Official NEET UG 2008 Test
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Question 1 of 76
1. Question
A particle of mass m is projected with velocity v making an angle of 45º with the horizontal from level ground. When the particle lands on the level ground the magnitude of the change in its momentum will be –
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Question 2 of 76
2. Question
A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is\( 4\times 10^{–3}\) Wb. The selfinductance of the solenoid is –
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Question 3 of 76
3. Question
A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction \(\vec {B}\) . After 3 seconds the kinetic energy of the particle will be –
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Question 4 of 76
4. Question
The distance travelled by a particle starting from rest and moving with an acceleration\(\frac{4}{3} ms^{–2}\), in the third second is –
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Question 5 of 76
5. Question
A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of\( 3 \times 10^{6}] ms^{–1}.\)The velocity of the particle is :(mass of electron =\( 9.1 \times 10^{–31}\)kg)
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Question 6 of 76
6. Question
Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be –
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Question 7 of 76
7. Question
A thin conducting ring of radius R is given a charge + Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is –
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Question 8 of 76
8. Question
Two nuclei have their mass numbers in the ratio of 1 : 3. The ratio of their nuclear densities would be –
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Question 9 of 76
9. Question
If M\( (A, Z), M_{p}\) and Mn denote the masses of the nucleus X , proton and neutron respectively in units of u \((1 u = 931.5 MeV/C^{2})\) and BE represents its bonding energy in MeV, then –
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Question 10 of 76
10. Question
A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 \(ms^{–1} to 20 ms^{–1}\) while passing through a distance 135 m in t second. The value of t is –
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Question 11 of 76
11. Question
A particle shows distancetime curve as given in this figure. The maximum instantaneous velocity of the particle is around the point :
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Question 12 of 76
12. Question
An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature\(20^{º}C ?\) The temperature of boiling water is 100ºC.
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Question 13 of 76
13. Question
In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of –
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Question 14 of 76
14. Question
The circuit is equivalent to –
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Question 15 of 76
15. Question
If the error in the measurement of radius of a sphere is 2 % then the error in the determination of volume of the sphere will be –
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Question 16 of 76
16. Question
A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is \(90^{º}\). The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is –
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Question 17 of 76
17. Question
A pn photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly :
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Question 18 of 76
18. Question
Two periodic waves of intensities I1 and I2 pass through a region at the same time in the same direction. the sum of the maximum and minimum intensities is –
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Question 19 of 76
19. Question
If Q, E and W denote respectively the heat added, change in internal energy and the work done by a closed cycle process, then :
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Question 20 of 76
20. Question
In the circuit shown, the current through the\( 4\Omega\) resistor is 1 amp when the points P and M are connected to a D.C. voltage source. The potential difference between the points M and N is –
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Question 21 of 76
21. Question
On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are\( 39^{º}\) W and\( 239^{º}\) W respectively. What will be the temperature on the new scale, corresponding to a temperature of \(39^{º}\)C on the Celsius scale ?
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Question 22 of 76
22. Question
The wave described by \(y = 0.25 sin (10\pi x – 2 \pi f),\) where x and y are in metres and t in seconds, is a wave travelling along the –
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Question 23 of 76
23. Question
The electric potential at a point in free space due to a charge \(Q coulomb is Q \times 10^{11}\) volts. The electric field at that point is –
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Question 24 of 76
24. Question
The velocity of electromagnetic radiation in a medium of permittivity\( \varepsilon _{0}\) and permeability\( \mu_{0}\) is given by :
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Question 25 of 76
25. Question
Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 sec and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of two points ?
