IIT JEE –Past papers<br />CHEMISTRY - UNSOLVED PAPER - 1998<br />
SECTION – I<br />MORE THAN ANSWER  TYPE<br />
01<br />Problem<br />Which of the following  statements(s) is (are)correct when a mixture of<br />                        ...
Problem<br />02<br />Highly pure dilute solution of sodium in liquid ammonia<br />shows blue colour<br />exhibits electric...
Problem<br />03<br />The reaction of                                                    with HBR gives<br />CH3CHBr Ch2   ...
Problem<br />04<br />Chloroaniline and anilinium hydrochloride can be distinguished by<br />Sandmeyer reaction <br />Carby...
Problem<br />05<br />The energy of an electron in the first Bhor orbit of H atom is -13.6eV.The possible energy value(s) o...
Problem<br />06<br />In nitroprusside ion the iron and No exist as rather and NO.these forms can be differentiated by<br /...
Problem<br />07<br />Which of the following statement (s) is (are) correct?<br />The coordination number of each type of i...
08<br />Problem<br />Sodium nitrate decomposes above to give<br />a.<br />b.<br />c.<br />d.<br />
Problem<br />09<br />Which of the following statements(s) is(are)correct with reference to the ferrous and ferric ions?<br...
Problem<br />10<br />Which of the following statement(s) is (are) correct ?<br />The electronic configuration of          ...
Problem<br />11<br />A new carbon-carbon bond formation is possible in<br />Cannizzaro reaction<br />Friedel-Crafts alkyla...
12<br />Problem<br />White phosphorus has<br />sixP-P single bonds<br />four P-P single bonds<br />four lone pairs of elec...
Problem<br />13<br />Which of the following will react with water ?<br />a.<br />b.<br />c.<br />d.<br />
Problem<br />14<br />The standard reduction potential values of three metallic captions, X,Y,Z are 0.52,-3.03 and -1.18 V ...
Problem<br />15<br />Among the following compounds, which will react with acetone to give a product containing ?<br />a.<b...
Problem<br />16<br />Which of the following compounds will show geometrical isomerism?<br />2-butene<br />propane<br />1-p...
17<br />Problem<br />The geometry and the type of hybird orbital present about the central atom in<br />          is<br />...
Problem<br />18<br />Benzyl choride (C6H5C2HCI) can be prepared  from  toluene by chlorination with <br />SO2CI2<br />SOCI...
Problem<br />19<br />Which of the following will undergo aldol condensation?<br />acetaldehyde<br />propanaldehyde<br />be...
Problem<br />20<br />Addition of high proportions of manganese makes steel useful in making rails of railroads, because ma...
Problem<br />21<br />Decrease in atomic number is observed during <br />alpha emission<br />beta emission<br />positron em...
Problem<br />22<br />Benzendiazonium chloride on reaction with phenol in weakly basic medium gives<br />diphenyl ether<br ...
Problem<br />23<br />Among the following compounds, the strongest acid is<br />a.<br />b.<br />c.<br />d.<br />
Problem<br />24<br />For a first order reaction,<br />the degree of dissociation is equal to <br />a polt of reciprocal co...
Problem<br />25<br />Tautomerism is exhibited by<br />a.    <br />b.  <br />c.<br />d.<br />
Problem<br />26<br />According to Graham’s law at a given temperature the ratio of the rates of diffusion                 ...
Problem<br />27<br />For the reaction                                                              at a given temperature ...
Problem<br />28<br />Which of the following statement (s)is (are) correct?<br />The                                       ...
SECTION – II<br />REASON TYPE QUESTION<br />The questions below (29 to40)consist of an assertion in column 1 and the reaso...
Problem<br />29<br />Benzonitrile is prepared by the Cyanide  is a strong nucleophile.reactionof chlorobenzenewith Potassi...
Problem<br />30<br />Fatom has a less negative        Additional electrons are repelled more effectivel<br />electrons  af...
Problem<br />31<br />Nuclide          is less stable than           Nuclides having odd number of protons and <br />neutro...
Problem<br />32<br />                is amphoteric in nature                           bonds canbe broken                 ...
Problem<br />33<br />The value of van der Waals' constant        Hydrogen bonding is present in <br />‘a’ is larger for am...
Problem<br />34<br />       is diamagnetic. The electrons are lost from 4s orbital to form <br />If both assertion and rea...
Problem<br />35<br />Addition of         to 1-butene gives            The product contains one asymmetric <br />     two o...
Problem<br />36<br />The electronic structure of                                     structure is not allowed because octe...
Problem<br />37<br />LiCl is predominantly a covalent  Electro negativity difference between Li <br />     compound       ...
Problem<br />38<br />            is stronger acid than                         In there are two nitrogen-to-oxygen<br />  ...
Problem<br />39<br />Sulphate is estimated as                        Ionic radius of            is smaller than that of   ...
