aipmt–Past papers<br />CHEMISTRY- UNSOLVED PAPER - 2008<br />
SECTION – I (Total Marks : 50)<br />Single Correct Answer Type<br />There are five parts in this question. Four choices ar...
01<br />Problem<br />Which one of the following arrangements does not give the correct picture of the tends indicated agai...
Problem<br />02<br />If a gas expand at a constant temperature, it indicate that<br />Kinetic energy of molecule remain th...
Problem<br />03<br />The dissociation equilibrium of a gas AB2 can be represented as:<br />                               ...
Problem<br />04<br /> The bromination of acetone that occurs in acid solution is represented by this equation             ...
Problem<br />Based on these data, the rate equation is<br />a.<br />b.<br />c.<br />d.<br />
Problem<br />05<br />If the concentration of OH- ions in the reaction<br />Is decreased by 1/4times, then equilibrium conc...
Problem<br />06<br />What volume of            measured at            & 1 atm, is needed to burn completely 1L of propane ...
Problem<br />07<br />Equal volume of three acids solutions of pH 3, 4 & 5 are mixed in a vessel. What will be the ion conc...
Problem<br />08<br />The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of<br ...
Problem<br />09<br />In DNA, the complimentary bases are <br />Adenine & Guanine; thymine & Cytosine<br />Uracil & Adenine...
Problem<br />10<br />Base strength of<br />  is in order of<br />(i)> (iii)> (ii)<br />(i)> (ii) > (iii)<br />(i)> (i)> (i...
Problem<br />11<br />Equimolar solution of the following were prepare in water separately. Which one of the solution will ...
Problem<br />12<br />The sequence of ionic mobility in aqueous solution is<br />a.<br />b.<br />c.<br />d. <br />
Problem<br />13<br />If uncertainty in position & momentum are equal, then uncertainty in velocity is<br />a.<br />b.<br /...
Problem<br />14<br />How many stereoisomer’s does this molecule have?<br />CH3CH=CHCH2CHBrCH3<br />8<br />2<br />4<br />6<...
Problem<br />15<br />On the basis of the following values, the shortest oxidizing agent is<br />a.<br />b.<br />c.<br />d....
Problem<br />16<br />The correct order of decreasing second ionization enthalpy of Ti (22), V (23), Cr<br />(24) & Mn (25)...
Problem<br />17<br />Which  one of the following is most reactive towards electrophilic attack ?<br />a.<br />b.<br />c.<b...
Problem<br />18<br />Four diatomic species are listed below in different sequences. Which of these presence the correct or...
Problem<br />19<br />How many moles of lead (II) chloride will be formed from a reaction between 6.5g of PbO & 3.2b HCl ?<...
Problem<br />20<br />The stability of carbanions in the followings is in the order of<br />(i)    RC = C<br />(ii)   R2C =...
Problem<br />21<br /> Acetophenone when reacted with a base,                 , yields stable compound which has the struct...
Problem<br />22<br />Volume occupied by 1 molecule of water (density= 1g ) is<br />a.<br />b.<br />c.<br />d.<br />
Problem<br />23<br />Bond dissociation enthalpy of                       are 434,242 & 431 respectably. Enthalpy of format...
Problem<br />24<br />Which of the following complexes exhibits the highest paramagnetic behavior ?<br />a.<br />b.<br />c....
Problem<br />25<br />Which one of the following statement is not true?<br />Buna-S is a copolymer of butadiene & styrene.<...
Problem<br />26<br />In a reaction of aniline a coloured product C was obtained<br />The structure of C would be<br />a.<b...
Problem<br />27<br />Which of the following condition are correct?<br />a.<br />b.<br />c.<br />d.<br />
Problem<br />28<br />The measurement of the electron position is associated with an uncertainty in momentum, which is equa...
Problem<br />29<br />The angular shape of ozone molecule consists of<br />a.<br />b.<br />c.<br />d. <br />
Problem<br />30<br />Percentage of free space in a body centered cubic units cell is<br />34%<br />28%<br />30%<br />32%<b...
Problem<br />31<br />The value of equilibrium constant of the reaction <br />Is 8.0. the equilibrium constant of the react...
Problem<br />32<br />The values of Kp1 & Kp2 for the reaction<br />Are in the ratio 9:1. If degree of dissociation of X & ...
Problem<br />33<br />Are in the ratio 9:1. If degree of dissociation of X & A be equal, the total pressure at equilibrium ...
Problem<br />34<br />Which of the following is an amine hormone?<br />Insulin<br />Progesterone<br />Thyroxine<br />Oxypur...
