Organic Chemistry - Some Basic Principles and Techniques

JEE Advanced · Chemistry · 84 past questions

1. Q1 2026 Paper 1

   Considering LiBH$_4$ reduces an ester group to the corresponding alcohol and does not reduce a carboxylic… (with a figure)

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2. Q2 2026 Paper 1

   In the following reaction sequence, Q, R, S and T are the major products. The correct statement(s) about Q… (with a figure)

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3. Q3 2026 Paper 2

   Natural rubber on complete ozonolysis (O$_3$/Zn-H$_2$O) gives compound **X** as the major product. **X**… (with a figure)

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4. Q4 2025 Paper 1

   The reaction sequence given below is carried out with 16 moles of **X**. The yield of the major product in… (with a figure)

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5. Q5 2024 Paper 1

   Reaction of iso-propylbenzene with O$_2$ followed by the treatment with H$_3$O$^+$ forms phenol and a… (with a figure)

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6. Q6 2024 Paper 1

   In the following reaction sequence, the major product $\mathbf{P}$ is formed.… (with a figure)

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7. Q7 2024 Paper 1

   List-I contains various reaction sequences and List-II contains the possible products. Match each entry in… (with a figure)

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8. Q8 2024 Paper 1

   List-I contains various reaction sequences and List-II contains different phenolic compounds. Match each… (with a figure)

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9. Q9 2024 Paper 2

   The option(s) with correct sequence of reagents for the conversion of P to Q is(are) (with a figure)

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10. Q10 2024 Paper 2

    An organic compound **P** having molecular formula $\mathrm{C_6H_6O_3}$ gives ferric chloride test and does…

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11. Q11 2023 Paper 1

    In the following reactions, P, Q, R, and S are the major products.… (with a figure)

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12. Q12 2023 Paper 1

    Consider the following reaction scheme and choose the correct option(s) for the major products Q, R and S. (with a figure)

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13. Q13 2023 Paper 1

    The total number of $sp^2$ hybridised carbon atoms in the major product **P** (a non-heterocyclic compound)… (with a figure)

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14. Q14 2023 Paper 1

    The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned… (with a figure)

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15. Q15 2022 Paper 1

    Consider the following reaction.… (with a figure)

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16. Q16 2022 Paper 1

    If the reaction sequence given below is carried out with 15 moles of acetylene, the amount of the product… (with a figure)

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17. Q17 2022 Paper 1

    Considering the reaction sequence given below, the correct statement(s) is(are) (with a figure)

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18. Q18 2021 Paper 1

    Among the following, the conformation that corresponds to the most stable conformation of… (with a figure)

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19. Q19 2021 Paper 1

    The maximum number of possible isomers (including stereoisomers) which may be formed on *mono*-bromination of…

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20. Q20 2021 Paper 2

    The reaction sequence(s) that would lead to $o$-xylene as the major product is(are) (with a figure)

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21. Q21 2020 Paper 1

    Newman projections $\mathbf{P}$, $\mathbf{Q}$, $\mathbf{R}$ and $\mathbf{S}$ are shown below… (with a figure)

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22. Q22 2020 Paper 2

    An organic compound ($\mathrm{C_8H_{10}O_2}$) rotates plane-polarized light. It produces pink color with…

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23. Q23 2019 Paper 2

    Total number of hydroxyl groups present in a molecule of the major product P is____ (with a figure)

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24. Q24 2019 Paper 2

    Total number of isomers, considering both structural and stereoisomers, of cyclic ethers with the molecular…

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25. Q25 2018 Paper 1

    PARAGRAPH "X"… (with a figure)

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26. Q26 2018 Paper 1

    PARAGRAPH "X"… (with a figure)

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27. Q27 2018 Paper 1

    PARAGRAPH "A"… (with a figure)

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28. Q28 2017 Paper 1

    The IUPAC name(s) of the following compound is(are) (with a figure)

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29. Q29 2017 Paper 1

    Answer Q.34, Q.35 and Q.36 by appropriately matching the information given in the three columns of the…

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30. Q30 2017 Paper 1

    Answer Q.34, Q.35 and Q.36 by appropriately matching the information given in the three columns of the…

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31. Q31 2017 Paper 1

    Answer Q.34, Q.35 and Q.36 by appropriately matching the information given in the three columns of the…

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32. Q32 2016 Paper 2

    The correct order of acidity for the following compounds is (with a figure)

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33. Q33 2016 Paper 2

    The major product of the following reaction sequence is (with a figure)

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34. Q34 2016 Paper 2

    Treatment of compound O with $KMnO_4/H^+$ gave P, which on heating with ammonia gave Q. The compound Q on… (with a figure)

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35. Q35 2016 Paper 2

    Treatment of compound O with $KMnO_4/H^+$ gave P, which on heating with ammonia gave Q. The compound Q on… (with a figure)

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36. Q36 2015 Paper 1

    The total number of stereoisomers that can exist for M is (with a figure)

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37. Q37 2015 Paper 1

    Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is(are) (with a figure)

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38. Q38 2015 Paper 1

    In the following reaction, the major product is (with a figure)

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39. Q39 2014 Paper 2

    Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the… (with a figure)

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40. Q40 2014 Paper 2

    For the identification of $\beta$-naphthol using dye test, it is necessary to use

