Quelpr

Functional Group Analysis, Reactions and Mechanisms · CAPE Chemistry Unit 2

185 past-paper questions on Functional Group Analysis, Reactions and Mechanisms, part of The Chemistry of Carbon Compounds, from every CAPE Chemistry Unit 2 paper on Quelpr.

Practise Functional Group Analysis, Reactions and Mechanisms
  1. 2(b)(ii)2 marks· CAPE Chemistry Unit 2 · 2006 · Paper 2State the observation when aqueous silver nitrate is added to a sample of aqueous sodium chloride followed by ammonia solution.
  2. 2(b)(iii)1 mark· CAPE Chemistry Unit 2 · 2006 · Paper 2State the observation when warm concentrated sulphuric acid is added to solid potassium iodide.
  3. 6(b)(ii)4 marks· CAPE Chemistry Unit 2 · 2006 · Paper 2When acidified potassium chromate(VI) is added to an aqueous chloride, P, it changes from orange to green. P can also be used to change nitrobenzene (C₆H₅NO₂) to phenylamine (C₆H₅NH₂). Identify P and explain its role in…
  4. 8(c)(i)1 mark· CAPE Chemistry Unit 2 · 2006 · Paper 2What would be a suitable solvent for this process?
  5. 8(c)(ii)1 mark· CAPE Chemistry Unit 2 · 2006 · Paper 2Suggest a reason for the use of fine chips.
  6. 9(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2006 · Paper 2Briefly describe the principles involved in cracking.
  7. 9(b)2 marks· CAPE Chemistry Unit 2 · 2006 · Paper 2Give a balanced equation to illustrate cracking.
  8. 2(a)5 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Complete Table 1 by filling in the missing reaction products and observations: (i) reaction product for NaCl, (ii) reaction product for NaBr, (iii) observation for SO2, (iv) reaction product for NaI, and (v) observation…
  9. 2(c)4 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Write a balanced equation for the reaction of chlorine with an excess of cold dilute sodium hydroxide, and state the change in oxidation state of chlorine in the reaction.
  10. 5(a)(i)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Determine the order of the hydrolysis reaction with respect to R-X using Table 3.
  11. 5(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Determine the order of the hydrolysis reaction with respect to NaOH using Table 3.
  12. 5(b)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Deduce the overall order of the reaction and construct the rate equation for the hydrolysis.
  13. 5(c)3 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Calculate the value of the rate constant and state its units.
  14. 5(d)3 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Suggest a possible mechanism for the hydrolysis of the primary halogenoalkane and use the representative structure to illustrate the steps involved.
  15. 5(e)(i)3 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Use collision theory to state and explain the effect of temperature on the rate of a reaction.
  16. 5(e)(ii)3 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Use collision theory to state and explain the effect of concentration on the rate of a reaction.
  17. 5(e)(iii)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Use collision theory to state and explain the effect of surface area on the rate of a reaction.
  18. 1(a)5 marks· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Suggest reagents to be used in EACH of the transformations (i), (ii), (iii), (iv), and (v).
  19. 1(b)(i)1.33 marks· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Draw the structure for the monosubstituted product formed from the reaction of chlorine with benzene.
  20. 1(b)(ii)1.33 marks· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Draw the structure(s) for the monosubstituted product(s) formed from the reaction of chlorine with methylbenzene.
  21. 1(b)(iii)1.34 marks· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Draw the structure for the monosubstituted product formed from the reaction of chlorine with nitrobenzene.
  22. 1(c)(i)1 mark· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Suggest a reason for the position of the chlorine on the benzene ring in the product of benzene.
  23. 1(c)(ii)1 mark· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Suggest a reason for the position of the chlorine on the benzene ring in the product(s) of methylbenzene.
  24. 1(c)(iii)1 mark· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Suggest a reason for the position of the chlorine on the benzene ring in the product of nitrobenzene.
  25. 1(d)3 marks· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2List benzene, methylbenzene, and nitrobenzene in order of increasing ease of reactivity with chlorine (least reactive first), and explain your answer.
  26. 6(c)2 marks· CAPE Chemistry Unit 2 · 2008 (T&T) · Paper 2Write an equation for the oxidation of alcohol (ethanol) to ethanal.
  27. 1(a)(i)1 mark· CAPE Chemistry Unit 2 · 2009 · Paper 2Draw the structural formula for intermediate X in the reaction scheme.
  28. 1(a)(ii)1 mark· CAPE Chemistry Unit 2 · 2009 · Paper 2State the condition required for Stage I.
