Official NEET UG 2017
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Question 1 of 120
1. Question
A spring of force constant k is cut into lengths of ratio 1 : 2 : 3. They are connected in series and the new force constant is k’. Then they are connected in parallel and force constant is {k}” . Then k’ : {k}” is : –
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Question 2 of 120
2. Question
The ratio of resolving powers of an optical microscope for two wavelengths
\(\lambda _1\) =4000 \(Å\) and \(\lambda\) \(_2\) = 6000 \(Å\) is:-
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Question 3 of 120
3. Question
The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?
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Question 4 of 120
4. Question
Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m/s. Take ‘g’ constant with a value 10 m/s2 . The work done by the (i) gravitational force and the (ii) resistive force of air is :-
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Question 5 of 120
5. Question
A physical quantity of the dimensions of length that can be formed out of c, G and \(\frac{e^{2}}{4\pi \varepsilon _{0}}\) is [c is velocity of light, G is universal constant of gravitation and e is charge] :-
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Question 6 of 120
6. Question
Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are \(K_{1}\) and \(K_{1}\). The thermal conductivity of the composite rod will be:
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Question 7 of 120
7. Question
A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system :-
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Question 8 of 120
8. Question
In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is \(3k\Omega \). If current gain is 100 and the base resistance is \(2k\Omega \), the voltage and power gain of the amplifier is :-
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Question 9 of 120
9. Question
Thermodynamic processes are indicated in the following diagram
Match the following
Sort elements
- Isochoric
- Adiabatic
- Isothermal
- Isobaric
-
P. Process I
-
Q. Process II
-
R. Process III
-
S. Process IV
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Question 10 of 120
10. Question
Suppose the charge of a proton and an electron differ slightly. One of them is – e, the other is \((e+\Delta e)\). If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then \(\Delta e\) is of the order of [Given mass of hydrogen\( m_{h}=1.67\times 10^{-27}kg]\)
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Question 11 of 120
11. Question
The resistance of a wire is ‘R’ ohm. If it is melted and stretched to ‘n’ times its original length, its new resistance will be :-
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Question 12 of 120
12. Question
The given electrical network is equivalent to :
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Question 13 of 120
13. Question
The de-Broglie wavelength of a neutron in therma lequilibrium with heavy water at a temperature T (Kelvin) and mass m, is:-
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Question 14 of 120
14. Question
Which one of the following represents forward bias diode ?
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Question 15 of 120
15. Question
A long solenoid of diameter 0.1 m has 2 × 10\(^{4}\) turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0A from 4 A in 0.05 s. If the resistance of the coil is 10\(\pi ^{2}\Omega \). the total charge flowing through the coil during this time is:-
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Question 16 of 120
16. Question
Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time \(t_{1}\) . On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time \(t_{2}\). The time taken by her to walk up on the moving escalator will be
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Question 17 of 120
17. Question
Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that 8\(^{th}\) bright fringe in the medium lies where 5\(^{th}\) dark fringe lies in air. The refractive index of the medium is nearly :-
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Question 18 of 120
18. Question
A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source I. When the mirror is rotated through a small angle q, the spot of the light is found to move through a distance y on the scale. The angle \(\theta \) is given by :-
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Question 19 of 120
19. Question
If \(\theta _1\) and \(\theta _2\) be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip \(\theta\) is given by
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Question 20 of 120
20. Question
Tow cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340 m/s] :-
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Question 21 of 120
21. Question
Two blocks A and B of masses 3 m and m respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively :
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Question 22 of 120
22. Question
A thin prism having refracting angle 10° is made of glass of refractive index 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be :-
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Question 23 of 120
23. Question
The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then :-
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Question 24 of 120
24. Question
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves :-
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Question 25 of 120
25. Question
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be :-
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Question 26 of 120
26. Question
Figure shows a circuit that contains three identical resistors with resistance R = 9.0 \( \Omega \) each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf \(\varepsilon\) = 18 V. The current ‘i’ through the battery just after the switch closed is,…… :-
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Question 27 of 120
27. Question
Radioactive material ‘A’ has decay constant \( ‘8\lambda’\)and material ‘B’ has decay constant \( ‘\lambda’\). Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material ‘B’ to that ‘A’ will be\( \frac{1}{e}\)
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Question 28 of 120
28. Question
The diagrams below show regions of equipotentials:-
A positive charge is moved from A to B in each diagram.
