AIPMT Physics Previous Year Question Paper 2009


AIPMT Sample Papers 2009 for Physics

1. If uncertainty in position and momentum are equal, then uncertainty in velocity is
(1) 
(2) 
(3) 
(4) 

2. If a gas expands at constant temperature, it indicates that
(1) Number of the molecules of gas increases
(2) Kinetic energy of molecules decreases
(3) Pressure of the gas increases
(4) Kinetic energy of molecules remains the same

3. The value of equilibrium constant of the reaction 
The equilibrium constant of the reaction 
(1) 1/8
(2) 1/16
(3) 1/64
(4) 16

4. If 'a' stands for the edge length of the cubic systems : simple cubic, body centred
cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be
respectively
(1) 
(2) 
(3) 
(4) 

5. Kohlrausch's law states that at
(1) Infinite dilution, each ion makes definite contribution to equivalent conductance of an
electrolyte, whatever be the nature of the other ion of the electrolyte
(2) Finite dilution, each ion makes definite contribution to equivalent conductance of an
electrolyte, whatever be the nature of the other ion of the electrolyte
(3) Infinite dilution each ion makes definite contribution to equivalent conductance of an
electrolyte depending on the nature of the other ion of the electrolyte
(4) Infinite dilution, each ion makes definite contribution to conductance of an electrolyte
whatever be the nature of the other ion of the electrolyte

6. The measurement of the electron position is associated with an uncertainty in
momentum, which is equal to 1 × 10-18 g cm s-1. The uncertainty in electron velocity is,
(mass of an electron is 9 × 10-28 g)
(1) 1 × 1011 cm s-1
(2) 1 × 109 cm s-1
(3) 1 × 106 cm s-1
(4)1 × 105 cm s-1
(5)

7. Which of the following are not state functions?
(I) q + w
(II) q
(III) w
(IV) H-TS
(1) (II) and (III)
(2) (I) and (IV)
(3) (II), (III) and (IV)
(4)(I), (II) and (III)


8. The bromination of acetone that occurs in acid solution is represented by this
equation 
These kinetic data were obtained for given reaction concentrations

Based on these data, the rate equation is
(1) Rate = k[CH3COCH3][Br2][H+]
(2) Rate = k[CH3COCH3][H+]
(3) Rate = k[CH = COCH3][Br2]
(4)Rate = k[CH3COCH3][Br2][H+]2


9. What volume of oxygen gas (O2) measured at 0°C and 1 atm, is needed to burn
completely 1 L of propane gas (C3H8) measured under the same conditions?
(1) 10 L
(2) 7 L
(3) 6 L
(4)5 L


10. Bond dissociation enthalpy of H2, Cl2 and HCl are 434, 242 and 431 kJmol-
respectively. Enthalpy of formation of HCl is
(1) 245 kJmol-1
(2) 93 kJmol-1
(3) -245 kJmol-1
(4) -93 kJmol-1
1

11. Which of the following statements is not correct?
(1) The number of Bravais lattices in which a crystal can be categorized is 14
(2) The fraction of the total volume occupied by the atoms in a primitive cell is 0.48
(3) Molecular solids are generally volatile
(4)The number of carbon atoms in an unit cell of diamond is 4


12. Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What
will be the H+ ion concentration in the mixture?
(1) 1.11 × 10-3 M
(2) 1.11 × 10-4 M
(3) 3.7 × 10-4 M
(4)3.7 × 10-3 M
(5)

13. The values of Kp1 and Kp2 for the reactions

are in ratio of 9:1. If degree of dissociation of X and A be equal, then total pressure at
equilibrium (1) and (2) are in the ratio
(1) 1 : 1
(2) 3 : 1
(3) 1 : 9
(4)36 : 1


14. If the concentration of OH- ions in the reaction

times, then equilibrium 3+ concentration of Fe will increase by
(1) 4 times
(2) 8 times
(3) 16 times
(4) 64 times

15. For the gas phase reaction, conditions is correct?
(1) 
(2) 
(3) 
(4) 
Which of the following

16. The rate constants k1 and k2 for two different reactions are  respectively. The temperature at which k1 = k2 is
(1) 1000/2.303 k
(2) 1000 K
(3) 2000/2.303 k 
(4) 2000 K

17. Standard free energies of formation (in kJ/mol) at 298 K are -237.2, -394.4 and -8.2
(30)for H2O (l), CO2 (g) and pentane (g) respectively. The value of Eocell for the pentane-
oxygen fuel cell is
(1) 0.0968 V
(2) 1.968 V
(3) 2.0968 V
(4) 1.0968 V

18. The dissociation equilibrium of a gas AB2 can be represented as,

The degree of dissociation is 'x' and is small compared to
1. The expression relating the degree of dissociation (x) with equilibrium constant KP and
total pressure P is
(1) 
(2) 
(3) 
(4) 

19. The sequence of ionic mobility in aqueous solution is
(1) Na+ > K+ > Rb+ > Cs+
(2) K+ > Na+ > Rb+ > Cs+
(3) Cs+ > Rb+ > K+ > Na+
(4) Rb+ > K+ > Cs+ > Na+

20. Percentage of free space in a body centred cubic unit cell is
(1) 28%
(2) 30%
(3) 32%
(4) 34%

21. The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr
(24) and Mn (25) is
(1) Ti > V > Cr > Mn
(2) Cr > Mn > V > Ti
(3) V > Mn > Cr > Ti
(4) Mn > Cr > Ti > V

22. How many moles of lead (II) chloride will be formed from a reaction between 6.5 g
of PbO and 3.2 g of HCl?
(1) 0.029
(2) 0.044
(3) 0.333
(4) 0.011

