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Organic Reaction Mechanism and Synthetic Applications

100 questions · Chemistry · IIT JAM
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Organic Reaction Mechanism and Synthetic Applications

100 questions · Chemistry · IIT JAM

  1. The major product of the following transformation is Includes diagram2025 · Q18 · MCQ
  2. The major products P and Q of the following transformations are Includes diagram2025 · Q19 · MCQ
  3. Pericyclic reactions involved in the synthesis of Vitamin D₂ from Ergosterol are Includes diagram2025 · Q21 · MCQ
  4. The major product in the following reaction sequence is Includes diagram2025 · Q22 · MCQ
  5. The major products P and Q of the following reactions are Includes diagram2025 · Q25 · MCQ
  6. The set(s), in which all the compounds yield *achiral* products upon treatment with CH3MgBr/ether followed by hydrolysis with dilute mineral acid, is(are)2025 · Q36 · Multiple correct
  7. The reaction(s) that will yield cyclic product is(are)2025 · Q37 · Multiple correct
  8. The major product formed in the following reaction is Includes diagram2024 · Q11 · MCQ
  9. The major product formed in the following reaction is Includes diagram2024 · Q12 · MCQ
  10. In the following reaction optically pure ester X formed product that did not exhibit optical rotation ([α]D​=0) due to the formation of (Note: Ts = *para*-toluenesulfonyl; Ac = acetyl) Includes diagram2024 · Q14 · MCQ
  11. The major products **X** and **Y** in the following reactions respectively, are Includes diagram2024 · Q15 · MCQ
  12. The major product formed in the following reaction is Includes diagram2024 · Q18 · MCQ
  13. The suitable reagent combination for the following transformation is Includes diagram2024 · Q2 · MCQ
  14. The suitable synthetic route(s) for the following transformation is/are Includes diagram2024 · Q31 · Multiple correct
  15. The compound(s) which on reaction with CH₃MgBr followed by treatment with aqueous NH₄Cl would produce 1-methyl-1-phenylethanol as the major product is/are2024 · Q32 · Multiple correct
  16. A reaction of 10.50 g of 1,2-diphenylethane-1,2-dione with conc. NaOH followed by aqueous acidic work-up furnished 8.55 g of a carboxylic acid. The yield of the carboxylic acid in this reaction is ​ %. (rounded off…2024 · Q51 · Numerical
  17. The structure of Q in the following reaction scheme is Includes diagram2023 · Q1 · MCQ
  18. The major product **Y** in the following reaction scheme is Includes diagram2023 · Q14 · MCQ
  19. The major product of the reaction is Includes diagram2023 · Q15 · MCQ
  20. The major product of the reaction is Includes diagram2023 · Q16 · MCQ
  21. The major product of the reaction is (i) CH2​I2​ Zn-Cu (ii) Li, NH3 (liq.) (iii) H3​O+ Includes diagram2023 · Q2 · MCQ
  22. X and Y in the following reactions, respectively, are EtOH+2H2​SO4​→X+H3​O++HSO4−​HNO3​+2H2​SO4​→Y+H3​O++2HSO4−​…2023 · Q28 · MCQ
  23. The rate of addition of 1-hexyl radical to the given molecules follows the order Includes diagram2023 · Q3 · MCQ
  24. The reaction(s) that yield(s) Ph-CH2-CH2-CO2Me as the major product is/are2023 · Q33 · Multiple correct
  25. The correct option(s) of the reagents required for the following reaction is/are Includes diagram2023 · Q34 · Multiple correct
  26. The major product of the reaction is Includes diagram2023 · Q4 · MCQ
  27. The molecular weight of the major product of the reaction is ​ (in integer). (i) Br₂ (excess), CH₃CO₂H (ii) Sn/HCl (iii) NaNO₂/HCl (excess), 0 °C (iv) CuBr (excess) [Given: atomic weight of H = 1, C = 12, N = 14,… Includes diagram2023 · Q41 · Numerical
  28. The amount of ethane produced in the following reaction is ​ kg. C2​H4​(2 kg)+H2​(2 kg)Wilkinson’s Catalyst​C2​H6​ (90% catalytic conversion)…2023 · Q59 · Numerical
  29. The reagent required for the following transformation is2022 · Q1 · MCQ
  30. The major product formed in the following reaction is Includes diagram2022 · Q11 · MCQ
