AIPMT 2012 Prelims | NEET Year Wise Previous Years Questions

Biology

Chemistry

1. Maximum number of electrons in a subshell with $$l$$ = 3 and n = 4 is 2. The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is 3. Identify the wrong statement in the following. 4. Which one of the following pairs is isostructural (i.e., having the same shape and hybridization) ? 5. Which of the following species contains three bond pairs and one lone pair arround the central atom ? 6. Bond order of 1.5 is shown by 7. The pair of species with the same bond order is 8. In which of the following reactions, standard reaction entropy change ($$\Delta $$So) is positive and standard Gibb's en 9. Standard enthalpy of vaporisation $$\Delta $$vapHo for water at 100oC is 40.66 kJ mol$$-$$1. The internal energy of vapo 10. The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0oC is 11. pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is 12. Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH 13. Buffer solutions have constant acidity and alkalinity because 14. Among the following compounds the one that is most reactive towards electrophilic nitration is 15. Which nomenclature is not according to IUPAC system? 16. In the following reaction The major product is 17. Which of the following acids does not exhibit optical isomerism? 18. In the following sequence of reactions the end product (C) is 19. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from 20. A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes m 21. The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) an 22. CH3CHO and C6H5CH2CHO can be distinguished chemically by 23. Predict the products in the given reaction. 24. Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is 25. Deficiency of vitamin B1 causes the disease 26. Which one of the following sets of monosaccharides forms sucrose? 27. pA and pB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If xA re 28. Limiting molar conductivity of NH4OH $$\left[ {} \right.$$i.e.  $$\Lambda _{m\left( {N{H_4}OH} \right)}^0$$$$\left 29. In a reaction, A + B $$ \to $$ product, rate is doubled when the concentration of B is doubled, and rate increases by a 30. In a zero-order reaction, for every 10oC rise of temperature, the rate is doubled. If the temperature is increased from 31. Which of the following statements is not valid for oxoacids of phosphorus? 32. In which of the following compounds, nitrogen exhibits highest oxidation state? 33. Sulphur trioxide can be obtained by which of the following reaction? 34. Which of the statements is not true? 35. Identify the alloy containing a non-metal as a constituent in it. 36. Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

Physics

1. The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionalit 2. The motion of a particle along a straight line is described by equation x = 8 + 12t $$-$$ t3 where x is in metre and t i 3. The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is 4. A particle has initial velocity $$\left( {2\overrightarrow i + 3\overrightarrow j } \right)$$ and acceleration $$\left( 5. Two spheres A and B of masses m1 and m2 respectively collide. A is at rest initially and B is moving with velocity v alo 6. A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 m s$$-$$1. It collides with a horizonta 7. The potential energy of a particle in a force field is $$U = {A \over {{r^2}}} - {B \over r}$$ where A and B are positiv 8. Two persons of masses 55 kg and 65 kg respectively, are at the opposite ends of a boat. The length of the boat is 3.0 m 9. When a mass is rotating in a plane about a fixed point, its angular momentum is directed along 10. A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45o, the 11. ABC is an equilateral triangle with O as its centre. $${\overrightarrow F _1},{\overrightarrow F _2}$$ and $${\overright 12. The height at which the weight of a body becomes $${\left( {{1 \over {16}}} \right)^{th}}$$, its weight on the surface 13. A geostationary satellite is orbiting the earth at a height of 5R above the surface of the earth, R being the radius of 14. A spherical planet has a mass MP and diameter DP. A particle of mass m falling freely near the surface of this planet wi 15. If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate o 16. Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which one of th 17. One mole of an ideal gas goes from an initial state A to final state B via two processes : It first undergoes isothermal 18. A thermodynamic system is taken through the cycle ABCD as shown in figure. Heat rejected by the gas during the cycle is 19. When a string is divided into three segments of length $$l$$1, $$l$$2 and $$l$$3 the fundamental frequencies of these th 20. Two sources of sound placed close to each other, are emitting progressive waves given by y1 = 4sin600$$\pi $$t and y2 21. An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that t 22. What is the flux through a cube of side $$a$$ if a point charge of q is at one of its corner? 23. Four point charges $$-$$Q, $$-$$q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q 24. In the circuit shown the cells A and B have negligible resistances. For VA = 12 V, R1 = 500 $$\Omega $$ and R = 100 $$\ 25. A ring is made of a wire having a resistance R0 = 12 $$\Omega $$. Find the points A and B, as shown in the figure, at wh 26. If voltage across a bulb rated 220 volt-100 watt drops by 2.5% of its rated value, the percentage of the rated value by 27. A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampare range. The value (in ohm) of ne 28. Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flo 29. An alternating electric field, of frequency $$v$$, is applied across the does (radius = R) of a cyclotron that is being 30. A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It 31. A coil of resistance 400 $$\Omega $$ is placed in a magnetic field. If the magnetic flux $$\phi $$ (Wb) linked with the 32. The current $$(I)$$ in the inductance is varying with time according to the plot shown in figure. Which one of the foll 33. In an electrical circuit R, L, C and a.c. voltage source are all connected in series. When L is removed from the circuit 34. The electric field associated with an em wave in vacuum is given by E = $$\widehat i$$ 40 cos (kz $$-$$ 6 $$ \times $$ 35. A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small ) and emer 36. When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. Thi 37. A concave mirror of focal length $$f$$1 is placed at a distance of d from a convex lens of focal length $$f$$2. A beam o 38. The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and e 39. A 200 W sodium street lamp emits yellow light of wavelength 0.6 $$\mu $$m. Assuming it to be 25% efficient in converting 40. Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a 41. An $$\alpha $$-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m2. Th 42. An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the 43. Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to t 44. Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is 45. C and Si both have same lattice structure; having 4 bonding electrons in each. However, C is insulator where as Si is in 46. The figure shows a logic circuit with two inputs A and B and the output C. The voltage wave forms across A, B and C are

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be 3.57 V. The threshold frequency of the material is

4 $$ \times $$ 10¹⁵ Hz

5 $$ \times $$ 10¹⁵ Hz

1.6 $$ \times $$ 10¹⁵ Hz

2.5 $$ \times $$ 10¹⁵ Hz

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

An $$\alpha $$-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m². The de Broglie wavelength associated with the particle will be

1 $$\mathop A\limits^ \circ $$

0.1 $$\mathop A\limits^ \circ $$

10 $$\mathop A\limits^ \circ $$

0.01 $$\mathop A\limits^ \circ $$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom acquired as a result of photon emission will be

$${{24hR} \over {25m}}$$

$${{25hR} \over {24m}}$$

$${{25m} \over {24hR}}$$

$${{24m} \over {25hR}}$$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths $$\lambda $$₁ : $$\lambda $$₂ emitted in the two cases is

$${7 \over 5}$$

$${27 \over 20}$$

$${27 \over 5}$$

$${20 \over 7}$$

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