AIPMT 2015 | NEET Year Wise Previous Years Questions

Biology

Chemistry

Physics

1. A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E0 and a resistance 2. 4.0 g of a gas occupies 22.4 litres at NTP. The specific heat capacity of the gas at constant volume is 5.0 J K$$-$$1 mo 3. A particle is executing a simple harmonic motion. Its maximum acceleration is $$\alpha $$ and maximum velocity is $$\bet 4. A string is stretched between fixed points separated by 75.0 cm. It is observed to have resonant frequencies of 420 Hz 5. The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open a 6. A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has 7. A proton and an alpha particle both enter a region of uniform magnetic field B, moving at right angles to the field B. I 8. Two metal wires of identical dimensions are connected in series. If $$\sigma $$1 and $$\sigma $$2 are the conductivity o 9. A parallel plate air capacitor has capacity C, distance of separation between plates is d and potential difference $$V$$ 10. A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire is suspended vertically in a uniform magneti 11. If potential (in volts) in a region is expressed as V(x, y, z) = 6xy $$-$$ y + 2yz, the electric field (in N/C) at point 12. Two slits in Young's experiment have widths in the ratio 1 : 25. The ratio of intensity at the maxima and minima in the 13. A series R-C circuit is connected to an alternating voltage source. Consider two situations : (a)  When capac 14. An electron moves on a straight line path XY as shown. The abcd is a coil adjacent to the path of electron. What will be 15. A beam of light consisting of red, green and blue colours is incifent on a right angled prism. The refractive index of t 16. In an astronomical telescope in normal adjustment a straight black line of length L is drawn on inside part of objective 17. At the first minimum adjacent to the central maximum of a single-slit diffraction pattern, the phase difference between 18. The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong ? 19. A nucleus of uranium decays at rest into nuclei of thorium and helium. Then 20. A photoelectric surface is illuminated successively by monochromatic light of wavelength $$\lambda $$ and $$\lambda/2 $$ 21. In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Ba 22. Point masses m1 and m2 are placed at the opposite ends of a rigid rod of length L, and negligible mass. The rod is to be 23. On a frictionless surface, a block of mass M moving at speed v collides elastically with another block of same mass M wh 24. Two particles A and B, move with constant velocities $$\overrightarrow {{v_1}} $$ and $$\overrightarrow {{v_2}} $$. At t 25. The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the d 26. If vectors $$\overrightarrow A = \cos \omega t\widehat i + \sin \omega t\widehat j$$ and $$\overrightarrow B = \cos {{ 27. Two stones of masses m and 2m are whirled in horizontal circles, the heavier one in a radius $${r \over 2}$$ and the lig 28. A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizo 29. The positions vector of a particle $$\overrightarrow R $$ as a function of time is given by $$\overrightarrow R $$ = 4si 30. A ball is thrown vertically downwards from a height of 20 m with an initial velocity v0. It collides with the ground, lo 31. A remote-sensing satellite of earth revolves in a circular orbit at a height of 0.25 $$ \times $$ 106 m above the surfac 32. A force $$\overrightarrow F = \alpha \widehat i + 3\widehat j + 6\widehat k$$ is acting at a point $$\overrightarrow r 33. Light of wavelength 500 nm is incifent on a metal with work function 2.28 eV. The de Broglie wavelength of the emitted e 34. A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the 35. An automobile moves on a road with a speed of 54 km h$$-$$1. The radius of its wheels is 0.45 m and the moment of inerti 36. Water rises to a height h in capillary tube. If the length of capillary tube above the surface of water is made less tha 37. The value of coefficient of volume expansion of glycerin is 5 $$ \times $$ 10$$-$$4 K$$-$$1. The fractional change in th 38. The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of 39. The Young's modulus of steel is twice that of brass. Two wires of same length and of same area of cross section, one of 40. Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. 41. An ideal gas is compressed to half its initial volume by means of several processes. Which of the process results in th 42. The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is $$-$$20oC, the temperature o 43. In the given figure, a diode D is connected to an external resistance R = 100 $$\Omega $$ and an e.m.f. of 3.5 V. If the 44. If dimensions of critical velocity $$\upsilon $$c of a liquid flowing through a tube are expressed as $$\left[ {{\eta ^x

AIPMT 2015

MCQ (Single Correct Answer)

-1

Which of the following reaction(s) can be used for the preparation of alkyl halides?

AIPMT 2015 Chemistry - Alcohol, Phenols and Ethers Question 25 English

(I) and (II) only

(IV) only

(III) and (IV) only

(I), (III) and (IV) only

AIPMT 2015

MCQ (Single Correct Answer)

-1

The rate constant of the reaction A $$ \to $$ B is 0.6 $$ \times $$ 10^$$-$$3 mol L^$$-$$1 s^$$-$$1. If the concentration of A is 5 M, then concentration of B after 20 minutes is

3.60 M

0.36 M

0.72 M

1.08 M

AIPMT 2015

MCQ (Single Correct Answer)

-1

Strong reducing behavior of H₃PO₂ is due to

high electron gain enthalpy of phosphorus

high oxidation state of phosphorus

presence of two $$-$$OH groups and one P$$-$$H bond

presence of one $$-$$OH group and two P$$-$$H bonds.

AIPMT 2015

MCQ (Single Correct Answer)

-1

The formation of the oxide ion, O^2$$-$$_(g) from oxygen atom requires first an exthermic and then an endothermic step as shown below:
O_(g) + e^$$-$$ $$ \to $$ O^$$-$$_(g); $$\Delta $$_fH^o = $$-$$141 kJ mol^$$-$$1

O^$$-$$_(g) + e^$$-$$ $$ \to $$ O^2$$-$$_(g); $$\Delta $$_fH^o = +780 kJ mol^$$-$$1

Thus, process of formation of O^2$$-$$ is isoelectronic with neon. It is due to the fact that,

O^$$-$$ ion has comparatively smaller size than oxygen atom

oxygen is more electronegative

addition of electron in oxygen results in larger size of the ion

electron repulsion outweighs the stability gained by achieving noble gas configuration.

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