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Haloalkanes and Haloarenes

174 questions · Chemistry · JEE Main
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Haloalkanes and Haloarenes

174 questions · Chemistry · JEE Main

  1. Consider the above sequence of reactions. 151 g of 2-bromopentane is made to react. Yield of major product P is 80% whereas Q is 100%. Mass of product Q obtained is ​ g. (Given molar mass in gmol−1H:1,C:12,O:16,Br:80… Includes diagram2025 · 2 Apr · Shift 2 · Q25 · Numerical
  2. In the following series of reactions identify the major products A& B respectively  Includes diagram2025 · 3 Apr · Shift 2 · Q8 · MCQ
  3. Consider the following molecule(X). The major product formed when the given molecule (X) is treated with HBr(1eq) is : Includes diagram2025 · 4 Apr · Shift 2 · Q16 · MCQ
  4. Given below are two statements : Statement (I) : Alcohols are formed when alkyl chlorides are treated with aqueous potassium hydroxide by elimination reaction. Statement (II) : In alcoholic potassium hydroxide, alkyl chlorides form alkenes…2025 · 4 Apr · Shift 2 · Q18 · MCQ
  5. Choose the correct set of reagents for the following conversion. Includes diagram2025 · 8 Apr · Shift 2 · Q17 · MCQ
  6. Which one of the following reactions will not lead to the desired ether formation in major proportion? (iso- Bu⇒ isobutyl, sec −Bu⇒ sec-butyl, nPr⇒n-propyl, tBu⇒ tert-butyl, Et⇒ ethyl) …2025 · 8 Apr · Shift 2 · Q18 · MCQ
  7. 'P' is Includes diagram2025 · 8 Apr · Shift 2 · Q8 · MCQ
  8. Given below are two statements : Statement I : CH3​−O−CH2​−Cl will undergo SN​1 reaction though it is a primary halide. Statement II : will not undergo SN​2… Includes diagram2025 · 22 Jan · Shift 1 · Q2 · MCQ
  9. The maximum number of RBr producing 2-methylbutane by above sequence of reactions is ​ . (Consider the structural isomers only) Includes diagram2025 · 22 Jan · Shift 2 · Q14 · MCQ
  10. Propane molecule on chlorination under photochemical condition gives two di-chloro products, " x" and "y". Amongst "x" and "y", "x " is an optically active molecule. How many tri-chloro products (consider only structural isomers)…2025 · 23 Jan · Shift 1 · Q8 · MCQ
  11. Identify the products [A] and [B], respectively in the following reaction: Includes diagram2025 · 23 Jan · Shift 2 · Q10 · MCQ
  12. The ascending order of relative rate of solvolysis of following compounds is : Includes diagram2025 · 23 Jan · Shift 2 · Q17 · MCQ
  13. Following are the four molecules "P", "Q", "R" and "S". Which one among the four molecules will react with H−Br(aq)​ at the fastest rate? Includes diagram2025 · 24 Jan · Shift 1 · Q19 · MCQ
  14. Given below are two statements: Statement I: The conversion proceeds well in the less polar medium. CH3​−CH2​−CH2​−CH2​−ClHO−​CH3​−CH2​−CH2​−CH2​−OH+Cl(−)… Includes diagram2025 · 24 Jan · Shift 1 · Q5 · MCQ
  15. The structure of the major product formed in the following reaction is : Includes diagram2025 · 24 Jan · Shift 2 · Q5 · MCQ
  16. Consider the following sequence of reactions: 11.25 mg of chlorobenzene will produce ​×10−1mg of product B. (Consider the reactions result in complete conversion.) [Given molar mass of C,H,O,N… Includes diagram2025 · 28 Jan · Shift 1 · Q22 · Numerical
  17. The products A and B in the following reactions, respectively are A⟷Ag−NO2​​CH3​−CH2​−CH2​−BrAgCN​B2025 · 28 Jan · Shift 1 · Q7 · MCQ
  18. The major product of the following reaction is: Includes diagram2025 · 28 Jan · Shift 2 · Q2 · MCQ