Problem<br />35<br />Kohilrausch’s laws states that at<br />Infinity dilution, each ion makes definite contribution to con...
Problem<br />36<br />Green chemistry means such reaction which<br />Are related to the depletion of ozone layer<br />Study...
Problem<br />37<br />Which of the following question is not correct?<br />The number of carbon atoms in a unit cell of dia...
Problem<br />38<br />In a substitution reaction of the type<br />Which one of the following has the highest relative rate?...
Problem<br />39<br />The correct order of increasing bond angle in the following triatomic species is<br />a.<br />b.<br /...
Problem<br />40<br />With which one of the following  elements silicon should be doped so as to give p-type of semiconduct...
Problem<br />41<br />A (predominantly) is<br />a.<br />b.<br />c.<br />d.<br />
Problem<br />42<br /> An organic compound contains C, H & O. its elemental analysis gave C, 38.71% & H, 9.67%. The empiric...
Problem<br />43<br />In which of the following coordination entities the magnitude of      (CFSE is octahedral field) will...
Problem<br />44<br />The alkali metals from salt-like hydrides by the direct synthesis at elevated temperature. The therma...
Problem<br />45<br />Which of the following are not state function?<br />(i)q+w  (ii)q  (iii)w  (iv)H-TS<br />i), (ii) & (...
Problem<br />46<br />In the hydrocarbon, <br />The state of hybridization of carbon 1, 3 & 5 are in the following sequence...
Problem<br />47<br />Number of moles of  required to oxidize one mole of ferrous oxalate completely in acidic medium will ...
Problem<br />48<br />The rate constants                   for two different reactions are ,               respectively. Th...
Problem<br />49<br />A strong base can abstract an α-hydrogen from<br />Keton<br />Alkane<br />Alkene<br />Amine<br />
Problem<br />50<br />Standard free energies of formation (in kJ/mol) at 298K are -237.2, -394.4 & -8.2 for                ...
For solution visit www.vasista.net<br />
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  • AIPMT Chemistry 2008

    1. 1. aipmt–Past papers<br />CHEMISTRY- UNSOLVED PAPER - 2008<br />
    2. 2. SECTION – I (Total Marks : 50)<br />Single Correct Answer Type<br />There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate<br />
    3. 3. 01<br />Problem<br />Which one of the following arrangements does not give the correct picture of the tends indicated against it?<br />a.<br />b. <br />c.<br />d.<br />
    4. 4. Problem<br />02<br />If a gas expand at a constant temperature, it indicate that<br />Kinetic energy of molecule remain the same<br />Number of molecule of gas increase<br />Kinetic energy of molecule decrease<br />Pressure of the gas increase<br />
    5. 5. Problem<br />03<br />The dissociation equilibrium of a gas AB2 can be represented as:<br /> The degree of dissociation is x & is smaller compared to 1. The expression to 1. The expressing relating the degree of dissociation (x) with equilibrium constant & total pressure P is<br />a.<br />b.<br />c.<br />d. <br />
    6. 6. Problem<br />04<br /> The bromination of acetone that occurs in acid solution is represented by this equation These kinetic data were obtained for given reaction concentration. Initial concentration, M Initial rate, disappearance of<br />Initial rate, disappearance of <br />a.<br />b.<br />c.<br />d.<br />
    7. 7. Problem<br />Based on these data, the rate equation is<br />a.<br />b.<br />c.<br />d.<br />
    8. 8. Problem<br />05<br />If the concentration of OH- ions in the reaction<br />Is decreased by 1/4times, then equilibrium concentration of will increased by<br />64 times<br />times<br />8 times<br />16 times<br />
    9. 9. Problem<br />06<br />What volume of measured at & 1 atm, is needed to burn completely 1L of propane gas measured under the same conditions?<br />5L<br />10L<br />7L<br />6L<br />
    10. 10. Problem<br />07<br />Equal volume of three acids solutions of pH 3, 4 & 5 are mixed in a vessel. What will be the ion concentration in the mixture?<br />a.<br />b.<br />c.<br />d.<br />
    11. 11. Problem<br />08<br />The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of<br />Acid anhydrite > Amide >Ester > Acyl chloride<br />Acyl chloride > Ester > Acid anhydrite > Amide<br />Acyl chloride > Acid anhydrite > Ester > Amide<br />Ester > Acyl chloride > Amide> Acid anhydrite<br />