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41. Q41 2014 Paper 2

    Paragraph For Question 31 and 32… (with a figure)

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42. Q42 2014 Paper 2

    Paragraph For Question 31 and 32… (with a figure)

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43. Q43 2014 Paper 2

    Different possible thermal decomposition pathways for peroxyesters are shown below. Match each pathway from… (with a figure)

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44. Q44 2013 Paper 1

    The compound that does NOT liberate $CO_2$, on treatment with aqueous sodium bicarbonate solution, is

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45. Q45 2013 Paper 1

    $KI$ in acetone, undergoes $S_N2$ reaction with each of $P$, $Q$, $R$ and $S$. The rates of the reaction vary… (with a figure)

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46. Q46 2013 Paper 1

    The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to

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47. Q47 2013 Paper 1

    The total number of carboxylic acid groups in the product $P$ is (with a figure)

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48. Q48 2013 Paper 2

    Paragraphs for Questions 35 and 36… (with a figure)

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49. Q49 2013 Paper 2

    Match the chemical conversions in List I with the appropriate reagents in List II and select the correct… (with a figure)

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50. Q50 2012 Paper 1

    The carboxyl functional group (–COOH) is present in

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51. Q51 2012 Paper 1

    Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction… (with a figure)

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52. Q52 2012 Paper 2

    The major product **H** of the given reaction sequence is (with a figure)

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53. Q53 2012 Paper 2

    With reference to the scheme given, which of the given statment(s) about T, U, V and W is (are) correct ? (with a figure)

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54. Q54 2012 Paper 2

    Which of the given statement(s) about N, O, P and Q with respect to M is (are) correct ? (with a figure)

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55. Q55 2011 Paper 1

    Among the following compounds, the most acidic is

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56. Q56 2011 Paper 1

    The major product of the following reaction is (with a figure)

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57. Q57 2011 Paper 1

    Amongst the given options, the compound(s) in which all the atoms are in one plane in all the possible… (with a figure)

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58. Q58 2011 Paper 2

    The maximum number of isomers (including stereoisomers) that are possible on monochlorination of the… (with a figure)

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59. Q59 2011 Paper 2

    The total number of contributing structures showing hyperconjugation (involving C-H bonds) for the following… (with a figure)

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60. Q60 2010 Paper 1

    In the Newman projection for 2,2-dimethylbutane, X and Y can respectively be (with a figure)

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61. Q61 2010 Paper 1

    The total number of cyclic isomers possible for a hydrocarbon with the molecular formula $C_4H_6$ is

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62. Q62 2010 Paper 2

    In the reaction shown, the structure of the product T is (with a figure)

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63. Q63 2009 Paper 1

    The correct acidity order of the following is (with a figure)

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64. Q64 2009 Paper 1

    The IUPAC name of the following compound is (with a figure)

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65. Q65 2009 Paper 1

    The correct statement(s) about the compound $\mathrm{H_3C(HO)HC-CH=CH-CH(OH)CH_3}$ (X) is(are)

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66. Q66 2009 Paper 1

    Paragraph for Question Nos. 16 to 18… (with a figure)

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67. Q67 2009 Paper 1

    Paragraph for Question Nos. 16 to 18… (with a figure)

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68. Q68 2009 Paper 1

    Match each of the compounds in Column I with its characteristic reaction(s) in Column II.

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69. Q69 2009 Paper 2

    In the following carbocation, H/CH$_3$ that is most likely to migrate to the positively charged carbon is (with a figure)

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70. Q70 2009 Paper 2

    Match each of the compounds given in Column I with the reaction(s), that they can undergo, given in Column II. (with a figure)

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71. Q71 2009 Paper 2

    The total number of cyclic structural as well as stereo isomers possible for a compound with the molecular…

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72. Q72 2008 Paper 1

    Hyperconjugation involves overlap of the following orbitals

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73. Q73 2008 Paper 1

    The major product of the following reaction is (with a figure)

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74. Q74 2008 Paper 1

    The correct statement(s) about the compound given below is (are) (with a figure)

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75. Q75 2008 Paper 1

    The correct statement(s) concerning the structures E, F and G is (are) (with a figure)

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76. Q76 2008 Paper 1

    Paragraph for Question Nos. 61 to 63… (with a figure)

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77. Q77 2008 Paper 1

    Paragraph for Question Nos. 61 to 63… (with a figure)

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78. Q78 2008 Paper 2

    The correct stability order for the following species is (with a figure)

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79. Q79 2008 Paper 2

    In the following reaction sequence, the correct structures of E, F and G are… (with a figure)

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80. Q80 2008 Paper 2

    STATEMENT-1: Aniline on reaction with NaNO$_2$/HCl at 0 °C followed by coupling with $\beta$-naphthol gives a…

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81. Q81 2008 Paper 2

    Paragraph for Question Nos. 58 to 60… (with a figure)

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82. Q82 2007 Paper 2

    The number of stereoisomers obtained by bromination of trans-2-butene is

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83. Q83 2007 Paper 2

    STATEMENT-1: Molecules that are not superimposable on their mirror images are chiral.…

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84. Q84 2007 Paper 2

    Match the compounds/ions in Column I with their properties/reactions in Column II. Indicate your answer by…

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