  19. Which among the following halides will generate the most stable carbocation in the nucleophilic substitution reaction?2025 · 29 Jan · Shift 2 · Q18 · MCQ
  20. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Haloalkanes react with KCN to form alkyl cyanides as a main product while with AgCN form isocyanide as…2024 · 1 Feb · Shift 1 · Q15 · MCQ
  21. Identify B and C and how are A and C related? Includes diagram2024 · 4 Apr · Shift 1 · Q5 · MCQ
  22. Identify the correct set of reagents or reaction conditions 'X' and 'Y' in the following set of transformation. Includes diagram2024 · 4 Apr · Shift 1 · Q6 · MCQ
  23. CH3​−CH2​−CH2​−Br+NaOHC2​H5​OH​ Product ’A’  Consider the above reactions, identify product B and product C. Includes diagram2024 · 4 Apr · Shift 2 · Q13 · MCQ
  24. Find out the major product formed from the following reaction. [Me:−CH3​] Includes diagram2024 · 4 Apr · Shift 2 · Q18 · MCQ
  25. Product P is Includes diagram2024 · 4 Apr · Shift 2 · Q6 · MCQ
  26. The number of halobenzenes from the following that can be prepared by Sandmeyer's reaction is ​ Includes diagram2024 · 5 Apr · Shift 1 · Q24 · Numerical
  27. Identify the major product in the following reaction. Includes diagram2024 · 5 Apr · Shift 2 · Q7 · MCQ
  28. The ratio of number of oxygen atoms to bromine atoms in the product Q is ​×10−1. Includes diagram2024 · 6 Apr · Shift 2 · Q28 · Numerical
  29. Which among the following compounds will undergo fastest SN2​ reaction.2024 · 8 Apr · Shift 1 · Q7 · MCQ
  30. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : SN​2 reaction of C6​H5​CH2​Br occurs more readily…2024 · 9 Apr · Shift 1 · Q18 · MCQ
  31. In the following sequence of reaction, the major products B and C respectively are : Includes diagram2024 · 9 Apr · Shift 1 · Q20 · MCQ
  32. The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;2024 · 27 Jan · Shift 1 · Q19 · MCQ
  33. Which among the following halide/s will not show SN​1 reaction: (A) H2​C=CH−CH2​Cl(B) CH3​−CH=CH−Cl (C) (D) Choose the most appropriate… Includes diagram2024 · 27 Jan · Shift 2 · Q11 · MCQ
  34. Identify B formed in the reaction. Cl−(CH2​)4​−Cl excess NH3​​ ANaOH​B+H2​O+NaCl2024 · 27 Jan · Shift 2 · Q7 · MCQ
  35. Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom. Reason R : Phenols react with…2024 · 29 Jan · Shift 1 · Q19 · MCQ
  36. Alkyl halide is converted into alkyl isocyanide by reaction with2024 · 29 Jan · Shift 2 · Q20 · MCQ
  37. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : CH2​=CH−CH2​−Cl is an example of allyl halide. Reason (R) : Allyl halides…2024 · 30 Jan · Shift 1 · Q18 · MCQ
  38. Example of vinylic halide is :2024 · 30 Jan · Shift 1 · Q2 · MCQ
  39. The final product A, formed in the following multistep reaction sequence is : Includes diagram2024 · 30 Jan · Shift 1 · Q4 · MCQ
  40. Given below are two statements: Statement - I: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow SN​2 mechanism. Statement - II: A…2024 · 30 Jan · Shift 2 · Q10 · MCQ
  41. 2-chlorobutane +Cl2​→C4​H8​Cl2​(isomers) Total number of optically active isomers shown by C4​H8​Cl2​, obtained in the above reaction is ​…2024 · 30 Jan · Shift 2 · Q29 · Numerical
  42. The total number of hydrogen atoms in product A and product B is ​. Includes diagram2024 · 31 Jan · Shift 1 · Q29 · Numerical
  43. The product (C) in the below mentioned reaction is : CH3​−CH2​−CH2​−BrKOH(alc) ​Δ​AHBr​BΔKOH(aq)​​C…2024 · 31 Jan · Shift 1 · Q9 · MCQ