Problem<br />40<br />Acetic acid does not undergo    Acetic acid has no alpha hydrogen's.<br /> halo form reaction.<br />I...
FOR SOLUTION VISIT WWW.VASISTA.NET<br />
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IIT JEE Chemistry 1998

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  • IIT JEE Chemistry 1998

    1. 1. IIT JEE –Past papers<br />CHEMISTRY - UNSOLVED PAPER - 1998<br />
    2. 2. SECTION – I<br />MORE THAN ANSWER TYPE<br />
    3. 3. 01<br />Problem<br />Which of the following statements(s) is (are)correct when a mixture of<br /> is gently warmed with conc. ?<br />A deep red vapour is evolved<br />The vapour when passed into solution gives a yellow solution of <br />Chlorine gas is evolved<br />chromyl vhloride is formed<br />
    4. 4. Problem<br />02<br />Highly pure dilute solution of sodium in liquid ammonia<br />shows blue colour<br />exhibits electrical conductivity <br />productes sodium amide<br />produces hydrogen gas<br />
    5. 5. Problem<br />03<br />The reaction of with HBR gives<br />CH3CHBr Ch2 OH<br />CH3CH2CHBr OH<br />CH3CHBrCH2 Br<br />CH3CH2CHBr Br<br />
    6. 6. Problem<br />04<br />Chloroaniline and anilinium hydrochloride can be distinguished by<br />Sandmeyer reaction <br />Carbylamine test<br />
    7. 7. Problem<br />05<br />The energy of an electron in the first Bhor orbit of H atom is -13.6eV.The possible energy value(s) of the excited state (s) for electrons in Bohr orbits of hydrogen is (are)<br />-3.4eV<br />-4.2eV<br />-6.8eV<br />+6.8eV<br />
    8. 8. Problem<br />06<br />In nitroprusside ion the iron and No exist as rather and NO.these forms can be differentiated by<br />estimating the concentration of iron<br />measuring the concentration of CN<br />measuring the soild state magnetic moment<br />thermally decomposing the compound <br />
    9. 9. Problem<br />07<br />Which of the following statement (s) is (are) correct?<br />The coordination number of each type of ion in CsCl crystal is 8.<br />A metal that crystallizes in bcc structure has a coordination number of 12<br />A unit cell of an ionic crystal shares some of its ions with other unit cells.<br />The length of the unit cell in is 552 pm.<br />
    10. 10. 08<br />Problem<br />Sodium nitrate decomposes above to give<br />a.<br />b.<br />c.<br />d.<br />
    11. 11. Problem<br />09<br />Which of the following statements(s) is(are)correct with reference to the ferrous and ferric ions?<br /> gives brown colour with potassium ferricyanide.<br /> gives blue precipite with potassium ferricyanide<br /> gives red colurwith potassium thiocyanate.<br /> gives brown colur with ammonium thiocyanate.<br />
    12. 12. Problem<br />10<br />Which of the following statement(s) is (are) correct ?<br />The electronic configuration of (Atomic number of Cr=24)<br />The magnetic quantum number may have a negative value.<br />In silver atom,23 electrons have a spin of one type and 24 of the opposite type.(Atomic Number of Ag=47.)<br />The oxidation state of nitrogen in is-3<br />
    13. 13. Problem<br />11<br />A new carbon-carbon bond formation is possible in<br />Cannizzaro reaction<br />Friedel-Crafts alkylation<br />Clemmensen reduction<br />Reimer-Tiemann reaction<br />
    14. 14. 12<br />Problem<br />White phosphorus has<br />sixP-P single bonds<br />four P-P single bonds<br />four lone pairs of electrons <br />PPP angle of <br />
    15. 15. Problem<br />13<br />Which of the following will react with water ?<br />a.<br />b.<br />c.<br />d.<br />
    16. 16. Problem<br />14<br />The standard reduction potential values of three metallic captions, X,Y,Z are 0.52,-3.03 and -1.18 V respectively. The order of reducing power of the corresponding metals is<br />Y > Z > X<br />X > Y > Z<br />Z > Y > X<br />Z > X > Y<br />
    17. 17. Problem<br />15<br />Among the following compounds, which will react with acetone to give a product containing ?<br />a.<br />b.<br />c.<br />d.<br />
    18. 18. Problem<br />16<br />Which of the following compounds will show geometrical isomerism?<br />2-butene<br />propane<br />1-phenylpropene<br />2-methyl-2-butene<br />
    19. 19. 17<br />Problem<br />The geometry and the type of hybird orbital present about the central atom in<br /> is<br />linear,sp<br />trigonal planar, <br />tetrahedral, <br />pyramidal, <br />
    20. 20. Problem<br />18<br />Benzyl choride (C6H5C2HCI) can be prepared from toluene by chlorination with <br />SO2CI2<br />SOCI2<br />CI2<br />NaOCI<br />
    21. 21. Problem<br />19<br />Which of the following will undergo aldol condensation?<br />acetaldehyde<br />propanaldehyde<br />benzaldehyde<br />trideuteroacetaldehyde<br />
    22. 22. Problem<br />20<br />Addition of high proportions of manganese makes steel useful in making rails of railroads, because manganese<br />gives hardness to steel<br />helps the formation of oxides of iron<br />can remove oxygen and sculpture<br />can show highest oxidation state of +7<br />
    23. 23. Problem<br />21<br />Decrease in atomic number is observed during <br />alpha emission<br />beta emission<br />positron emission <br />electron capture<br />
