178 of 180
178. Question
Match the name of the animal (column I), with one characteristics (column II), and the phylum/class (column III) to which it belongs :
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Question 179 of 180
179. Question
What is the correct sequence of sperm formation?
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Question 180 of 180
180. Question
Macro molecule chitin is :
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