  44. Identify A and B in the following reaction sequence. Includes diagram2024 · 31 Jan · Shift 2 · Q17 · MCQ
  45. For the reaction The correct statement is Includes diagram2023 · 6 Apr · Shift 1 · Q3 · MCQ
  46. Choose the halogen which is most reactive towards SN​1 reaction in the given compounds (A, B, C & D) Includes diagram2023 · 8 Apr · Shift 1 · Q13 · MCQ
  47. Major product 'P' formed in the following reaction is: Includes diagram2023 · 8 Apr · Shift 2 · Q3 · MCQ
  48. The correct order of reactivity of following haloarenes towards nucleophilic substitution with aqueous NaOH is : Choose the correct answer from the options given below: Includes diagram2023 · 8 Apr · Shift 2 · Q8 · MCQ
  49. Identify the correct order of reactivity for the following pairs towards the respective mechanism Choose the correct answer from the options given below: Includes diagram2023 · 10 Apr · Shift 1 · Q13 · MCQ
  50. The pair from the following pairs having both compounds with net non-zero dipole moment is2023 · 10 Apr · Shift 1 · Q14 · MCQ
  51. Find out the correct statement from the options given below for the above 2 reactions. Includes diagram2023 · 11 Apr · Shift 1 · Q1 · MCQ
  52. Compound from the following that will not produce precipitate on reaction with AgNO3​ is :2023 · 11 Apr · Shift 2 · Q10 · MCQ
  53. In the following reaction 'X' is Includes diagram2023 · 13 Apr · Shift 1 · Q3 · MCQ
  54. The major product formed in the Friedel-Craft acylation of chlorobenzene is2023 · 15 Apr · Shift 1 · Q3 · MCQ
  55. Number of moles of AgCl formed in the following reaction is ​ Includes diagram2023 · 24 Jan · Shift 1 · Q18 · Numerical
  56. Assertion A : Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate of the hydrolysis increases. Reason R : I − is a good nucleophile as well as a good leaving group. In the light of the above…2023 · 24 Jan · Shift 1 · Q4 · MCQ
  57. The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with OH − is2023 · 25 Jan · Shift 1 · Q5 · MCQ
  58. The isomeric deuterated bromide with molecular formula C4​H8​DBr having two chiral carbon atoms is2023 · 25 Jan · Shift 2 · Q6 · MCQ
  59. Identify the correct order for the given property for following compounds. Choose the correct answer from the option given below : Includes diagram2023 · 29 Jan · Shift 1 · Q4 · MCQ
  60. Match List I with List II Choose the correct answer from the options given below : Includes table Includes diagram2023 · 30 Jan · Shift 1 · Q10 · MCQ
  61. Decreasing order towards SN 1 reaction for the following compounds is: Includes diagram2023 · 30 Jan · Shift 2 · Q6 · MCQ
  62. The correct order of melting points of dichlorobenzenes is2023 · 31 Jan · Shift 1 · Q7 · MCQ
  63. In the following halogenated organic compounds, the one with the maximum number of chlorine atoms in its structure is :2023 · 31 Jan · Shift 2 · Q12 · MCQ
  64. In the given reaction sequence, the major product 'C' is : Includes diagram2022 · 24 Jun · Shift 1 · Q7 · MCQ
  65. Consider the above reaction. The number of π electrons present in the product 'P' is ​. Includes diagram2022 · 24 Jun · Shift 2 · Q20 · Numerical
  66. The major product in the reaction Includes diagram2022 · 25 Jun · Shift 1 · Q11 · MCQ
  67. In the presence of sunlight, benzene reacts with Cl2​ to give product, X. The number of hydrogens in X is ​.2022 · 26 Jul · Shift 1 · Q24 · Numerical
  68. Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product?2022 · 26 Jun · Shift 2 · Q10 · MCQ
