NEET 2013 | NEET Year Wise Previous Years Questions

Biology

Chemistry

Physics

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

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

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