NEET 2013 | NEET Year Wise Previous Years Questions

Biology

Chemistry

1. An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. The number of 2. 6.02 $$ \times $$ 1020 molecules of urea present in 100 mL of its solution. The concentration of solution is 3. The basic structural unit of silicates is 4. How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO3? The concentrated ac 5. A button cell used in watches function as following. Zn(s) + Ag2O(s) + H2O(l) $$\rightleftharpoons$$ 2Ag(s) + Zn2+(aq)6. At 25oC molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm$$-$$1 cm2 mol$$-$$1 and at inf 7. A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas ar 8. What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20oC to 35oC? (R =9. Which of the following structure is similar to graphite? 10. In the reaction A is 11. Which of these is not a monomer for a high molecular mass silicone polymer? 12. Which is the strongest acid in the following?13. Which one of the following molecules contains no $$\pi $$ bond? 14. Which of the following does not give oxygen on heating? 15. Identify the correct order of solubility in aqueous medium. 16. Which of the following statements about the interstitial compounds is incorrect? 17. Which of the following lanthanoid ions is diamagnetic? (At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)18. A magnetic moment at 1.73 BM will be shown by one among of the following 19. KMnO4 can be prepared from K2MnO4 as per the reaction, 3MnO42$$-$$ + 2H2O $$\rightleftharpoons$$ 2MnO4$$-$$ + MnO2 + 20. What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ? n = 3, $$l$21. Based on equation E = $$-$$ 2.178 $$ \times $$ 10$$-$$18 J $$\left( {{{{Z^2}} \over {{n^2}}}} \right)$$, certain conclus 22. The value of Planck's constant is 6.63 $$ \times $$ 10$$-$$34 J s. The speed of light is 3 $$ \times $$ 1017 mm s$$-$$1 23. Which of the following is electron-deficient ? 24. XeF2 is isostructural with 25. Which of the following is a polar molecule? 26. Dipole-induced dipole interactions are present in which of the following pairs 27. Which of the following is paramagnetic? 28. A reaction having equal energies of activation for forward and reverse reactions has 29. Which of these is least likely to act as a lewis base ? 30. The radical, is aromatic because it has 31. The structure of isobutyl group in an organic compound is 32. Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is 33. Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ? 34. Which of the following compounds will not undergo Friedal-Craft's reaction easily? 35. Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?36. The order of stability of the following tautomeric compounds is 37. Reaction by which benzaldehyde cannot be prepared 38. Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80$$-$$100oC forms which one of the following products?

Physics

1. For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens b 2. Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium sepa 3. The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectiv 4. The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 $$\Omega $$ is 5. A wire of resistance 4 $$\Omega $$ is stretched to twice its original length. The resistance of stretched wire would be 6. When a proton is released from rest in a room, it starts with an initial acceleration $$a$$0 towards west. When it is pr 7. A current loop in a magnetic field 8. A bar magnet of length $$'l'$$ and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new 9. A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is 10. A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when 11. The condition under which a microwave oven heats up a food item containing water molecules most efficiently is 12. A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses a 13. A, B and C are three points in a uniform electric field. The electric potential is 14. In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths $${\lambda 15. A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a larg 16. For photoelectric emission from certain metal the cutoff frequency is $$\upsilon $$. If radiation of frequency 2$$\upsil 17. The wavelength $$\lambda $$e of an electron and $$\lambda $$p of a photon of same energy E are related by 18. Ratio of longest wave lengths corresponding to Lyman and Balmer series in hydrogen spectrum is 19. A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 20. The output (X) of the logic circuit shown ion figure will be 21. A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white h 22. A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 seconds, the next 5 seconds and th 23. The velocity of a projectile at the initial point A is $$\left( {2\widehat i + 3\widehat j} \right)$$ m/s. It's velocity 24. An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. Th 25. The upper half of an inclined plane of inclination $$\theta $$ is perfectly smooth while lower half is rough. A block st 26. Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is appli 27. A uniform force of $$\left( {3\widehat i + \widehat j} \right)$$ newton acts on a particle of mass 2 kg. Hence the parti 28. A small object of uniform density rolls up a curved surface with an initial velocity 'v'. It reaches upto a maximum heig 29. A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a massless string tied to point Q as s 30. A body of mass 'm' is taken from the earth's surface to the height equal to twice the radius (R) of the earth. The chang 31. Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1 m, 2 m, 4 m, 8 m, . . . , respectively 32. The wettability of a surface by a liquid depends primarily on 33. The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cp and Cv, respectively. If &nbs 34. The following four wires are made of the same material. Which of these will have the largest extension when the same ten 35. The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from T1K to T2K is 36. In the given (V $$-$$ T) diagram, what is the relation between pressure P1 and P2? 37. A gas is taken through the cycle A $$ \to $$ B $$ \to $$ C $$ \to $$ A, as shown. what is the net work done by the gas 38. During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio 39. If we study the vibration of a pipe open at both ends. then the following statement is not true. 40. A wave travelling in the + ve x-direction having displacement along y-direction as 1 m, wavelength 2$$\pi $$ m and freq 41. A source of unknown frequency gives 4 beats/s when sounded with a source of known frquency 250 Hz. The second harmonic o 42. If an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quant

NEET 2013

MCQ (Single Correct Answer)

-1

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20^oC to 35^oC?
(R = 8.314 J mol^$$-$$1 K^$$-$$1)