  69. Major product 'B' of the following reaction sequence is : Includes diagram2022 · 27 Jul · Shift 2 · Q9 · MCQ
  70. The major product of the following reaction is : Includes diagram2022 · 27 Jun · Shift 1 · Q7 · MCQ
  71. The major product in the given reaction is Includes diagram2022 · 28 Jul · Shift 2 · Q7 · MCQ
  72. The major product (P) in the reaction is Includes diagram2022 · 28 Jun · Shift 1 · Q7 · MCQ
  73. Which one of the following compounds is inactive towards SN1 reaction?2022 · 28 Jun · Shift 1 · Q9 · MCQ
  74. The major product of the following reaction contains ​ bromine atom(s). Includes diagram2022 · 28 Jun · Shift 2 · Q20 · Numerical
  75. In the above reaction 'A' is Includes diagram2022 · 28 Jun · Shift 2 · Q9 · MCQ
  76. Considering the above reactions, the compound 'A' and compound 'B' respectively are : Includes diagram2022 · 29 Jul · Shift 1 · Q10 · MCQ
  77. Which among the following pairs of the structures will give different products on ozonolysis? (Consider the double bonds in the structures are rigid and not delocalized.)2022 · 29 Jul · Shift 1 · Q9 · MCQ
  78. Compound 'A' undergoes following sequence of reactions to give compound 'B'. The correct structure and chirality of compound 'B' is [where Et is −C2​H5​] Includes diagram2022 · 29 Jul · Shift 2 · Q10 · MCQ
  79. In the given conversion the compound A is : Includes diagram2022 · 29 Jun · Shift 1 · Q6 · MCQ
  80. Two isomers (A) and (B) with Molar mass 184 g/mol and elemental composition C, 52.2%; H, 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid, respectively on oxidation with KMnO4​. Isomer 'A' is optically active and gives a pale…2022 · 29 Jun · Shift 2 · Q10 · MCQ
  81. The stable carbocation formed in the above reaction is Includes diagram2022 · 29 Jun · Shift 2 · Q9 · MCQ
  82. In the following sequence of reactions, The compounds B and C respectively are :- Includes diagram2021 · 1 Sep · Shift 2 · Q9 · MCQ
  83. The products ''A'' and ''B'' formed in above reactions are : Includes diagram2021 · 16 Mar · Shift 1 · Q13 · MCQ
  84. Identify the reagent(s) 'A' and condition(s) for the reaction Includes diagram2021 · 16 Mar · Shift 2 · Q13 · MCQ
  85. Which of the following reaction is an example of ammonolysis?2021 · 17 Mar · Shift 1 · Q14 · MCQ
  86. The above reaction requires which of the following reaction conditions? Includes diagram2021 · 17 Mar · Shift 1 · Q4 · MCQ
  87. Product ''A'' in the above chemical reaction is : Includes diagram2021 · 17 Mar · Shift 1 · Q6 · MCQ
  88. The correct pair(s) of the ambident nucleophiles is(are) (A) AgCN/KCN (B) RCOOAg/RCOOK (C) AgNO2​/KNO2​ (D) AgI/KI2021 · 17 Mar · Shift 2 · Q5 · MCQ
  89. Reaction of Grignard reagent, C2​H5​MgBr with C8​H8​O followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound B, C10​H13​Cl. The Compound B is :2021 · 18 Mar · Shift 1 · Q3 · MCQ
  90. Main products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are :2021 · 18 Mar · Shift 2 · Q12 · MCQ
  91. Given below are two statements : Statement I : C2​H5​OH and AgCN both can generate nucleophile. Statement II : KCN and AgCN both will generate nitrile nucleophile with all reaction conditions. Choose the most appropriate option :2021 · 18 Mar · Shift 2 · Q4 · MCQ
  92. The product formed in the first step of the reaction of with excess Mg/Et2​O (Et=C2​H5​) is Includes diagram2021 · 24 Feb · Shift 1 · Q13 · MCQ
  93. What is the major product formed by HI on reaction with Includes diagram2021 · 24 Feb · Shift 1 · Q9 · MCQ