    24. 24. Problem<br />22<br />Benzendiazonium chloride on reaction with phenol in weakly basic medium gives<br />diphenyl ether<br />p-hydroxyazobenzene<br />chlorobenzene<br />benzene<br />
    25. 25. Problem<br />23<br />Among the following compounds, the strongest acid is<br />a.<br />b.<br />c.<br />d.<br />
    26. 26. Problem<br />24<br />For a first order reaction,<br />the degree of dissociation is equal to <br />a polt of reciprocal concentration of the reactant vs.time gives a straight line<br />the time taken for the completion of 75% reaction is thrice the of the reaction<br />the pre-exponential factor in the Arrhenius equation has the dimension of time, <br />
    27. 27. Problem<br />25<br />Tautomerism is exhibited by<br />a. <br />b. <br />c.<br />d.<br />
    28. 28. Problem<br />26<br />According to Graham’s law at a given temperature the ratio of the rates of diffusion of gases A and B is given by <br />a.<br />b.<br />c.<br />d.<br />
    29. 29. Problem<br />27<br />For the reaction at a given temperature the equilibrium amount of can be increased by <br />adding a suitable catalyst<br />adding an inert gas<br />decreasing the volume of the container<br />increasing the amount of <br />
    30. 30. Problem<br />28<br />Which of the following statement (s)is (are) correct?<br />The solution of HCl is 8<br />The conjugate base of <br />Autoprotolysis constant of water increases with temperature<br />When a solution of a weak monoprotic acid is titrated against a strong base,at half-neutralisation point <br />
    31. 31. SECTION – II<br />REASON TYPE QUESTION<br />The questions below (29 to40)consist of an assertion in column 1 and the reason in column 2.Against the specific question number, write in the appropriate space.<br />
    32. 32. Problem<br />29<br />Benzonitrile is prepared by the Cyanide is a strong nucleophile.reactionof chlorobenzenewith Potassium cyanide.<br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    33. 33. Problem<br />30<br />Fatom has a less negative Additional electrons are repelled more effectivel<br />electrons affinity than Cl by 3p elecrons in Cl atom than by ep electrons in <br /> atom. F atom.<br />If both assertion and reason are correct ,and reson is the correct explanation of the assertion.<br />If both assertion and reason are correct,but reason is not the correct eplanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    34. 34. Problem<br />31<br />Nuclide is less stable than Nuclides having odd number of protons and <br />neutrons are generally unstable.<br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct eplanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    35. 35. Problem<br />32<br /> is amphoteric in nature bonds canbe broken with equal ease in .<br />If both assertion and reason are correct ,and reson is the correct explanation of the assertion.<br />If both assertion and reason are correct,but reason is not the correct eplanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    36. 36. Problem<br />33<br />The value of van der Waals' constant Hydrogen bonding is present in <br />‘a’ is larger for ammonia than for nitrogen. ammonia<br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct eplanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    37. 37. Problem<br />34<br /> is diamagnetic. The electrons are lost from 4s orbital to form <br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    38. 38. Problem<br />35<br />Addition of to 1-butene gives The product contains one asymmetric <br /> two optical isomers. carbon. <br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    39. 39. Problem<br />36<br />The electronic structure of structure is not allowed because octet around <br /> is cannot be expanded<br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    40. 40. Problem<br />37<br />LiCl is predominantly a covalent Electro negativity difference between Li <br /> compound and Cl is too small.<br />If both assertion and reason are correct ,and resson is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    41. 41. Problem<br />38<br /> is stronger acid than In there are two nitrogen-to-oxygen<br /> bonds whereas in there is only one.<br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    42. 42. Problem<br />39<br />Sulphate is estimated as Ionic radius of is smaller than that of <br /> and not as . .<br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    43. 43. Problem<br />40<br />Acetic acid does not undergo Acetic acid has no alpha hydrogen's.<br /> halo form reaction.<br />If both assertion and reason are correct ,and reason is the correct explanation of the assertion.<br />If both assertion and reason are correct, but reason is not the correct explanation of the assertion.<br />If assertion is correct but reason is incorrect.<br />If assertion is incorrect but reason is correct.<br />
    44. 44. FOR SOLUTION VISIT WWW.VASISTA.NET<br />

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