    12. 12. Problem<br />09<br />In DNA, the complimentary bases are <br />Adenine & Guanine; thymine & Cytosine<br />Uracil & Adenine; Cytosine & Guanine<br />Adenine & thymine; Guanine & Cytosine<br />Adenine & thymine; Guanine & Uracil<br />
    13. 13. Problem<br />10<br />Base strength of<br /> is in order of<br />(i)> (iii)> (ii)<br />(i)> (ii) > (iii)<br />(i)> (i)> (iii)<br />(iii)> (ii) > (i) <br />
    14. 14. Problem<br />11<br />Equimolar solution of the following were prepare in water separately. Which one of the solution will record the highest pH?<br />a.<br />b.<br />c.<br />d.<br />
    15. 15. Problem<br />12<br />The sequence of ionic mobility in aqueous solution is<br />a.<br />b.<br />c.<br />d. <br />
    16. 16. Problem<br />13<br />If uncertainty in position & momentum are equal, then uncertainty in velocity is<br />a.<br />b.<br />c.<br />d.<br />
    17. 17. Problem<br />14<br />How many stereoisomer’s does this molecule have?<br />CH3CH=CHCH2CHBrCH3<br />8<br />2<br />4<br />6<br />
    18. 18. Problem<br />15<br />On the basis of the following values, the shortest oxidizing agent is<br />a.<br />b.<br />c.<br />d.<br />
    19. 19. Problem<br />16<br />The correct order of decreasing second ionization enthalpy of Ti (22), V (23), Cr<br />(24) & Mn (25) is<br />Mn > Cr> Ti>V<br />Ti > V > Cr > Mn<br />Cr > Mn > V > Ti<br />V > Mn > Cr > Ti<br />
    20. 20. Problem<br />17<br />Which one of the following is most reactive towards electrophilic attack ?<br />a.<br />b.<br />c.<br />d.<br />
    21. 21. Problem<br />18<br />Four diatomic species are listed below in different sequences. Which of these presence the correct order of there increasing bond order?<br />a.<br />b.<br />c.<br />d.<br />
    22. 22. Problem<br />19<br />How many moles of lead (II) chloride will be formed from a reaction between 6.5g of PbO & 3.2b HCl ?<br />0.011<br />0.029<br />0.044<br />0.333<br />
    23. 23. Problem<br />20<br />The stability of carbanions in the followings is in the order of<br />(i) RC = C<br />(ii) R2C = CH<br />(iii) <br />(iv) R3C - CH2<br />(iv)> (ii)>(iii)>(i)<br /> >(iii) > (ii)> (iv)<br /> > (ii)> (iii) >(iv)<br />(ii)> (iii) >(iv)> (i)<br />
    24. 24. Problem<br />21<br /> Acetophenone when reacted with a base, , yields stable compound which has the structure<br />a.<br />b.<br />c.<br />d.<br />
    25. 25. Problem<br />22<br />Volume occupied by 1 molecule of water (density= 1g ) is<br />a.<br />b.<br />c.<br />d.<br />
    26. 26. Problem<br />23<br />Bond dissociation enthalpy of are 434,242 & 431 respectably. Enthalpy of formation HCl is <br />a.<br />b.<br />c.<br />d.<br />
    27. 27. Problem<br />24<br />Which of the following complexes exhibits the highest paramagnetic behavior ?<br />a.<br />b.<br />c.<br />d.<br />
    28. 28. Problem<br />25<br />Which one of the following statement is not true?<br />Buna-S is a copolymer of butadiene & styrene.<br />Natural rubber is a 1, 4-polymer of isoprene.<br />In vulcanization, the formation of sulphur bridges between different chains make rubber harder & stronger.<br />Natural rubber has the trans-configuration at every double bond.<br />
    29. 29. Problem<br />26<br />In a reaction of aniline a coloured product C was obtained<br />The structure of C would be<br />a.<br />b.<br />c.<br />d. <br />
    30. 30. Problem<br />27<br />Which of the following condition are correct?<br />a.<br />b.<br />c.<br />d.<br />
    31. 31. Problem<br />28<br />The measurement of the electron position is associated with an uncertainty in momentum, which is equal to . The uncertainty in electron velocity is (mass of an electron is ).<br />a.<br />b.<br />c.<br />d.<br />
    32. 32. Problem<br />29<br />The angular shape of ozone molecule consists of<br />a.<br />b.<br />c.<br />d. <br />
    33. 33. Problem<br />30<br />Percentage of free space in a body centered cubic units cell is<br />34%<br />28%<br />30%<br />32%<br />
    34. 34. Problem<br />31<br />The value of equilibrium constant of the reaction <br />Is 8.0. the equilibrium constant of the reaction will be<br />16<br />1/8<br />1/16<br />1/64<br />