  94. Identify A and B in the chemical reaction. Includes diagram2021 · 25 Feb · Shift 1 · Q7 · MCQ
  95. The given reaction can occur in the presence of : (a) Bromine water (b) Br2​ in CS2​, 273 K (c) Br2​/FeBr3​ (d) Br2​ in CHCl3​, 273 K Choose the correct answer from the options gien below : Includes diagram2021 · 25 Jul · Shift 1 · Q5 · MCQ
  96. Excess of isobutane on reaction with Br2​ in presence of light at 125 ∘ C gives which one of the following, as the major product?2021 · 26 Aug · Shift 1 · Q12 · MCQ
  97. The major product formed in the following reaction is : Includes diagram2021 · 26 Aug · Shift 1 · Q5 · MCQ
  98. Among the following compounds I-IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO3​ (iii) AgNO3​? Includes diagram2021 · 26 Aug · Shift 1 · Q9 · MCQ
  99. Consider the given reaction, the product A is : Includes diagram2021 · 26 Aug · Shift 2 · Q12 · MCQ
  100. A chloro compound "A". (i) forms aldehydes on ozonolysis followed by the hydrolysis. (ii) when vaporized completely 1.53 g of A, gives 448 mL of vapour at STP. The number of carbon atoms in a molecule of compound A is ​…2021 · 26 Aug · Shift 2 · Q22 · Numerical
  101. For the given reaction What is 'A'? Includes diagram2021 · 26 Feb · Shift 1 · Q1 · MCQ
  102. For the given reaction : What is 'A'? Includes diagram2021 · 26 Feb · Shift 1 · Q8 · MCQ
  103. Match List - I with List - II. Choose the correct answer from the options given below : Includes diagram2021 · 26 Feb · Shift 2 · Q9 · MCQ
  104. In the following sequence of reactions the P is : Includes diagram2021 · 27 Aug · Shift 1 · Q11 · MCQ
  105. The major product (A) formed in the reaction given below is : Includes diagram2021 · 27 Aug · Shift 2 · Q7 · MCQ
  106. The correct order of reactivity of the given chlorides with acetate in acetic acid is :2021 · 31 Aug · Shift 1 · Q1 · MCQ
  107. The major product of the following reaction is : Includes diagram2021 · 31 Aug · Shift 2 · Q12 · MCQ
  108. Which of the following compunds will show retention in configuration on nucleophilic substitution by OH– ion?2020 · 2 Sep · Shift 1 · Q11 · MCQ
  109. The major product obtained from E2 - elimination of 3-bromo-2-fluoropentane is2020 · 2 Sep · Shift 2 · Q19 · MCQ
  110. Consider the reaction sequence given below: Which of the following statements is true? Includes diagram2020 · 2 Sep · Shift 2 · Q21 · MCQ
  111. The mechanism of SN1​ reaction is given as : A student writes general characteristics based on the given mechanism as : (a) The reaction is favoured by weak nucleophiles. (b) R+ would be easily formed if the substituents are bulky.… Includes diagram2020 · 3 Sep · Shift 1 · Q12 · MCQ
  112. The major product in the following reaction is : Includes diagram2020 · 3 Sep · Shift 2 · Q10 · MCQ
  113. The decreasing order of reactivity of the following compounds towards nucleophilic substitution (SN2) is : Includes diagram2020 · 3 Sep · Shift 2 · Q9 · MCQ
  114. The decreasing order of reactivity of the following organic molecules towards AgNO3​ solution is : Includes diagram2020 · 4 Sep · Shift 1 · Q1 · MCQ
  115. Which of the following compounds will form the precipitate with aq. AgNO3​ solution most readily?2020 · 4 Sep · Shift 2 · Q12 · MCQ
  116. Among the following compounds, which one has the shortest C – Cl bond?2020 · 4 Sep · Shift 2 · Q5 · MCQ
  117. The major product formed in the following reaction is : CH3​CH=CHCH(CH3​)2​ HBr​2020 · 5 Sep · Shift 2 · Q18 · MCQ