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Question 26 of 76
26. Question
Two simple Harmonic Motions of angular frequency 100 and 1000 rad\( s^{–1}\) have the same displacement amplitude. The ratio of their maximum accelerations is –
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Question 27 of 76
27. Question
If the lattice parameter for a crystalline structure is 3.6 , then the atomic radius in fcc crystal is –
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Question 28 of 76
28. Question
Water falls from a height of 60 m at the rate of15 kg/s to operate a turbine. The losses due to frictional forces are 10 % of energy. How much power is generated by the turbine ? \((g = 10 m/s^{2})\)
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Question 29 of 76
29. Question
The energy required to charge a parallel plate condenser of plate separation d and plate area of crosssection A such that the uniform electric field between the plates is E, is :
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Question 30 of 76
30. Question
A boy is trying to start a fire by focusing Sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the Sun is\( 1.39 \times 10^{9}\) m and its mean distance from the earth is\( 1.5 \times 10^{11} m\). What is the diameter of the Sun’s image on the paper ?
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Question 31 of 76
31. Question
A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are\( F_{1}, F_{2} and F_3\) respectively and are in the plane of the paper and along the directions shown, the forceon the segment QP is :
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Question 32 of 76
32. Question
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively –
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Question 33 of 76
33. Question
Curie temperature is the temperature above which –
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Question 34 of 76
34. Question
Which two of the following five physical parameters have the same dimensions ?
(a) Energy density
(b) Refractive index
(c) Dielectric constant
(d) Young’s modulus
(e) Magnetic field
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Question 35 of 76
35. Question
The ground state energy of hydrogen atom is –13.6 eV. When its electron is in the first excited state, its excitation energy is –
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Question 36 of 76
36. Question
The voltage gain of an amplifier with 9 % negative feedback is 10. The voltage gain without feedback will be –
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Question 37 of 76
37. Question
A galvanometer of resistance\( 50 \Omega\) is connected to a battery of 3V along with a resistance of\( 2950 \Omega\) in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be –
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Question 38 of 76
38. Question
A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is –
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Question 39 of 76
39. Question
In an A.C. circuit the emf (e) and the current (i) at any instant are given respectively by:
\(e =E_{0} sin \omega{t}\)
\(i = I_{0} sin (\omega{t} \phi)\)
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Question 40 of 76
40. Question
Three forces acting on a body are shown in the figure. To have the resultant force only along the ydirection, the magnitude of the minimum additional force needed is –
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Question 41 of 76
41. Question
A current of 3 amp. flows through the\( 2\Omega\) resistor shown in the circuit. The power dissipated in the \( 5\Omega\) resistor is –
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Question 42 of 76
42. Question
Two radioactive materials\( X_{1} and X_{2}\) have decay constants\( 5\lambda and \lambda\) respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of \(X_{1}\) to that of\( X_{2}\) will be \(\frac{1}{e}\) after a time –
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Question 43 of 76
43. Question
The work function of a surface of a photosensitive material is 6.2 eV. The wavelength of the incident radiation for which the stopping potential is 5 V lies in the :
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Question 44 of 76
44. Question
A point performs simple harmonic oscillation of period T and the equation of motion is given by x = a sin \((\omega t + \pi/6)\). After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity ?
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Question 45 of 76
45. Question
Two thin lenses of focal lengths f1 and f2 are in contact and coaxial. The power of the combination is –
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Question 46 of 76
46. Question
At \(10^{º}C\) the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At\( 110^{º}\)C this ratio is –
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Question 47 of 76
47. Question
A roller coaster is designed such that riders experience “weightlessness” as they go round the top of a hill whose radius of curvature is 20m. The speed of the car at the top of the hill is between –
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Question 48 of 76
48. Question
A circular disc of radius 0.2 metre is placed in a uniform magnetic field of induction\(\frac{1}{\pi} (\frac{Wb}{m^{2}})\) in such a way that its axis makes an angle of\( 60^{º}\) with\( \vec {B}.\) The magnetic flux linked with the disc is –
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Question 49 of 76
49. Question
The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius around their respective axes is –
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Question 50 of 76
50. Question
A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of \(10 \Omega\). Its internal resistance is –
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Question 51 of 76
51. Question
Which one of the following arrangements does not give the correct picture of the trends indicated against it ?