    35. 35. Problem<br />32<br />The values of Kp1 & Kp2 for the reaction<br />Are in the ratio 9:1. If degree of dissociation of X & A be equal, the total pressure at equilibrium (i) & (ii) are in the ratio <br />36:1<br />1:1<br />3:1<br />1:9<br />
    36. 36. Problem<br />33<br />Are in the ratio 9:1. If degree of dissociation of X & A be equal, the total pressure at equilibrium (i) & (ii) are in the ratio <br />36:1<br />1:1<br />3:1<br />1:9<br />
    37. 37. Problem<br />34<br />Which of the following is an amine hormone?<br />Insulin<br />Progesterone<br />Thyroxine<br />Oxypurin<br />
    38. 38. Problem<br />35<br />Kohilrausch’s laws states that at<br />Infinity dilution, each ion makes definite contribution to conductance of an electrolyte what ever be the nature of the other ion of the electrolyte.<br />Infinity dilution, each ion makes definite contribution to equivalent conductance of an electrolyte what ever be the nature of the other ion of the electrolyte.<br />Finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte what ever be the nature of the other ion of the electrolyte.<br />Infinity dilution, each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte.<br />
    39. 39. Problem<br />36<br />Green chemistry means such reaction which<br />Are related to the depletion of ozone layer<br />Study the reaction in plants<br />Produce colour during reactions<br />Reduce the use and production of hazardous chemicals<br />
    40. 40. Problem<br />37<br />Which of the following question is not correct?<br />The number of carbon atoms in a unit cell of diamond is 4.<br />The number of bravaislattics in which a crystal can be categorize is 14<br />The fraction of the total volume occupied by the atoms in a primitive cell is 0.48<br />Molecular solids are generally volatile.<br />
    41. 41. Problem<br />38<br />In a substitution reaction of the type<br />Which one of the following has the highest relative rate?<br />a.<br />b.<br />c.<br />d.<br />
    42. 42. Problem<br />39<br />The correct order of increasing bond angle in the following triatomic species is<br />a.<br />b.<br />c.<br />d.<br />
    43. 43. Problem<br />40<br />With which one of the following elements silicon should be doped so as to give p-type of semiconductor ?<br />Selenium<br />Boron<br />Germanium<br />Arsenic<br />
    44. 44. Problem<br />41<br />A (predominantly) is<br />a.<br />b.<br />c.<br />d.<br />
    45. 45. Problem<br />42<br /> An organic compound contains C, H & O. its elemental analysis gave C, 38.71% & H, 9.67%. The empirical formula of the compound would be<br />a.CHO<br />b.<br />c.<br />d.<br />
    46. 46. Problem<br />43<br />In which of the following coordination entities the magnitude of (CFSE is octahedral field) will be maximum?<br />a.<br />b.<br />c.<br />d.<br />
    47. 47. Problem<br />44<br />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 following orders?<br />NaH > LiH >KH > RbH > CsH<br />LiH > NaH > KH > RbH > CsH<br />CsH > RbH > KH > NaH > LiH<br />KH > NaH > LiH > CsH > RbH<br />
    48. 48. Problem<br />45<br />Which of the following are not state function?<br />(i)q+w (ii)q (iii)w (iv)H-TS<br />i), (ii) & (iii)<br />& (iii)<br />& (vi)<br />(ii), (iii) & (vi)<br />
    49. 49. Problem<br />46<br />In the hydrocarbon, <br />The state of hybridization of carbon 1, 3 & 5 are in the following sequence<br />a.<br />b.<br />c.<br />d.<br />
    50. 50. Problem<br />47<br />Number of moles of required to oxidize one mole of ferrous oxalate completely in acidic medium will be<br />7.5moles<br />0.2 moles<br />0.6 moles<br />0.4 moles<br />
    51. 51. Problem<br />48<br />The rate constants for two different reactions are , respectively. The temperature at which is<br />2000 K<br />1000/2.303K<br />1000K<br />2000/2.303K<br />
    52. 52. Problem<br />49<br />A strong base can abstract an α-hydrogen from<br />Keton<br />Alkane<br />Alkene<br />Amine<br />
    53. 53. Problem<br />50<br />Standard free energies of formation (in kJ/mol) at 298K are -237.2, -394.4 & -8.2 for respectively. The value of for the pentane – oxygen fuel cell is<br />1.0968 V<br />0.0968V<br />1.968V<br />2.0968V<br />
    54. 54. For solution visit www.vasista.net<br />

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