Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Some Basic Concepts of Organic Chemistry

98 questions · Chemistry · NEET
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Some Basic Concepts of Organic Chemistry

Some Basic Concepts of Organic Chemistry

98 questions · Chemistry · NEET

  1. How many products (including stereoisomers) are expected from monochlorination of the following compound? Includes diagram2025 · Q105 · MCQ
  2. Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula C4​H8​O is :2025 · Q111 · MCQ
  3. Among the given compounds I-III, the correct order of bond dissociation energy of C-H bond marked with * is : Includes diagram2025 · Q120 · MCQ
  4. Match List-I with List-II Choose the correct answer from the options given below: Includes table2025 · Q128 · MCQ
  5. Which one of the following compounds can exist as cis-trans isomers?2025 · Q130 · MCQ
  6. Match List-I with List-II Choose the correct answer from the options given below : Includes table2025 · Q132 · MCQ
  7. Given below are two statements: Statement I : The boiling point of three isomeric pentanes follows the order n-pentane > isopentane > neopentane Statement II : When branching increases, the molecule attains a shape of sphere. This…2024 · Q105 · MCQ
  8. The most stable carbocation among the following is :2024 · Q110 · MCQ
  9. A compound with a molecular formula of C6​H14​ has two tertiary carbons. Its IUPAC name is :2024 · Q129 · MCQ
  10. On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as2024 · Q133 · MCQ
  11. During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of Fe2+ ion?2024 · Q142 · MCQ
  12. The correct IUPAC name of the compound is : Includes diagram2024 · Q115 · MCQ
  13. A steam volatile organic compound which is immiscible with water has a boiling point of 250∘C. During steam distillation, a mixture of this organic compound and water will boil :2024 · Q132 · MCQ
  14. Match List-I with List-II : Choose the correct answer from the options given below : Includes table2024 · Q138 · MCQ
  15. Methyl group attached to a positively charged carbon atom stabilizes the carbocation due to2024 · Q150 · MCQ
  16. Which amongst the following compounds/species is least basic?2023 · Q110 · MCQ
  17. Which amongst the following compounds will show geometrical isomerism?2023 · Q112 · MCQ
  18. The correct order for the rate of α,β-dehydrohalogenation for the following compounds is _________. Includes diagram2023 · Q114 · MCQ
  19. Given below are two statements: Statement I : In an organic compound, when inductive and electromeric effects operate in opposite directions, the inductive effect predominates. Statement II : Hyperconjugation is observed in o-xylene. In…2023 · Q119 · MCQ
  20. Amongst the given options which of the following molecules/ion acts as a Lewis acid?2023 · Q105 · MCQ
  21. Consider the following compounds/species: The number of compounds/species which obey Huckel's rule is ___________. Includes diagram2023 · Q120 · MCQ
  22. The number of σ bonds, π bonds and lone pair of electrons in pyridine, respectively are:2023 · Q94 · MCQ
  23. In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe3+ due to the formation of-2023 · Q99 · MCQ
  24. Predict the order of reactivity of the following four isomers towards SN2 reaction. (I) CH3CH2CH2CH2Cl (II) CH3CH2CH(Cl)CH3 (III) (CH3)2CHCH2Cl (IV) (CH3)3CCl2022 · Q102 · MCQ
  25. What is the hybridization shown by C1 and C2 carbons, respectively in the given compound? OHC − CH = CH − CH2COOCH32022 · Q118 · MCQ
  26. Which of the following is the most stable carbocation?2022 · Q125 · MCQ
  27. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Chlorine is an electron withdrawing group but it is ortho, para directing in electrophilic aromatic substitution.…2022 · Q98 · MCQ
  28. The incorrect statement regarding chirality is2022 · Q102 · MCQ
  29. The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?2022 · Q105 · MCQ
  30. The correct IUPAC name of the following compound is Includes diagram2022 · Q119 · MCQ
  31. Which compound amongst the following is not an aromatic compound?2022 · Q91 · MCQ
  32. The compound which shows metamerism is :2021 · Q100 · MCQ
  33. Dihedral angle of least stable conformer of ethane is :2021 · Q111 · MCQ
  34. Paper chromatography is an example of :2020 · Q86 · MCQ
  35. A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?2020 · Q93 · MCQ
  36. The compound that is most difficult to protonate is :2019 · Q96 · MCQ
  37. Which of the following is correct with respect to – I effect of the substituents? (R = alkyl)2018 · Q111 · Multiple correct
  38. Which of the following molecules represents the order of hybridisation sp2 , sp2 , sp, sp from left to right atoms?2018 · Q113 · MCQ
  39. Which of the following carbocations is expected to be most stable?2018 · Q114 · MCQ
  40. The correct statement regarding electrophile is2017 · Q103 · MCQ
  41. The IUPAC name of the compound Includes diagram2017 · Q113 · MCQ
  42. The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is2017 · Q114 · MCQ
