NEET 2013 | NEET Year Wise Previous Years Questions

Biology

Chemistry

Physics

1. If an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quant 2. A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 seconds, the next 5 seconds and th 3. The velocity of a projectile at the initial point A is $$\left( {2\widehat i + 3\widehat j} \right)$$ m/s. It's velocity 4. An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. Th 5. The upper half of an inclined plane of inclination $$\theta $$ is perfectly smooth while lower half is rough. A block st 6. Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is appli 7. A uniform force of $$\left( {3\widehat i + \widehat j} \right)$$ newton acts on a particle of mass 2 kg. Hence the parti 8. A small object of uniform density rolls up a curved surface with an initial velocity 'v'. It reaches upto a maximum heig 9. 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 10. 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 11. 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 12. A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white h 13. The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cp and Cv, respectively. If &nbs 14. The following four wires are made of the same material. Which of these will have the largest extension when the same ten 15. The wettability of a surface by a liquid depends primarily on 16. The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from T1K to T2K is 17. During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio 18. In the given (V $$-$$ T) diagram, what is the relation between pressure P1 and P2? 19. 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 20. If we study the vibration of a pipe open at both ends. then the following statement is not true. 21. A wave travelling in the + ve x-direction having displacement along y-direction as 1 m, wavelength 2$$\pi $$ m and freq 22. A source of unknown frequency gives 4 beats/s when sounded with a source of known frquency 250 Hz. The second harmonic o 23. Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium sepa 24. A, B and C are three points in a uniform electric field. The electric potential is 25. 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 26. The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 $$\Omega $$ is 27. A wire of resistance 4 $$\Omega $$ is stretched to twice its original length. The resistance of stretched wire would be 28. When a proton is released from rest in a room, it starts with an initial acceleration $$a$$0 towards west. When it is pr 29. A current loop in a magnetic field 30. 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 31. A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is 32. A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when 33. The condition under which a microwave oven heats up a food item containing water molecules most efficiently is 34. A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses a 35. 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 36. In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths $${\lambda 37. A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a larg 38. For photoelectric emission from certain metal the cutoff frequency is $$\upsilon $$. If radiation of frequency 2$$\upsil 39. The wavelength $$\lambda $$e of an electron and $$\lambda $$p of a photon of same energy E are related by 40. Ratio of longest wave lengths corresponding to Lyman and Balmer series in hydrogen spectrum is 41. The half life of a radioactive isotope 'X' is 20 years. It decays to another element 'Y' which is stable. The two elemen 42. A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 43. In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and curren 44. In a n-type semiconductor, which of the following statement is true. 45. The output (X) of the logic circuit shown ion figure will be

NEET 2013

MCQ (Single Correct Answer)

-1

KMnO₄ can be prepared from K₂MnO₄ as per the reaction,

3MnO₄^2$$-$$ + 2H₂O $$\rightleftharpoons$$ 2MnO₄^$$-$$ + MnO² + 4OH^$$-$$

The reaction can go to completion by removing OH^$$-$$ ions by adding