  29. 1(a)(iii)1 mark· CAPE Chemistry Unit 2 · 2009 · Paper 2State the reagent required for Stage II.
  30. 1(c)(i)1 mark· CAPE Chemistry Unit 2 · 2009 · Paper 2Write the formula of intermediate Y.
  31. 1(c)(ii)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2State the reagents and condition required for Stage III.
  32. 1(c)(iii)1 mark· CAPE Chemistry Unit 2 · 2009 · Paper 2Name the reagent used to dissolve the phenol in Stage IV.
  33. 1(c)(iv)1 mark· CAPE Chemistry Unit 2 · 2009 · Paper 2State the colour of the azo dye when phenol is used in Stage IV.
  34. 1(a)(i)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2State the reagents and/or conditions required for reaction I (converting A to D).
  35. 1(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2State the reagents and/or conditions required for reaction II (converting A to E).
  36. 1(b)(i)1 mark· CAPE Chemistry Unit 2 · 2010 · Paper 2Draw the structural formula of compound B.
  37. 1(b)(ii)1 mark· CAPE Chemistry Unit 2 · 2010 · Paper 2Draw the structural formula of compound C.
  38. 4(d)(i)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Explain what is meant by the term 'cracking'.
  39. 4(d)(ii)a)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Write the chemical equation for the cracking of octane, C8H18, into two hydrocarbon fragments containing the same number of carbon atoms.
  40. 4(d)(ii)b)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Describe a simple laboratory test to distinguish between the two hydrocarbon fragments formed from cracking octane.
  41. 1(a)5 marks· CAPE Chemistry Unit 2 · 2011 · Paper 2Complete Table 1 by indicating simple test tube reactions to distinguish between each given pair of compounds and recording the expected observations.
  42. 1(b)(i)4 marks· CAPE Chemistry Unit 2 · 2011 · Paper 2Show the steps involved in the mechanism of the reaction between A and sodium hydroxide using curved arrows to show the movement of electrons.
  43. 1(b)(ii)1 mark· CAPE Chemistry Unit 2 · 2011 · Paper 2State the name of the reaction mechanism outlined in (b)(i).
  44. 1(c)(i)4 marks· CAPE Chemistry Unit 2 · 2011 · Paper 2State the reagent(s) used for the conversion at EACH step (Step 1, Step 2, and Step 3).
  45. 1(c)(ii)1 mark· CAPE Chemistry Unit 2 · 2011 · Paper 2Name the process which occurs in Step 3 of the reaction.
  46. 3(b)(i)1 mark· CAPE Chemistry Unit 2 · 2011 · Paper 2Define the term 'cracking'.
  47. 3(b)(ii)1 mark· CAPE Chemistry Unit 2 · 2011 · Paper 2Define the term 'reforming'.
  48. 3(c)2 marks· CAPE Chemistry Unit 2 · 2011 · Paper 2Write the balanced equation representing the cracking of octane to produce two hydrocarbons, one of which is butane.
  49. Q51 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1In the reaction between ethene and bromine, which statements about the reaction mechanism are true? I. A carbocation forms in the rate determining step. II. A dative covalent bond forms between the bromide ion and the…
  50. Q61 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1Which of the following alcohols will NOT be oxidised by acidified potassium dichromate(VI)?
  51. Q71 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1The equation for the formation of the anaesthetic, \text{CF}_3\text{CHBrCl}, is \text{CF}_3\text{CH}_2\text{Cl} \xrightarrow{\text{Br}_2} \text{CF}_3\text{CHBrCl} The type of reaction occurring is
  52. Q81 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1Ethanol can be formed by the following reaction \text{C}_2\text{H}_5\text{I} + \text{NaOH} \rightarrow \text{C}_2\text{H}_5\text{OH} + \text{NaI} The mechanism used is
  53. Q91 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1Which statements are correct concerning Compound A? I. It will decolourize aqueous bromine. II. It will decolourize cold, acidified potassium permanganate. III. It will produce a silver mirror with Tollen's reagent.
  54. Q101 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1Which of the following compounds does NOT give a white precipitate when shaken with cold ethanolic silver nitrate?
  55. Q121 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1Hydrogen cyanide is more likely to add to ethanal but not to ethene because
  56. 1(d)4 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Describe the expected observation when EACH isomer in (a) is treated with acidified potassium permanganate.