  31. The major product formed in the reaction of (2S,3R)-2-chloro-3-phenylbutane with NaOEt in EtOH is2022 · Q13 · MCQ
  32. The reactivity of the enol derivatives towards benzaldehyde follows the order2022 · Q15 · MCQ
  33. Among the following, the reaction(s) that favor(s) the formation of the products at 25 °C is/are2022 · Q31 · Multiple correct
  34. The compound(s) that participate(s) in Diels-Alder reaction with maleic anhydride is/are2022 · Q33 · Multiple correct
  35. Among the following, the suitable route(s) for the conversion of benzaldehyde to acetophenone is/are2022 · Q34 · Multiple correct
  36. The reaction of 122 g of benzaldehyde with 108 g of phenylhydrazine gave 157 g of the product. The yield of the product is ​ %. (round off to the nearest integer)2022 · Q44 · Numerical
  37. Which one of the following options is best suited for effecting the transformation? HO CHO HO CO_{2}H2022 · Q5 · MCQ
  38. The major product formed in the following reaction sequence is Includes diagram2021 · Q18 · MCQ
  39. The products **P**, **Q**, **R** and **S** formed in the following reactions are Includes diagram2021 · Q19 · MCQ
  40. The reaction that produces the following as a major product is Includes diagram2021 · Q21 · MCQ
  41. The major product formed in the following reaction is Includes diagram2021 · Q22 · MCQ
  42. The major product formed in the following reaction is Includes diagram2021 · Q23 · MCQ
  43. Hantzsch pyridine synthesis involves several steps. Some of those are2021 · Q35 · Multiple correct
  44. The compound(s), which give(s) benzoic acid on oxidation with KMnO4​, is (are)2021 · Q36 · Multiple correct
  45. The products P and Q formed in the reaction are Includes diagram2021 · Q37 · MCQ
  46. The major product formed in the following reaction is Includes diagram2021 · Q5 · MCQ
  47. The major product formed in the following reaction is Includes diagram2021 · Q6 · MCQ
  48. The major product formed in the following reaction is Includes diagram2021 · Q8 · MCQ
  49. The major product formed in the following reaction sequence is Includes diagram2020 · Q15 · MCQ
  50. For the radical chain reaction below, the correct classification for step 2 and step 3 is, respectively, Step 1: Br2​+M⟶2Br∙+M Step 2: Br∙+H2​⇌HBr+H∙…2020 · Q2 · MCQ
  51. The major product formed in the following reaction is Includes diagram2020 · Q25 · MCQ
  52. The rate of solvolysis of I–IV follows Includes diagram2020 · Q26 · MCQ
  53. The major product formed in the following reaction sequence is Includes diagram2020 · Q28 · MCQ
  54. For the Diels-Alder reactions I–IV, the activation barriers follow the order Includes diagram2020 · Q29 · MCQ
  55. The major product formed in the following reaction is Includes diagram2020 · Q30 · MCQ
  56. The correct sequence of reactions for the synthesis of the following molecule is(are) Includes diagram2020 · Q39 · Multiple correct
  57. The organometallic reagent(s) among the following is(are)2020 · Q40 · Multiple correct
  58. Treatment of formic acid with concentrated sulfuric acid gives2020 · Q8 · MCQ
  59. The major product of the following reaction is Includes diagram2019 · Q24 · MCQ
  60. The major product of the following reaction is Includes diagram2019 · Q27 · MCQ
  61. The correct option for the product(s) of the following reaction is Includes diagram2019 · Q28 · MCQ
  62. The compound(s) formed as intermediate(s) in the following reaction sequence is/are Includes diagram2019 · Q37 · Multiple correct
  63. 5.3 g of benzaldehyde was reacted with an excess of acetophenone to produce 5.2 g of the enone product as per the reaction shown below. The yield of the reaction is ​ %. (Round off to the nearest integer) (MW =… Includes diagram2019 · Q59 · Numerical
  64. Assume that the reaction of MeMgBr with ethylacetate proceeds with 100% conversion to give tert-butanol. The volume of 0.2 M solution of MeMgBr required to convert 10 mL of a 0.025 M solution of ethylacetate to tert-butanol is ​…2019 · Q60 · Numerical