  118. The increasing order of the boiling points of the major products A, B and C of the following reactions will be : Includes diagram2020 · 6 Sep · Shift 2 · Q12 · MCQ
  119. 1- methyl ethylene oxide when treated with an excess of HBr produces :2020 · 7 Jan · Shift 1 · Q16 · MCQ
  120. For the following reactions Ks and Ke, are respectively, the rate constants for substitution and elimination and μ=ke​ks​​ the correct options is Includes diagram2020 · 7 Jan · Shift 2 · Q10 · MCQ
  121. Consider the following reactions : Which of these reactions are possible ? Includes diagram2020 · 7 Jan · Shift 2 · Q16 · MCQ
  122. The decreasing order of reactivity towards dehydrohalogenation (E1) reaction of the following compounds is : Includes diagram2020 · 8 Jan · Shift 1 · Q11 · MCQ
  123. Which of these will produce the highest yield in Friedel Crafts reaction?2020 · 9 Jan · Shift 1 · Q19 · MCQ
  124. Which of the following reactions will not produce a racemic product?2020 · 9 Jan · Shift 2 · Q2 · MCQ
  125. The major product of the following reaction is: Includes diagram2019 · 8 Apr · Shift 2 · Q12 · MCQ
  126. Which one of the following alkenes when treated with HCl yields majorly an anti Markovnikov product?2019 · 8 Apr · Shift 2 · Q15 · MCQ
  127. The major product in the following reaction is : Includes diagram2019 · 8 Apr · Shift 2 · Q23 · MCQ
  128. The major product of the following reaction is : Includes diagram2019 · 9 Jan · Shift 1 · Q1 · MCQ
  129. The compounds A and B in the following reaction are, respectively : Includes diagram2019 · 9 Jan · Shift 1 · Q4 · MCQ
  130. The major product of the following reaction is : Includes diagram2019 · 9 Jan · Shift 1 · Q8 · MCQ
  131. Increasing rate of SN1 reaction in the following compounds is : Includes diagram2019 · 10 Apr · Shift 1 · Q22 · MCQ
  132. The major product of the following reaction is : Includes diagram2019 · 10 Apr · Shift 1 · Q4 · MCQ
  133. The major product 'Y' in the following reactions is : Includes diagram2019 · 10 Apr · Shift 2 · Q14 · MCQ
  134. The major product obtained in the given reaction is : Includes diagram2019 · 10 Apr · Shift 2 · Q22 · MCQ
  135. Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light ? Includes diagram2019 · 10 Jan · Shift 1 · Q11 · MCQ
  136. Which of the following compounds will produce a precipitate with AgNO3​ ?2019 · 11 Jan · Shift 2 · Q1 · MCQ
  137. An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options : Assertion (A) : Vinyl halides do not undergo nucleophilic substitution easily. Reason (R) : Even though the intermediate carbocation is…2019 · 12 Apr · Shift 2 · Q21 · MCQ
  138. Which one of the following is likely to give a precipitate with AgNO3​ solution ?2019 · 12 Apr · Shift 2 · Q3 · MCQ
  139. Heating of 2-chloro-1-phenylbutane with EtOK/EtOH gives X as the major product. Reaction of X with Hg(OAc)2​/H2​O followed by NaBH4​ gives Y as the major product. Y is :2019 · 12 Apr · Shift 2 · Q8 · MCQ
  140. The major product in the following conversion is – Includes diagram2019 · 12 Jan · Shift 2 · Q21 · MCQ
  141. The major product of the following reaction is : Includes diagram2018 · 16 Apr · Shift 1 · Q2 · MCQ
  142. The most polar compound among the following is :2018 · 16 Apr · Shift 1 · Q3 · MCQ
  143. The major product of the following reaction is: Includes diagram2018 · Shift 0 · Q9 · MCQ
  144. The major product of the following reaction is : Includes diagram2017 · 8 Apr · Shift 1 · Q1 · MCQ
