AIPMT 2003 | NEET Year Wise Previous Years Questions

Biology

Chemistry

1. The radioistope, tritium ($${}_1^3$$H) has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how man 2. The number of unpaired electrons in the complex ion [CoF6]3$$-$$ is (Atomic no. : Co = 27) 3. Among the following which is not the $$\pi $$-bonded organometallic compound? 4. The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is (Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71) 5. In this reaction : CH3CHO + HCN $$ \to $$ CH3CH(OH)CN           &nbsp 6. $$A$$ and $$B$$ in the following reactions are : 7. When $$m$$-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are) 8. In a set of the given reactions, acetic acid yielded a product C. Product $$C$$ would be 9. The final product C, obtained in this reaction would be 10. Glycolysis is 11. Vitamin B12 contains 12. Chargaff's rule states that in an organism 13. Phospholipids are esters of glycerol with 14. The e.m.f. of a Daniell cell at 298 K is E1. When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the 15. On the basis of the information available from the reaction, 4/3Al + O2 $$ \to $$ 2/3Al2O3,   $$\Delta $$G = 16. The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, $$k = 17. If the rate of the reaction is equal to the rate constant, the order of the reaction is 18. The reaction A $$ \to $$ B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 19. The activation energy for a simple chemical reaction A $$\rightleftharpoons$$ B is E$$a$$ in forward direction. The acti 20. Which one of the following compounds is not a protonic acid? 21. Which one of the following characteristics of the transition metals is associated with their catalytic activity? 22. The basic character of the transition metal monoxides follows the order (Atomic no's. Ti = 22, V = 23, Cr = 24, Fe = 26) 23. The equilibrium constants of the following are N2 + 3H2 $$\rightleftharpoons$$ 2NH3;     K1 N2 24. The velocity of Planck's constant is 6.63 $$ \times $$ 10$$-$$34 J s. The velocity of light is 3.0 $$ \times $$ 108 m 25. The ions O2$$-$$, F$$-$$, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show 26. Which one of the following statements is not correct for sigma- and pi- bonds formed between two carbon atoms? 27. For the reaction, C3H8(g) + 5O2(g) $$ \to $$ 3CO2(g) + 4H2O(l) at constant temperature, $$\Delta $$H $$-$$ $$\Delt 28. The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm$$-$$3, respectively. If the standard free energy d 29. Formation of solution from two components can be considered as (i) Pure solvent $$ \to $$ separated solvent m 30. What is the entropy change (in J K$$-$$1 mol$$-$$1) when one mole of ice is converted into water at 0oC? (The enthalpy c 31. For which one of the following equations is $$\Delta $$Horeact equal to $$\Delta $$Hof for the product ? 32. The molar heat capacity of water at constant pressure, C, is 75 J K$$-$$1 mol$$-$$1. When 1.0 kJ of heat is supplied to 33. Which one of the following statements is not true? 34. The reaction quotient (Q) for the reaction N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g) is given by $$Q = {{{{\left[ 35. The solubility product of AgI at 25oC is 1.0 $$ \times $$ 10$$-$$16 mol2 L$$-$$2. The solubility of AgI in 10$$-$$4 N so 36. Name of the compound given below is 37. Which one of the following orders of acid strength is correct ? 38. The compound on reaction with NaIO4 in the presence of KMnO4 gives 39. Which one of the following is a free-radical substitution reaction ? 40. The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II) and ni 41. Which of the following pairs of compounds are enantiomers? 42. The oxidation states of sulphur in the anions SO3$${_3^{2 - }}$$, S2O$${_4^{2 - }}$$ and S2O$${_6^{2 - }}$$ follow t

Physics

1. An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let $$f,f',$$ $$f''$$ 2. Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time the combination is connected 3. Fuse wire is a wire of 4. In a Wheatstone's bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, 5. An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in the kettle 6. A long solenoid carrying a current producess a magnetic field B along its axis. If the current is doubled and the number 7. A charged particle moves through a magnetic field in a firection perpendicular to it. Then the 8. A diamagnetic material in a magnetic field moves 9. According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature $$T$$ is proportional to 10. A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to its period and motion if its 11. Which of the following rays are not electromagnetic waves ? 12. We consider the radiation emitted by the human body. Which one of the following statements is true? 13. A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal 14. A charge q is located at the centre of a cube. The electric flux through any face is 15. A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then 16. J.J. Thomson's cathode-ray tube experiment demonstrated that 17. An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb force $$\overrig 18. Solar energy is mainly caused due to 19. The volume occupied by an atom is greater than the volume of the nucleus by a factor of about 20. The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $${}_2^4$$ 21. In which of the following systems will the radius of the first orbit (n = 1) be minimum ? 22. Reverse bias applied to a junction diode 23. Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the ma 24. A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should b 25. The vector sum of two forces is perpendicular to their vector differences. In that case, the forces 26. A particle moves along a circle of radius $$\left( {{{20} \over \pi }} \right)$$ m with constants tangential acceleratio 27. A man weight 80 kg. He stands on a weighting scale in a lift which is moving upwards with a uniform acceleration of 5 m 28. A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it bu 29. When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential e 30. A stationary particle explodes into two particles of masses m1 and m2 which move in opposite directions with velocities 31. A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is K. 32. A stone is tied to a string of length $$l$$ and is whirled in a vertical circle with the other end of the string as the 33. A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is 34. A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity $$\omega $$. Fou 35. The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a 36. A body of mass m is placed on earth's surface which is taken from earth surface to a height of h = 3R, then change in gr 37. Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 38. An ideal gas heat engine operates in a Carnot cycle between 227oC and 127oC. It absorbs 6 kcal at the height temperature 39. Which one of the following statements is true for the speed v and the acceleration a of a particle executing simple harm 40. The potential energy of a simple harmonic oscillator when the particle is half way to its end point is 41. A particle of mass m oscillates with simple harmonic motion between points x1 and x2, the equilibrium position being O. 42. In case of a forced vibration, the resonance peak becomes very sharp when the 43. The time period of mass suspended from a spring is T. If the spring is cut into four equal parts and the same mass is su 44. Three capacitors each of capacity 4 $$\mu $$F are to be connected in such a way that the effective capacitance is $$6\mu 45. If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be 46. Barrier potential of a p-n junction diode does not depened on 47. If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascent is

AIPMT 2003

MCQ (Single Correct Answer)

-1

In which of the following systems will the radius of the first orbit (n = 1) be minimum ?

doubly ionized lithium

singly ionized helium

deuterium atom

hydrogen atom

AIPMT 2003

MCQ (Single Correct Answer)

-1

Reverse bias applied to a junction diode

lowers the potential barrier

raises the potential barrier

increases the majority carrier current

increases the minority carrier current

AIPMT 2003

MCQ (Single Correct Answer)

-1

Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be

3 F

F/3

F/9

AIPMT 2003

MCQ (Single Correct Answer)

-1

A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time ? (Given g = 9.8 m/s²)

more than 19.6 m/s

at least 9.8 m/s

any speed less than 19.6 m/s

only with speed 19.6 m/s.

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