  57. 1(e)1 mark· CAPE Chemistry Unit 2 · 2012 · Paper 2State the colour change with K2Cr2O7/H+(aq) which would indicate a positive result.
  58. 4(a)(i)1.5 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Give the structural formula for the product of the reaction of Compound A with aqueous bromine.
  59. 4(a)(ii)1.5 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Give the structural formula for the product of the reaction of Compound A with liquid bromine.
  60. 4(a)(iii)1.5 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Give the structural formula for the product of the reaction of Compound A with cold KMnO4/H+.
  61. 4(a)(iv)1.5 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Give the structural formula for the product of the reaction of Compound A with hot KMnO4/H+.
  62. 4(d)5 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Outline the mechanism for the reaction between Compound A and HBr, using curved arrows to show the movement of electrons.
  63. 4(e)1 mark· CAPE Chemistry Unit 2 · 2012 · Paper 2State the type of reaction mechanism outlined in (d).
  64. Q31 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1An electrophile has
  65. Q41 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Which of the following terms does NOT describe a nucleophile?
  66. Q61 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Item 6 refers to the following information. A substance reacts with I. \text{NaOH} to form an ionic product II. \text{PCl}_5, giving off \text{HCl} III. \text{H}_2 in the presence of a nickel catalyst IV.…
  67. Q71 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Methylbenzene, \text{C}_6\text{H}_5\text{CH}_3, can react to produce 4-chloromethylbenzene (p-chlorotoluene). Which of the following reagents and conditions are MOST suitable for the reaction?
  68. Q81 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Diazonium salts are useful in the synthesis of aromatic compounds. Which of the compounds below can be prepared from a diazonium salt?
  69. Q91 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1A compound, X, reacts with I. 2,4-dinitrophenylhydrazine (DNPH) to give an orange precipitate II. Tollen's reagent to give a silver mirror III. aqueous alkaline iodine to give yellow crystals. Compound X is MOST likely
  70. Q101 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Which of the following compounds will NOT decolourize bromine water but will decolourize potassium manganate(VII) on warming?
  71. 1(a)(i)2 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2Draw the chemical structures of the products formed at P from the alkaline hydrolysis of Compound X.
  72. 1(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2Draw the chemical structures of the products formed at Q from the transesterification reaction of Compound X with methanol and sodium hydroxide.
  73. 1(a)(iii)a)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Identify the process which leads to the formation of the products at P.
  74. 1(a)(iii)b)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Identify the process which leads to the formation of the products at Q.
  75. 1(a)(iv)a)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2State a use of the non-alcoholic product formed at P.
  76. 1(a)(iv)b)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2State a use of the non-alcoholic product formed at Q.
  77. 1(b)(i)a)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2State the observation when 1.0 cm³ of Z is treated with 2,4-DNPH, given the inference that Z is a carbonyl compound.
  78. 1(b)(i)b)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2State the observation when 1.0 cm³ of Z is heated with acidified KMnO4, given the inference that Z reduces KMnO4.
  79. 1(b)(i)c)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2State the inference when 1.0 cm³ of Z gives a silver mirror with Tollen's reagent.
  80. 1(b)(i)d)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2State the inference when 1.0 cm³ of Z shows no reaction with Fehling's solution.
  81. 1(c)2 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2Outline the mechanism for the reaction between a carbonyl compound and HCN, using curved arrows to show electron movement.
  82. 4(a)(ii)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Draw the structure of the organic product formed when phenol reacts with Br2(aq) (reaction (ii)).
  83. 4(a)(iii)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Identify the reagent needed to convert phenol into phenyl propanoate (reaction (iii)).
  84. 4(b)(i)3 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2State the reagents and conditions required for each of Steps I, II, and III.
  85. 4(b)(ii)3 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2Outline the electrophilic substitution mechanism for the nitration of benzene in Step I, using curved arrows to show electron movements.
  86. 4(b)(iii)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2State the name of the reaction mechanism outlined in (b)(ii).
  87. 4(b)(iv)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Explain why the bromo substituent enters the 3-position (meta-position) relative to the nitro group in Step II.
  88. 4(c)(i)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Arrange benzene, nitrobenzene, and methylbenzene in order of increasing ease of reactivity towards electrophilic chlorination.
  89. 4(c)(ii)3 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2Draw the major mono-substituted aromatic chlorinated product formed from the reaction of chlorine with benzene, nitrobenzene, and methylbenzene, respectively.
  90. Q61 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1Which of the following alcohols will NOT be oxidized by acidified potassium dichromate(VI)?
