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

Physics

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

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

$${7 \over 5}$$

$${27 \over 20}$$

$${27 \over 5}$$

$${20 \over 7}$$

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

Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is

AIPMT 2012 Prelims Physics - Semiconductor Electronics Question 90 English

0.75 A

zero

0.25 A

0.5 A

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

C and Si both have same lattice structure; having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because

In case of C the valence band is not completely filled at absolute zero temperature.

In case of C the conduction band is partly filled even at absolute zero temperature.

The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third.

The four bonding electrons in the case of C lie in the third orbit , whereas for Si they lie in the fourth orbit.

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