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Question 29 of 120
29. Question
Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will :-
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Question 30 of 120
30. Question
The x and y coordinates of the particle at any time are x = 5t – 2t\(^{2}\) and y = 10t respectively, where x and y are in meters and t in seconds. The acceleration of the particle at t = 2s is :
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Question 31 of 120
31. Question
One end of string of length l is connected to a particle of mass ‘m’ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed ‘v’ the net force on the particle (directed towards centre) will be (T represents the tension in the string) :-
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Question 32 of 120
32. Question
A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is :-
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Question 33 of 120
33. Question
Two Polaroids P\(_{1}\) andP\(_{2}\) are placed with their axis perpendicular to each other.Unpolarised light\( I_{0}\) is incident on \(P_{1}\). A third polaroid \( P_{3} \) is kept in between \(P_{1}\) and \(P_{2} \) such that its axis makes an angle 45° with
that of P\(_{1}\) . The intensity of transmitted light through P\(_{2}\) is :-CorrectIncorrect -
Question 34 of 120
34. Question
The bulk modulus of a spherical object is ‘B’. If it is subjected to uniform pressure ‘p’, the fractional decrease in radius is :-
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Question 35 of 120
35. Question
In an electromagnetic wave in free space the root mean square value of the electric field is \(E_{rms}\) = 6V/m. The peak value of the magnetic field is :-
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Question 36 of 120
36. Question
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N ?
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Question 37 of 120
37. Question
Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities \(\omega _{1}\) and \(\omega _{2}\) . They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:-
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Question 38 of 120
38. Question
The photoelectric threshold wavelength of silver is 3250 × 10\(^{-10}\)m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 × 10\(^{-10}\) m is :-
(Given) h = 4.14 × 10\(^{-15}\) eVs and c = 3 × 10\(^{8}\) ms\(^{-1}\)
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Question 39 of 120
39. Question
A 250-Turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 µA and subjected to magnetic field of strength 0.85 T. Work done for rotating the coil by 180º against the torque is:-
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Question 40 of 120
40. Question
The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is :-
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Question 41 of 120
41. Question
A carnot engine having an efficiency of\( (\frac{1}{10})\). as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is :-
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Question 42 of 120
42. Question
A gas mixture consists of 2 moles of O\(_{2}\) and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is :-
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Question 43 of 120
43. Question
An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current ‘I along the same direction is shown in fig. Magnitude of force per unit length on the middle wire ‘B’ is given by :-
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Question 44 of 120
44. Question
A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is :-
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Question 45 of 120
45. Question
Which of the following statements are correct ?
(a) Centre of mass of a body always coincides with the centre of gravity of the body
(b) Central of mass of a body is the point at which the total gravitational torque on the body is zero
(c) A couple on a body produce both translational and rotation motion in a body
(d) Mechanical advantage greater than one means that small effort can be used to lift a large load
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Question 46 of 120
46. Question
Which one of the following statements is correct, with reference to enzymes ?
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Question 47 of 120
47. Question
A decrease in blood pressure / volume will not cause the release of :
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Question 48 of 120
48. Question
Which cells of “Crypts of Lieberkuhn” secrete antibacterial lysozyme ?
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Question 49 of 120
49. Question
Which of the following are not polymeric ?
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Question 50 of 120
50. Question
Functional megaspore in an angiosperm develops into ?
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Question 51 of 120
51. Question
Myelin sheath is produced by :
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Question 52 of 120
52. Question
Attractants and rewards are required for :
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Question 53 of 120
53. Question
Receptor sites for neurotransmitters are present on :
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Question 54 of 120
54. Question
Coconut fruit is a :
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Question 55 of 120
55. Question
Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature ?
(a) They do not need to reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen transportCorrectIncorrect -
Question 56 of 120
56. Question
Capacitation occurs in :
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Question 57 of 120
57. Question
Which of the following are found in extreme saline conditions ?
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Question 58 of 120
58. Question
Asymptote in a logistic growth curve is obtained when :
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Question 59 of 120
59. Question
Artificial selection to obtain cows yielding higher milk output represents :
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Question 60 of 120
60. Question
Select the mismatch :
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Question 61 of 120
61. Question
Good vision depends on adequate intake of carotene rich food :
Select the best option from the following statements :(a) Vitamin A derivatives are formed from carotene
(b) The photopigments are embedded in the membrane discs of the inner segment
(c) Retinal is a derivative of Vitamin A
(d) Retinal is a light absorbing part of all the visual photopigmentsCorrectIncorrect -
Question 62 of 120
62. Question
The DNA fragments separated on an agarose gel can be visualised after staining with :
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Question 63 of 120
63. Question
The hepatic portal vein drains blood to liver from :
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Question 64 of 120
64. Question
The vascular cambium normally gives rise to :
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Question 65 of 120
65. Question
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement :
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Question 66 of 120
66. Question
The genotypes of a husband and Wife are I\(^A\) I\(^B\) and \(^A\)i Among the blood types of their children, how many different genotypes and phenotypes are possible?