  91. Q71 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1In the reaction between ethene and bromine, which statements about the reaction mechanism may be true? I. A carbocation forms in the rate determining step. II. A dative covalent bond forms between the bromide ion and…
  92. Q81 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1Which of the following statements are correct concerning Compound J? I. It will decolourize aqueous bromine. II. It will decolourize cold, acidified potassium permanganate. III. It will produce a silver mirror with…
  93. Q101 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1Which of the following compounds does NOT give a white precipitate when shaken with cold ethanolic silver nitrate?
  94. Q301 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1For which of the following processes is the apparatus NOT suitable?
  95. 1(a)(i)1 mark· CAPE Chemistry Unit 2 · 2014 · Paper 2State the role of the UV radiation in the reaction.
  96. 1(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2014 · Paper 2Write equations to show the steps occurring in the propagation stage for the formation of dibromomethane from bromomethane.
  97. 1(d)5 marks· CAPE Chemistry Unit 2 · 2014 · Paper 2Complete Table 1 by inserting the appropriate observations for tests (i) to (iv).
  98. 4(a)2 marks· CAPE Chemistry Unit 2 · 2014 · Paper 2Explain the terms 'primary', 'secondary' and 'tertiary' as applied to halogenoalkanes.
  99. 4(c)(ii)5 marks· CAPE Chemistry Unit 2 · 2014 · Paper 2Outline the mechanism for this reaction using curved arrows to indicate the movement of electrons.
  100. 4(d)(i)1 mark· CAPE Chemistry Unit 2 · 2014 · Paper 2Describe the reaction between a solution of D and aqueous silver nitrate.
  101. 4(d)(ii)1 mark· CAPE Chemistry Unit 2 · 2014 · Paper 2Write the equation for this reaction.
  102. Q31 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1The equation for the formation of the anaesthetic, \text{CF}_3\text{CHBrCl}, is \text{CF}_3\text{CH}_2\text{Cl} \xrightarrow{\text{Br}_2} \text{CF}_3\text{CHBrCl}. The type of reaction occurring is
  103. Q41 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1In the reaction between ethene and bromine, which of the following statements about the reaction mechanism may be true? I. A carbocation forms in the rate determining step. II. A dative covalent bond forms between the…
  104. Q51 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1Which of the following compounds will NOT decolourize bromine water but will decolourize potassium manganate(VII) on warming?
  105. Q61 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1Item 6 refers to the following information. A substance reacts with I. \text{NaOH} to form an ionic product II. \text{H}_2 in the presence of a nickel catalyst III. ethanol to produce an organic compound and water.…
  106. Q81 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1Diazonium salts are useful in the synthesis of aromatic compounds. Which of the following compounds can be prepared from a diazonium salt?
  107. Q91 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1A compound, X, reacts with I. 2, 4-dinitrophenylhydrazine (DNPH) to give an orange precipitate II. Tollen's reagent to give a silver mirror III. aqueous alkaline iodine to give yellow crystals. Compound X is MOST likely
  108. Q111 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 12-hydroxy-2-methylpropanoic acid can be formed from propanone in two steps as illustrated below. \text{CH}_3-\text{C}(=\text{O})-\text{CH}_3 \xrightarrow{\text{Step X}}…
  109. Q121 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1Item 12 refers to the following conversion. \text{C}_6\text{H}_5\text{CH}_2\text{CH}_3 + \text{Cl}_2 \longrightarrow \text{C}_6\text{H}_5\text{CH}_2\text{CH}_2\text{Cl} + \text{HCl} Which reaction mechanism occurs…
  110. 1(a)(iii)2 marks· CAPE Chemistry Unit 2 · 2015 · Paper 2Write the condensed structural formulae of B and C.
  111. 1(b)(ii)4 marks· CAPE Chemistry Unit 2 · 2015 · Paper 2Using appropriate notation and equations, explain the steps involved in the mechanism of the chemical reaction of aqueous bromine with propane (in sunlight) OR aqueous bromine with propene (without sunlight).
  112. 1(b)(iii)1 mark· CAPE Chemistry Unit 2 · 2015 · Paper 2Name the mechanism of the reaction selected in (b)(ii).
  113. 1(c)(i)2 marks· CAPE Chemistry Unit 2 · 2015 · Paper 2Describe the observations expected when aqueous bromine is added to liquid heptane (in sunlight).