  65. The correct option for the major products of the following reaction is (* represents isotopically labelled carbon atom) Includes diagram2019 · Q8 · MCQ
  66. The major product formed in the following reaction is Includes diagram2019 · Q9 · MCQ
  67. The CORRECT order of stability for the following carbocations is I II III IV Includes diagram2018 · Q17 · MCQ
  68. The product X in the following reaction sequence is Includes diagram2018 · Q20 · MCQ
  69. The major product formed in the following reaction is Includes diagram2018 · Q21 · MCQ
  70. The major products Y and Z in the following reaction sequence are Includes diagram2018 · Q22 · MCQ
  71. The CORRECT statement(s) about carbene is(are)2018 · Q36 · Multiple correct
  72. The major product formed in the following reaction is Includes diagram2018 · Q5 · MCQ
  73. The correct set of reagents for the following conversion is Includes diagram2017 · Q20 · MCQ
  74. The product R in the following reaction is Includes diagram2017 · Q21 · MCQ
  75. The major product S of the following reaction is Includes diagram2017 · Q22 · MCQ
  76. In the following reaction, the major product T is Includes diagram2017 · Q23 · MCQ
  77. The following conversion is carried out using Includes diagram2017 · Q24 · MCQ
  78. In the following reactions, the major products E and F, respectively, are Includes diagram2017 · Q25 · MCQ
  79. The INCORRECT statement(s) among the following is/are2017 · Q36 · Multiple correct
  80. The following conversion is an example of Includes diagram2017 · Q37 · Multiple correct
  81. The correct order of rate of solvolysis for the following compounds is2017 · Q5 · MCQ
  82. In the following sequence of reactions, the overall yield (%) of O is Includes diagram2017 · Q6 · MCQ
  83. The major products X and Y in the following reaction sequence are Includes diagram2016 · Q13 · MCQ
  84. The major product formed in the reaction of butanenitrile with phenylmagnesium bromide followed by acidification is2016 · Q14 · MCQ
  85. The major product formed in the following reaction is Includes diagram2016 · Q2 · MCQ
  86. The mechanism of the following transformation involves Includes diagram2016 · Q3 · MCQ
  87. The appropriate reagents required for carrying out the following transformation are Includes diagram2016 · Q33 · Multiple correct
  88. The appropriate reagents required for carrying out the following transformation are Includes diagram2016 · Q34 · Multiple correct
  89. Hydrolysis of 15.45 g of benzonitrile produced 10.98 g of benzoic acid. The percentage yield of acid formed is __.2016 · Q43 · Numerical
  90. Among the following, the number of compounds, which can participate as 'diene' component in a Diels-Alder reaction is __. Includes diagram2016 · Q52 · Numerical
  91. The set of products formed in the following reaction is Includes diagram2015 · Q17 · MCQ
  92. The correct set of reagents required for the following transformation is Includes diagram2015 · Q18 · MCQ
  93. Which of the following statements are correct for S N​ Ar reaction? (i) Follows second order kinetics (ii) KH​/KD​>1 (iii) Involves carbanion-type intermediate (iv) Involves two transition states2015 · Q21 · MCQ
  94. The major product formed in the following reaction is Includes diagram2015 · Q23 · MCQ
  95. Identify the correct reagents required for the following transformation Includes diagram2015 · Q29 · MCQ
  96. Which of the following statement(s) is/are true about the reaction given below? Includes diagram2015 · Q34 · Multiple correct
  97. The reaction(s) which give(s) phenol is/are2015 · Q35 · Multiple correct
  98. The amount (in grams) of NaOH (MW=40) required for complete neutralization of one mole of the following compound is ​ Includes diagram2015 · Q45 · Numerical
  99. The major product formed in the following reaction is Includes diagram2015 · Q5 · MCQ
  100. The ene-yne that produces a chiral compound upon treatment with Lindlar’s catalyst is2015 · Q7 · MCQ