AIPMT 2008 | NEET Year Wise Previous Years Questions

Biology

Chemistry

1. In which of the following coordination entities the magnitude of $$\Delta $$o (CFSE in octahedral field) will be maximum 2. Which of the following complexes exhibits the highest paramagnetic behaviour? where gly = glycine, en = ethylenediamin 3. How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g HCl ? 4. In a SN2 substitution reaction of the type R $$-$$ Br + Cl$$-$$ $$\buildrel {DMF} \over \longrightarrow $$ R$$-$$Cl + 5. Number of moles of MnO$$_4^{ - }$$ required to oxidize one mole of ferrous oxalate completely in acidic medium will be 6. A strong base can abstract an $$\alpha $$-hydrogen from 7. The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of 8. Acetophenone when reacted with a base, C2H5ONa,   yields a stable compound which has the structure 9. In a reaction of aniline a coloured product C was obtained. The structure of C would be 10. In DNA, the complimentary bases are 11. Which of the following is an amine hormone? 12. How many stereoisomers does this molecule have? CH3CH$$=$$CHCH2CHBrCH3 13. On the basis of the following Eo values, the strongest oxidizing agent is [Fe(CN)6]4$$-$$ $$ \to $$ [Fe(CN)6]3$$-$$ + e 14. Kohlrausch's law states that at 15. Standard free energies of formation (in kJ/mol) at 298 K are $$-$$237.2, $$-$$ 394.4 and $$-$$8.2 for H2O(l), CO2(g) and 16. The rate constants k1 and k2 for two different reactions are 1016 $$ \cdot $$ e$$-$$2000/T and 1015 $$ \cdot $$ e$$-$$ 17. The bromination of acetone that occurs in acid solution is represented by this equation. CH3COCH3(aq) + Br2(aq) &n 18. The angular shape of ozone molecule (O3) consists of 19. The correct order of decreasing second ionisation enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is 20. For the gas phase reaction, PCl5(g)  $$\rightleftharpoons$$ PCl3(g) + Cl2(g) which of the following condition 21. An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empiri 22. What volume of oxygen gas (O2) measuread at 0oC and 1 atm, is needed to burn completely 1 L of propane gas (C3H8) measu 23. The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 $$ \times $$ 24. If uncertainty in position and momentum are equal, then uncertainty in velocity is 25. Which one of the following arrangements does not give the correct picture of the trends indicated against it ? 26. Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them 27. The correct order of increasing bond angles in the following triatomic species is 28. Which of the following are not state functions ? (I) q + w     (II) q (III) w&n 29. Bond dissociation enthalpy of H2, Cl2 and HCl are 434, 242 and 431 kJ mol$$-$$1 respectively. Enthalpy of formation of H 30. The dissociation equilibrium of a gass AB2 can be represented as : 2AB2(g) $$\rightleftharpoons$$ 2AB(g) + B2(g) The d 31. If the concentration of OH$$-$$ ions in the reaction Fe(OH)3(s) $$\rightleftharpoons$$ Fe3+(aq) + 3OH$$-$$(aq) is decr 32. The value of equilibrium constant of the reaction HI(g) $$\rightleftharpoons$$ $${1 \over 2}$$H2(g) + $${1 \over 2}$$I2 33. The values of for the reactions, X $$\rightleftharpoons$$ Y + Z      . . . .(i) A $$\r 34. 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 t 35. Base strength of is in the order of 36. Which one of the following is most reactive towards electrophilic attack? 37. The stability of carbanions in the following. is in the order of 38. A (predominantly) is 39. In the hydrocarbon, The state of hybridization of carbons 1, 3 and 5 are in the following sequence