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Question 67 of 120
67. Question
Which of the following facilitates opening of stomatal aperture ?
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Question 68 of 120
68. Question
In Bougainvillea thorns are the modifications of :
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Question 69 of 120
69. Question
Which one of the following is related to Ex-situ conservation of threatened animals and plants ?
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Question 70 of 120
70. Question
Root hairs develop from the region of :
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Question 71 of 120
71. Question
A disease caused by an autosomal primary non- disjunction is :
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Question 72 of 120
72. Question
The water potential of pure water is :
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Question 73 of 120
73. Question
Which of the following options gives the correct sequence of events during mitosis ?
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Question 74 of 120
74. Question
The process of separation and purification of expressed protein before marketing is called :
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Question 75 of 120
75. Question
A temporary endocrine gland in the human body is :
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Question 76 of 120
76. Question
Which of the following is made up of dead cells?
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Question 77 of 120
77. Question
An example of colonial alga is :
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Question 78 of 120
78. Question
Match the following sexually transmitted diseases (Column-I) with their causative agent (Column-II) and select the correct option :
Sort elements
- Neisseria
- Treponema
- Human papilloma-Virus
- HIV
-
Gonorrhea
-
Syphilis
-
Genital Warts
-
AIDS
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Question 79 of 120
79. Question
The function of copper ions in copper releasing IUD’s is :
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Question 80 of 120
80. Question
Which of the following in sewage treatment removes suspended solids ?
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Question 81 of 120
81. Question
An important characteristic that Hemichordates share with Chordates is
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Question 82 of 120
82. Question
The final proof for DNA as the genetic material came from the experiments of :
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Question 83 of 120
83. Question
Among the following characters, which one was not considered by Mendel in his experiments on pea ?
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Question 84 of 120
84. Question
Plants which produce characteristic pneumatophores and show vivipary belong to :
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Question 85 of 120
85. Question
The pivot joint between atlas and axis is a type of :
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Question 86 of 120
86. Question
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ?
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Question 87 of 120
87. Question
DNA fragments are:
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Question 88 of 120
88. Question
Which of the following components provides sticky character to the bacterial cell ?
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Question 89 of 120
89. Question
Which of the following options best represents the enzyme composition of pancreatic juice ?
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Question 90 of 120
90. Question
Which among these is the correct combination of aquatic mammals ?
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Question 91 of 120
91. Question
Fruit and leaf drop at early stages can be prevented by the application of:
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Question 92 of 120
92. Question
Select the correct route for the passage of sperms in male frogs:
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Question 93 of 120
93. Question
In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation ?
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Question 94 of 120
94. Question
Which ecosystem has the maximum biomass ?
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Question 95 of 120
95. Question
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:
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Question 96 of 120
96. Question
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in:
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Question 97 of 120
97. Question
Which of the following statements is correct ?
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Question 98 of 120
98. Question
Alexander Von Humbolt described for the first time:
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Question 99 of 120
99. Question
Zygotic meiosis is characteristic of;
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Question 100 of 120
100. Question
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?
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Question 101 of 120
101. Question
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
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Question 102 of 120
102. Question
Transplantation of tissues/organs fails often due to non-acceptance by the patient’s body. Which type of immune-response is responsible for such rejections ?
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Question 103 of 120
103. Question
Life cycle of Ectocarpus and Fucus respectively are:
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Question 104 of 120
104. Question
A gene whose expression helps to identify transformed cell is known as :
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Question 105 of 120
105. Question
A dioecious flowering plant prevents both :
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Question 106 of 120
106. Question
Which statement is wrong for Krebs’ cycle ?
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Question 107 of 120
107. Question
Phosphoenol pyruvate (PEP) is the primary CO\(_2\) acceptor in:
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Question 108 of 120
108. Question
During DNA replication, Okazaki fragments are used to elongate:
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Question 109 of 120
109. Question
Which of the following RNAs should be most abundant in animal cell ?
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Question 110 of 120
110. Question
GnRH, a hypothalamic hormone, needed in reproduction, acts on:
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Question 111 of 120
111. Question
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Question 112 of 120
112. Question
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Question 113 of 120
113. Question
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Question 114 of 120
114. Question
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Question 115 of 120
115. Question
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Question 116 of 120
116. Question
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Question 117 of 120
117. Question
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Question 118 of 120
118. Question
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Question 119 of 120
119. Question
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Question 120 of 120
120. Question
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