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Question 52 of 76
52. Question
If a gas expands at constant temperature, it indicates that :
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Question 53 of 76
53. Question
The dissociation equilibrium of a gas AB2 can be represented as :\(2AB_{2}(g) \rightleftharpoons 2 AB(g) + B_{2}(g)\) The degree of dissociation is ‘x’ and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant \(K_{p}\) and total pressure P is –
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Question 54 of 76
54. Question
The bromination of acetone that occurs in acid solution is represented by this equation. \(CH_{3}COCH_{3}(aq.) + Br_{2}(aq.) \to CH_{3}COCH_{2}Br(aq.) + H^{+} (aq.) + Br^{} (aq.)\) These kinetic data were obtained from given reaction concentrations.
Initial rate, disappearance of\( Br_{2}, Ms^{–1}\)
\(5.7 \times 10^{5}\)
\(5.7 \times 10^{5}\)
\(1.2 \times 10^{4}\)
\(3.1 \times 10^{4}\)
Based on these data, the rate equation is :
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Question 55 of 76
55. Question
If the concentration of OH– ions in the reaction,\(Fe(OH)_{3}(s) \rightleftharpoons Fe^{3+} (aq.) + 3OH^{} (aq.) is decreased by[latex]\frac{1}{4}\) times, then equilibrium concentration of\( Fe^{3+}\) will increase by –
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Question 56 of 76
56. Question
What volume of oxygen gas \((O_{2})\) measured at \(0^{º}\)C and 1 atm, is needed to burn completely one litre, of propane gas\( (C_{3}H_{8})\) measured under the same conditions ?
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Question 57 of 76
57. Question
Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the \(H^{+}\) ion concentration in the mixture ?
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Question 58 of 76
58. Question
The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of –
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Question 59 of 76
59. Question
In DNA, the complementary bases are –
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Question 60 of 76
60. Question
Base strength of –
(i)\( H_{3} C \Theta ^{CH}_{2}\) (ii)\( H_{2} =\Theta ^{CH}\) and
(iii)\( H – C \equiv \Theta C\) is in the order of –
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Question 61 of 76
61. Question
Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH ?
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Question 62 of 76
62. Question
The sequence of ionic mobility in aqueous solutions is –
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Question 63 of 76
63. Question
If uncertainty in position and momentum are equal, then uncertainty in velocity is –
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Question 64 of 76
64. Question
How many stereoisomers does this molecule have ?
\(CH_{3}CH = CHCH_{2}CHBrCH_{3}\)
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Question 65 of 76
65. Question
On the basis of the following\( E^{º}\) values, the strongest oxidizing agent is :
\([Fe(CN)_{6}]^{4} \to [Fe(CN)_{6}]^{3} + e^{1} ,E^{º} = 0.35 V\)
\(Fe^{2+} \to Fe^{3+} + e^{1}, E^{º} = – 0.77 V\)
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Question 66 of 76
66. Question
The correct order of decreasing second ionization enthalpy of Ti = 22, V = 23, Cr = 24 and Mn = 25 is –
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Question 67 of 76
67. Question
Which one of the following is most reactive towards electrophilic attack ?
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Question 68 of 76
68. Question
Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order ?
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Question 69 of 76
69. Question
How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl ?
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Question 70 of 76
70. Question
The stability of carbanions in the following :
is in the order of :
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Question 71 of 76
71. Question
Acetophenone when reacted with a base,\(C_{2}H_{5}ONa\), yields a stable compound which has the structure :
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Question 72 of 76
72. Question
Volume occupied by one molecule of water (density = 1\(g cm^{–3})\) is :
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Question 73 of 76
73. Question
Bond dissociation enthalpy of \(H_{2}, Cl_{2}\) and HCl are 434, 242 and 431 kJ\( mol^{–1}\) respectively. Enthalpy of formation of HCl is –
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Question 74 of 76
74. Question
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Question 75 of 76
75. Question
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Question 76 of 76
76. Question
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