  114. 1(c)(ii)2 marks· CAPE Chemistry Unit 2 · 2015 · Paper 2Describe the observations expected when acidified potassium permanganate solution is added to liquid heptene (without sunlight).
  115. Q41 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Which of the following compounds is hydrolyzed by water?
  116. Q61 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1An alcohol is treated with acidified \text{K}_2\text{Cr}_2\text{O}_7 and the resulting mixture gives a positive tri-iodoform test. Which of the following structures BEST represents the alcohol used?
  117. Q71 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Which of the following reagents can be used to convert Compound R to Compound Y?
  118. Q101 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Which of the following compounds does NOT give a white precipitate when shaken with cold ethanolic silver nitrate?
  119. Q181 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1For which of the following processes is the apparatus NOT suitable?
  120. 1(d)5 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2Complete Table 1 by describing simple laboratory tests to distinguish between EACH pair of compounds: CH3CH(OH)CH3 vs CH3CH2CH2OH, and CH3CH(OH)CH3 vs CH3CCH3(OH)CH3.
  121. 4(a)2 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2State the type of reaction labelled I and IV.
  122. 4(b)4 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2List the reagents and conditions required for Reactions II and IV.
  123. 4(c)1 mark· CAPE Chemistry Unit 2 · 2016 · Paper 2Draw the displayed formula for Compound X.
  124. 4(d)4 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2Outline the mechanism for Reaction I using curved arrows to indicate the movement of electrons, being careful to identify the various steps involved.
  125. Q41 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1In the reaction between ethene and bromine, which of the following statements about the reaction mechanism may be true? I. A carbocation forms in the rate determining step. II. A dative covalent bond forms between the…
  126. Q61 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1Which of the following reaction mechanisms occurs between benzene and concentrated \text{HNO}_3/\text{H}_2\text{SO}_4?
  127. Q71 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1Item 7 refers to the following incomplete equation. The product of the reaction above is
  128. Q81 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1Diazonium salts are useful in the synthesis of aromatic compounds. Which of the following compounds can be prepared from a diazonium salt?
  129. Q91 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1Hydrogen cyanide can be added to ethanal but not to ethene because
  130. Q101 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1Item 10 refers to the following table which shows the results of an investigation to analyse an organic liquid, Z. The organic liquid Z is MOST likely
  131. Q111 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 12-hydroxy-2-methylpropanoic acid can be formed from propanone in two steps, X and Y, as illustrated below. Which of the following statements about these steps is/are true? I. Step X involves nucleophilic addition. II.…
  132. Q141 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1When butan-1-ol is dehydrated in a suitable piece of apparatus, the product is
  133. 1(c)(i)1 mark· CAPE Chemistry Unit 2 · 2017 · Paper 2Write the general formula of the homologous series of which Compound A is a member.
  134. 1(e)(i)3 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Describe a simple laboratory test to distinguish between CH3CH2CH2OH and CH3CH(OH)CH3.
  135. 1(e)(ii)2 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Describe a simple laboratory test to distinguish between benzene and cyclohexene.
  136. 4(a)6 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Define the terms 'primary', 'secondary', and 'tertiary' as applied to alcohols, providing relevant examples using structural formulae for each.
  137. 4(b)(i)2 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2State the type of reaction producing Compound D and write its structural formula.
  138. 4(b)(ii)2 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Explain the reactions which led to the production of Compounds E and F.
  139. 4(c)(i)2 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Deduce the structural formulae of Compounds E and F.
  140. 4(c)(ii)2 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Deduce the structural formulae of Compounds A and B.
  141. 1(a)(i)2 marks· Chemistry · Unit 2 Q1 1(a)(i)State the reagents and conditions for reaction I (from A to B).
  142. 1(a)(ii)1 mark· Chemistry · Unit 2 Q1 1(a)(ii)State the type of reaction which takes place when the compound reacts with sodium hydroxide.
  143. 1(a)(ii)2 marks· Chemistry · Unit 2 Q1 1(a)(ii)State the reagents and conditions for reaction II (from A to C).
  144. 1(a)(iii)3 marks· Chemistry · Unit 2 Q1 1(a)(iii)Outline a mechanism for the reaction, using curved arrows to show the movement of electrons. Show clearly the structure of any intermediates formed as well as the final product.
  145. 1(b)(i)3 marks· Chemistry · Unit 2 Q1 1(b)(i)State the reagents and condition(s) used to convert benzene into nitrobenzene.
  146. 1(b)(i)5 marks· Chemistry · Unit 2 Q1 1(b)(i)Complete Table 1 by inserting the appropriate observations and inferences in the spaces provided.