  145. The major product of the following reaction is : Includes diagram2017 · 8 Apr · Shift 1 · Q12 · MCQ
  146. Which of the following compounds will not undergo Friedel Craft’s reaction with benzene ?2017 · 8 Apr · Shift 1 · Q5 · MCQ
  147. In the following reaction sequence : The compound I is : Includes diagram2017 · 9 Apr · Shift 1 · Q4 · MCQ
  148. The major product obtained in the following reaction is : Includes diagram2017 · Shift 0 · Q5 · MCQ
  149. Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolorize the colour of bromine?2017 · Shift 0 · Q6 · MCQ
  150. 3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is :2017 · Shift 0 · Q7 · MCQ
  151. The increasing order of the reactivity of the following halides for the SN1 reaction is : Includes diagram2017 · Shift 0 · Q8 · MCQ
  152. Which one of the following reagents is not suitable for the elimination reaction ? Includes diagram2016 · 10 Apr · Shift 1 · Q5 · MCQ
  153. Bromination of cyclohexene under conditions given below yields : Includes diagram2016 · 10 Apr · Shift 1 · Q7 · MCQ
  154. The synthesis of alkyl fluorides is best accomplished by:2015 · Shift 0 · Q14 · MCQ
  155. In SN2​ reactions, the correct order of reactivity for the following compounds: CH3​Cl, CH3​CH2Cl, (CH3​)2​CHCl and (CH3​)3​CCl is:2014 · Shift 0 · Q16 · MCQ
  156. The major organic compound formed by the reaction of 1, 1, 1– trichloroethane with silver powder is:2014 · Shift 0 · Q9 · MCQ
  157. A solution of (–l) – chloro –1 – phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5​, due to the formation of :2013 · Shift 0 · Q17 · MCQ
  158. Compound (A),C8​H9​Br, gives a white precipitate when warmed with alcoholic AgNO3​. Oxidation of (A) gives an acid (B),C8​H6​O4​.(B) easily forms anhydride on…2013 · Shift 0 · Q6 · MCQ
  159. Iodoform can be prepared from all except :2012 · Shift 0 · Q12 · MCQ
  160. What is DDT among the following?2012 · Shift 0 · Q13 · MCQ
  161. How many chiral compounds are possible on monochlorination of 2–methyl butane ?2012 · Shift 0 · Q14 · MCQ
  162. Consider the following bromides : The correct order of SN​1 reactive is Includes diagram2010 · Shift 0 · Q13 · MCQ
  163. Which of the following on heating with aqueous KOH, produces acetaldehyde ?2009 · Shift 0 · Q12 · MCQ
  164. The organic chloro compound, which shows complete stereochemical inversion during a SN2 reaction, is2008 · Shift 0 · Q17 · MCQ
  165. Which of the following is the correct order of decreasing SN2 reactivity?2007 · Shift 0 · Q19 · MCQ
  166. Fluorobenzene (C6​H5​F) can be synthesized in the laboratory2006 · Shift 0 · Q13 · MCQ
  167. Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces2006 · Shift 0 · Q14 · MCQ
  168. The structure of the major product formed in the following reaction is Includes diagram2006 · Shift 0 · Q22 · MCQ
  169. Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of2005 · Shift 0 · Q48 · MCQ
  170. Elimination of bromine from 2-bromobutane results in the formation of-2005 · Shift 0 · Q49 · MCQ
  171. Alkyl halides react with dialkyl copper reagents to give2005 · Shift 0 · Q50 · MCQ
  172. The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is2004 · Shift 0 · Q14 · MCQ
  173. Bottles containing C6​H5​l and C6​H5​CH2​I lost their original labels. They were labelled A and B for testing A and B were separately taken in test tubes and boiled with NaOH solution. The end solution in each tube was made acidic…2003 · Shift 0 · Q22 · MCQ
  174. The reaction : (CH)3​C−BrH2​O​(CH)3​C−OH2002 · Shift 0 · Q15 · MCQ