23. Which of the following complexes exhibits the highest paramagnetic behaviour?
Where gly = glycine, en = ethylenediamine and bpy = bipyridyl moities). (At. number Ti= 22, V = 23, Fe = 26, Co = 27)
(1) [Ti(NH3)6]3+
(2) [V (gly)2 (OH)2(NH3)2]+
(3) [Fe(en)(bpy)(NH3)2]2+
(4) [Co(OX)2(OH)2]-


24. Volume occupied by one molecule of water (density = 1 g cm-3) is
(1) 5.5 × 10-23 cm3
(2) 9.0 × 10-23 cm3
(3) 6.023 × 10-23 cm3
(4) 3.0 × 10-23 cm3

25. Number of moles of MnO4- required to oxidize one mole of ferrous oxalate
completely in acidic medium will be
(1) 0.2 moles
(2) 0.6 moles
(3) 0.4 moles
(4) 7.5 moles

26. On the basis of the following E° values, the strongest oxidizing agent is
(1) [Fe(CN)6]3-
(2) [Fe(CN)6]4-
(3) Fe2+
(4) Fe3+

27. The alkali metals from salt-like hydrides by the direct synthesis at elevated
temperature. The thermal stability of these hydrides decreases in which of the follow
orders?
(1) LiH > NaH > KH > RbH > CsH
(2) CsH > RbH > KH > NaH > LiH
(3) KH > NaH > LiH > CsH > RbH
(4) NaH > LiH > KH > RbH > CsH

28. Which one of the following arrangements does not give the correct picture of the
trends indicated against it?
(1) F2 > Cl2 > Br2 > I2 : Electronegativity
(2) F2 > Cl2 > Br2 > I2 : Oxidizing power
(3) F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
(4) F2 > Cl2 > Br2 > I2 : Bond dissociation energy

29. With which one of the following elements silicon should be doped so as to give p-
type of semiconductor?
(1) Boron
(2) Germanium
(3) Arsenic
(4) Selenium

30. In which of the following coordination entities the magnitude of
octahedral field) will be maximum (at. no. Co = 27)?
(1) [Co (C2O4)3]3-
(2) [Co(H2O)6]3+
(3) [Co(NH3)6]3+
(4) [Co(CN)6]3-O (CFSE in

31. The angular shape of molecule (O3) consists of
(1) 2 singma and 1 pi bond
(2) 1 sigma and 2 pi bonds
(3) 2 sigma and 2 pi bonds
(4) 1 sigma and 1 pi bond

32. The correct order of increasing bond angles in the following triatomic species is
(1) 
(2) 
(3) 
(4) 

33. Four diatomic species are listed below the different sequences. Which of these
presents the correct order of their increasing bond order?
(1) 
(2) 
(3) 
(4) 

34. Equimolar solutions of the following were prepared in water separately. Which one
of the solutions will record the highest pH?
(1) CaCl2
(2) SrCl2
(3) BaCl2
(4) MgCl2

35. In the hydrocarbon 
The state of hybridization of carbons 1, 3 and 5 are in the following sequence
(1) sp3, sp2, sp
(2) sp2, sp, sp3
(3) sp, sp3, sp2
(4) sp, sp2, sp3

36. Green chemistry means such reactions which
(1) Study the reactions in plants
(2) Produce colour during reactions
((3) Reduce the use and production of hazardous chemicals
(14) Are related to the depletion of ozone layer

37. A strong base an abstract an
(1) Alkane
(2) Alkene
(3) Amine
(4) Ketone
-hydrogen from

38. How many stereoisomers does the molecules have?
CH3CH = CHCH2CHBrCH3
(1) 2
(2) 4
(3) 6
(4) 8

39. The stability of carbanions in the following

is in the order of
(1) a > c > b > d
(2) a > b > c > d
(3) b > c > d > a
(4) d > b > c > a

40. The relative reactivities of acyl compounds towards nucleophilic substitution are in
the order of
(1) Acyl chloride > Ester > Acid anhydride > Amide
(2) Acyl chloride > Acid anhydride > Ester > Amide
(3) Ester > Acyl chloride > Amide > Acid anhydride
(4) Acid anhydride > Amide > Ester > Acyl chloride

41. Base strength of 

is in the order of
(1) a > b > c
(2) b > a > c
(3) c > b > a
(4) a > c > b

42. 

A (predominantly) is
(1) 
(2) 
(3) 

(4) 

43. In DNA, the complimentary bases are
(1) Uracil and adenine; cytosine and guanine
(2) Adenine and thymine; guanine and cytosine
(3) Adenine and thymine; guanine and uracil
(4) Adenine and guanine; thymine and cytosine

44. Which one the following is most reactive towards electrophilic attack?
(1) 
(2) 
(3) 
(4) 

45. An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis
gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be
(1) CH4O
(2) CH3O
(3) CH2O
(4) CHO

46. In a SN2 substitution reaction of the type 

Which one of the following has the highest relative rate?
(1) CH3CH2Br
(2) 
(3) 
(4) 

47. Acetophenone when reacted with a base, C2H5ONa, yields a stable compound which
has the structure?
(1) 
(2) 
(3) 
(4) 

48. In a reaction of aniline a coloured product C was obtained.

The structure of C would be
(1) 
(2) 
(3) 
(4)  

49. Which of the following statements is not true?
(1) Natural rubber is a 1, 4 - polymer of isoprene
(2) In vulcanization, the formation of sulphur bridges between different chains make
rubber harder and stronger
(3) Natural rubber has the trans-configuration at every double bond
(4) Buna-S is a copolymer of butadiene and styrene

50. Which one of the following is an amine hormone?
(1) Progesterone
(2) Thyroxine
(3) Oxypurin 
(4)  Insulin

 

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