Physics

1. Two thin lenses of focal lengths f1 and f2 are in contact and coaxial. The power of the combination is 2. An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20oC ? 3. A current of 3 amp. flows through the 2 $$\Omega $$ resistor shown in the circuit. The power dissipated in the 5 $$\Omeg 4. A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circui 5. A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction $$\overright 6. A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR a 7. A galvanometer of resistance 50 $$\Omega $$ is connected to a battery of 3 V along with a resistance of 2950 $$\Omega $$ 8. Curie temperature above which 9. A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with 10. In an a.c. circuit the e.m.f. ($$\varepsilon $$) and the current (i)  at any instant are given respectively b 11. A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction $${1 \over \pi }\left( {{{Wb} \ov 12. The velocity of electromagnetic radiation in a medium of permittivity $$\varepsilon $$0 and permeability $$\mu $$0 is gi 13. A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respe 14. A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. 15. A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 $$ \times $$ 106 m s$$-$$1. T 16. The work function of a surface of a photosensitive material is 6.2 eV. The wavelength of the incident radiation for whic 17. In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result 18. If M(A; Z), Mp and Mn denote the masses of the nucleus $${}_Z^AX,$$ proton and neutron respectively in units of u (1 u = 19. The ground state energy of hydrogen atom is $$-$$ 13.6 eV. When its electron is in the first excited state, its excitati 20. A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be abs 21. If the lattice parameter for a crystalline structure is 3.6 $$\mathop A\limits^ \circ $$, then the atomic radius in fcc 22. The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius, around t 23. Which two of the following five physical parameters have the same dimensions ? 1.  Energy density 2. &nb 24. A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 ms$$-$$1 to 20 ms$$-$$ 25. The distance travelled by a particle starting from rest and moving with an acceleration $${4 \over 3}$$m s$$-$$2, in th 26. A particle of mass m is projected with velocity v making an angle of 45o with the horizontal. When the particle lands on 27. A particle shows distance - time curve as given in this figure. The maximum instaneous velocity of the particle is aroun 28. A roller coaster is designed such that riders experience ''weightlessness'' as they go round the top of a hill whose ra 29. Sand is being dropped on a conveyer belt at the rate of M kg/s. The force necessary to keep the belt moving with a cons 30. Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the mag 31. Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 1 32. A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial 33. A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90o. The mo 34. On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are 39o 35. At 10oC the value of the density of a fixed mass of an ideal gas divided by it pressure is x. At 110oC this ratio is 36. If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cyclic process 37. Two simple harmonic motions of angular frequency 100 and 1000 rad s$$-$$1 have the same displacement amplitude. The rati 38. A point performs simple harmonic oscillation of period T and the equation of motion is given by x = a sin($$\omega $$t + 39. Two periodic waves of intensities $$I$$1 and $$I$$2 pass through a region at the same time in the same direction. The su 40. The wave described by y = 0.25 sin(10$$\pi $$x $$-$$ 2$$\pi $$t), where x and y are in metres and t in seconds, is a wav 41. A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the p 42. A thin conducting ring of radius R is given a charge +Q. The electric field at the centre O of the ring due to the charg 43. The electric potential at a point in free space due to charge Q coulomb is Q $$ \times $$ 1011 volts. The electric field 44. In the circuit shown, the current through the 4 $$\Omega $$ resistor is 1 amp when the points P and M are connected to 45. If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere

AIPMT 2008

MCQ (Single Correct Answer)

-1

The bromination of acetone that occurs in acid solution is represented by this equation.
CH₃COCH_3(aq) + Br_2(aq) $$ \to $$
CH₃COCH₂Br(aq) + H⁺_(aq) + Br^$$-$$_(aq)
These kinetic data were obtained for given reaction concentrations.

Initial concentrations, M
[CH₃COCH₃	[Br₂]	[H⁺]
0.30	0.05	0.05
0.30	0.10	0.05
0.30	0.10	0.10
0.40	0.05	0.20

Initial rate, disappearance of Br₂, Ms^$$-$$1
			5.7$$ \times $$10^$$-$$5
			5.7$$ \times $$10^$$-$$5
			1.2$$ \times $$10^$$-$$4
			3.1$$ \times $$10^$$-$$4