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. Bond order of 1.5 is shown by 6. Which of the following species contains three bond pairs and one lone pair arround the central atom ? 7. The pair of species with the same bond order is 8. 50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the simila 9. In which of the following reactions, standard reaction entropy change ($$\Delta $$So) is positive and standard Gibb's en 10. Standard enthalpy of vaporisation $$\Delta $$vapHo for water at 100oC is 40.66 kJ mol$$-$$1. The internal energy of vapo 11. The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0oC is 12. pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is 13. Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH 14. Buffer solutions have constant acidity and alkalinity because 15. Among the following compounds the one that is most reactive towards electrophilic nitration is 16. Which nomenclature is not according to IUPAC system? 17. In the following reaction The major product is 18. Which of the following acids does not exhibit optical isomerism? 19. In the following sequence of reactions the end product (C) is 20. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from 21. A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes m 22. Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air? 23. The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order : 24. CH3CHO and C6H5CH2CHO can be distinguished chemically by 25. The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) an 26. Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is 27. Predict the products in the given reaction. 28. Deficiency of vitamin B1 causes the disease 29. Which one of the following sets of monosaccharides forms sucrose? 30. Which one of the following is not a condensation polymer? 31. Which of the following statements is false? 32. A metal crystallises with a face-centred cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal a 33. The number of octahedral void(s) per atom present in a cubic close-packed structure is 34. pA and pB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If xA re 35. Limiting molar conductivity of NH4OH $$\left[ {} \right.$$i.e.  $$\Lambda _{m\left( {N{H_4}OH} \right)}^0$$$$\left 36. In a reaction, A + B $$ \to $$ product, rate is doubled when the concentration of B is doubled, and rate increases by a 37. In a zero-order reaction, for every 10oC rise of temperature, the rate is doubled. If the temperature is increased from 38. In Freundlich adsorption isotherm, the value of 1/n is 39. Which one of the following statements is incorrect about enzyme catalysis? 40. The protecting power of lyophilic colloidal sol is expressed in terms of 41. Which of the following statements is not valid for oxoacids of phosphorus? 42. In which of the following compounds, nitrogen exhibits highest oxidation state? 43. Sulphur trioxide can be obtained by which of the following reaction? 44. In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with 45. Which one of the following is a mineral of iron? 46. Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of 47. Which of the statements is not true? 48. Identify the alloy containing a non-metal as a constituent in it. 49. Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour? 50. Which one of the following statements regarding photochemical smog is not correct?

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 $$\left( 5. The potential energy of a particle in a force field is $$U = {A \over {{r^2}}} - {B \over r}$$ where A and B are positiv 6. Two spheres A and B of masses m1 and m2 respectively collide. A is at rest initially and B is moving with velocity v alo 7. A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 m s$$-$$1. It collides with a horizonta 8. When a mass is rotating in a plane about a fixed point, its angular momentum is directed along 9. Two persons of masses 55 kg and 65 kg respectively, are at the opposite ends of a boat. The length of the boat is 3.0 m 10. A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45o, the 11. ABC is an equilateral triangle with O as its centre. $${\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 spherical planet has a mass MP and diameter DP. A particle of mass m falling freely near the surface of this planet wi 14. A geostationary satellite is orbiting the earth at a height of 5R above the surface of the earth, R being the radius of 15. 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 16. 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 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. Four point charges $$-$$Q, $$-$$q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q 23. What is the flux through a cube of side $$a$$ if a point charge of q is at one of its corner? 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 $$ 35. When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. Thi 36. A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small ) and emer 37. A concave mirror of focal length $$f$$1 is placed at a distance of d from a convex lens of focal length $$f$$2. A beam o 38. The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and e 39. Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a 40. A 200 W sodium street lamp emits yellow light of wavelength 0.6 $$\mu $$m. Assuming it to be 25% efficient in converting 41. An $$\alpha $$-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m2. Th 42. A mixture consists of two radioactive materials A1 and A2 with half lives of 20 s and 10 s respectively. Initially the 43. If the nuclear radius of 27Al is 3.6 fermi, the approximate nuclear radius of 64Cu in fermi is 44. Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to t 45. An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the 46. Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is 47. In a CE transistor amplifier, the audio signal voltage across the collector resistance of 2 k$$\Omega $$ is 2 V. If the 48. C and Si both have same lattice structure; having 4 bonding electrons in each. However, C is insulator where as Si is in 49. Transfer characteristics [output voltage (V0) vs input voltage (Vi)] for a base biased transistor in CE configuration is 50. 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

When a string is divided into three segments of length $$l$$₁, $$l$$₂ and $$l$$₃ the fundamental frequencies of these three segments are $${\upsilon _1},{\upsilon _2}$$ and $${\upsilon _3}$$ respectively. The original fundamental frequency ($$v$$) of the string is

$$\sqrt v = \sqrt {{v_1}} + \sqrt {{v_2}} + \sqrt {{v_3}} $$

$$v = {v_1} + {v_2} + {v_3}$$

$${1 \over v} = {1 \over {{v_1}}} + {1 \over {{v_2}}} + {1 \over {{v_3}}}$$

$${1 \over {\sqrt v }} = {1 \over {\sqrt {{v_1}} }} + {1 \over {\sqrt {{v_2}} }} + {1 \over {\sqrt {{v_3}} }}$$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Two sources of sound placed close to each other, are emitting progressive waves given by
y₁ = 4sin600$$\pi $$t and y₂ = 5sin608$$\pi $$t
An observer located near these two sources of sound will hear

4 beats per second with intensity ratio 25 : 16 between waxing and waning.

8 beats per second with intensity ratio 25 : 16 between waxing and waning.

8 beats per second with intensity ratio 81 : 1 between waxing and warning.

4 beats per second with intensity ratio 81 : 1 between waxing and waning.

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that the axis of the dipole makes an angle $$\theta $$ with the direction of the field. Assuming that the potential energy of the dipole to be zero when $$\theta $$ = 90^o, the torque and the potential energy of the dipole will respectively be

pEsin$$\theta $$, $$-$$pEcos$$\theta $$

pEsin$$\theta $$, $$-$$2pEcos$$\theta $$

pEsin$$\theta $$, 2pEcos$$\theta $$

pEcos$$\theta $$, $$-$$pEsin$$\theta $$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

What is the flux through a cube of side $$a$$ if a point charge of q is at one of its corner?

$${{2q} \over {{\varepsilon _0}}}$$

$${q \over {8{\varepsilon _0}}}$$

$${q \over {{\varepsilon _0}}}$$

$${q \over {2{\varepsilon _0}}}6{a^2}$$