  43. The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is2016 · Q101 · MCQ
  44. Which among the given molecules can exhibit tautomerism? Includes diagram2016 · Q110 · MCQ
  45. Which of the following statements is not correct for a nucleophile?2015 · Q101 · MCQ
  46. The possible stereo-structures of CH3CHOHCOOH, which are optically active, are called2015 · Q105 · MCQ
  47. The total number of π-bond electrons in the following structure is Includes diagram2015 · Q104 · MCQ
  48. Given : Which of the given compounds can exhibit tautomerism? Includes diagram2015 · Q105 · MCQ
  49. Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?2015 · Q106 · MCQ
  50. In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is2015 · Q107 · MCQ
  51. In which of the following compounds, the C−Cl bond ionisation shall give most stable carbonium ion?2015 · Q108 · MCQ
  52. Consider the following compounds : Hyperconjunction occurs in Includes diagram2015 · Q109 · MCQ
  53. The enolic form of ethyl accetoacetate as shown below has Includes diagram2015 · Q110 · MCQ
  54. In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H2SO4. The percentage of nitrogen in the soil is2014 · Q113 · MCQ
  55. Arrange the following in increasing order of stability Includes diagram2013 · Q115 · MCQ
  56. What is the hybridisation state of benzyl carbonium ion? Includes diagram2013 · Q116 · MCQ
  57. Homolytic fission of the following alkanes forms free radicals CH3 − CH3, CH3 − CH2 − CH3, (CH3)2CH − CH3, CH3 − CH2 −CH(CH3)2. Increasing order of stability of the radicals is2013 · Q118 · MCQ
  58. Which of the following chemical system is non aromatic ?2013 · Q119 · MCQ
  59. Given : I and II are Includes diagram2013 · Q121 · MCQ
  60. The radical, is aromatic because it has Includes diagram2013 · Q112 · MCQ
  61. Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is2013 · Q113 · MCQ
  62. Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?2013 · Q114 · MCQ
  63. The structure of isobutyl group in an organic compound is2013 · Q115 · MCQ
  64. Which nomenclature is not according to IUPAC system?2012 · Q123 · MCQ
  65. Which of the following acids does not exhibit optical isomerism?2012 · Q125 · MCQ
  66. The IUPAC name of the following compound is Includes diagram2011 · Q74 · MCQ
  67. Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear ?2011 · Q119 · MCQ
  68. The correct IUPAC name for the compound is Includes diagram2011 · Q120 · MCQ
  69. Which one of the following is most reactive towards electrophilic reagent?2011 · Q121 · MCQ
  70. Which of the following conformers for ethylene glycol is most stable?2010 · Q51 · MCQ
  71. Which of the following species is not electrophilic in nature?2010 · Q63 · MCQ
  72. The IUPAC name of the compound CH3CH=CHC≡CH is2010 · Q64 · MCQ
  73. Which one of the following is most reactive towards electrophilic reagent?2010 · Q129 · MCQ
  74. In the following the most stable conformation of n-butane is2010 · Q130 · MCQ
  75. The IUPAC name of the compound having the formula CH≡C−CH=CH2 is2009 · Q121 · MCQ
  76. Base strength of is in the order of Includes diagram2008 · Q119 · MCQ
  77. Which one of the following is most reactive towards electrophilic attack?2008 · Q120 · MCQ
  78. The stability of carbanions in the following. is in the order of Includes diagram2008 · Q121 · MCQ
  79. How many stereoisomers does this molecule have? CH3CH=CHCH2CHBrCH32008 · Q96 · MCQ
  80. The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol2007 · Q104 · MCQ
  81. For (i) I−, (ii) Cl−, (iii) Br−, the increasing order of nucleophilicity would be2007 · Q105 · MCQ
  82. If there is no rotation of plane polarised light by a compound in a specific solvent, through to be chiral, it may mean than2007 · Q108 · MCQ
  83. The IUPAC name of is Includes diagram2006 · Q122 · MCQ
  84. Which one of the following pairs represents stereoisomerism?2005 · Q117 · MCQ
  85. Which amongst the following is the most stable carbocation?2005 · Q118 · MCQ
  86. The chirality of the compound Includes diagram2005 · Q119 · MCQ
  87. Names of some compounds are given. Which one is not in IUPAC system?2005 · Q120 · MCQ
  88. The best method for the separation of naphthalene and benzoic acid from their mixture is2005 · Q121 · MCQ
  89. The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom ? Includes diagram2004 · Q111 · MCQ
  90. Name of the compound given below is Includes diagram2003 · Q122 · MCQ
  91. Which one of the following orders of acid strength is correct ?2003 · Q123 · MCQ
  92. Which of the following pairs of compounds are enantiomers?2003 · Q127 · MCQ
  93. Geometrical isomers differ in2002 · Q122 · MCQ
  94. IUPAC name of the following is CH2 = CH − CH2 − CH2 − C ≡ CH2002 · Q123 · MCQ
  95. The incorrect IUPAC name is2001 · Q123 · MCQ
  96. In steam distillation of toluene, the pressure of toluene in vapour is2001 · Q124 · MCQ
  97. The correct acidic order of the following is Includes diagram2001 · Q126 · MCQ
  98. A compound of molecular formula C7H16 shows optical isomerism, compound will be2001 · Q95 · MCQ