  147. 1(b)(ii)5 marks· Chemistry · Unit 2 Q1 1(b)(ii)Outline the mechanism for the reaction described in (b) (i).
  148. 1(b)(ii)2 marks· Chemistry · Unit 2 Q1 1(b)(ii)Based on the observations and inferences, (i) to (iv) in Table 1, predict the functional groups for Product R and Product S.
  149. 1(b)(iii)4 marks· Chemistry · Unit 2 Q1 1(b)(iii)Outline the reaction mechanism for the reaction of P with liquid bromine, using appropriate notations and equations.
  150. 1(b)(iii)1 mark· Chemistry · Unit 2 Q1 1(b)(iii)Draw the DISPLAYED structure of either Product R or Product S which is formed from the oxidation of the hydrocarbon.
  151. 1(b)(iv)1 mark· Chemistry · Unit 2 Q1 1(b)(iv)Identify the type of reaction mechanism outlined in (b)(iii) on page 5.
  152. 1(b)(iv)2 marks· Chemistry · Unit 2 Q1 1(b)(iv)Name and draw the displayed structure of the hydrocarbon C5H10 that was oxidized.
  153. 1(c)(i)5 marks· Chemistry · Unit 2 Q1 1(c)(i)Give the structural formula of Compound A, Compound B and Reagent X.
  154. 1(c)(i)3 marks· Chemistry · Unit 2 Q1 1(c)(i)Write the reagents used for the reactions I, II and III.
  155. 1(c)(ii)2 marks· Chemistry · Unit 2 Q1 1(c)(ii)State the class of compounds to which E belongs, giving the commercial significance of such compounds.
  156. 1(c)(ii)3 marks· Chemistry · Unit 2 Q1 1(c)(ii)List the names of the steps involved in going from A to B in Figure 1.
  157. 1(c)(iii)2 marks· Chemistry · Unit 2 Q1 1(c)(iii)Using curved arrows, give the mechanism for the first step listed in (c) (ii) on page 6.
  158. 1(c)(iii)3 marks· Chemistry · Unit 2 Q1 1(c)(iii)Identify the reagent(s) used and describe the colour changes expected in order to distinguish the polymer from the monomer.
  159. 1(c)(iv)2 marks· Chemistry · Unit 2 Q1 1(c)(iv)State the colour change observed when Compound C in (c) (i) reacts with Br₂.
  160. 1(c)(iv)1 mark· Chemistry · Unit 2 Q1 1(c)(iv)Give the structural formula of a product that can be formed alternatively to Compound B in (c) (i).
  161. 1(c)(iv)4 marks· Chemistry · Unit 2 Q1 1(c)(iv)Outline the mechanism for the reaction between Compound Q and HBr, using curved arrows to show the movement of electrons.
  162. 1(c)(v)1 mark· Chemistry · Unit 2 Q1 1(c)(v)State the type of reaction mechanism outlined in (c)(iv).
  163. 1(c)(vi)2 marks· Chemistry · Unit 2 Q1 1(c)(vi)If the reaction of going from A to B was performed in a closed vessel, what would be the expected colour change?
  164. 1(d)(i)3 marks· Chemistry · Unit 2 Q1 1(d)(i)Name the functional groups highlighted in the compounds labelled A, B and C in the scheme above.
  165. 1(d)(i)2 marks· Chemistry · Unit 2 Q1 1(d)(i)Describe the observations expected for EACH of the following reactions: Aqueous bromine is added to liquid pentane (in sunlight).
  166. 1(d)(ii)2 marks· Chemistry · Unit 2 Q1 1(d)(ii)Identify the reagents I and II in the scheme above.
  167. 1(d)(ii)1 mark· Chemistry · Unit 2 Q1 1(d)(ii)Describe the observations expected for EACH of the following reactions: Aqueous bromine is added to liquid pentane (without sunlight).
  168. 1(d)(iii)2 marks· Chemistry · Unit 2 Q1 1(d)(iii)Identify the colour change observed when Compound A is converted to Compound B.
  169. 1(d)(iii)2 marks· Chemistry · Unit 2 Q1 1(d)(iii)Describe the observations expected for EACH of the following reactions: Cold acidified potassium permanganate solution is added to liquid pentane.
  170. 1(d)(iv)1 mark· Chemistry · Unit 2 Q1 1(d)(iv)Based on your response in (d) (ii), what colour is observed for the conversion of Compound B to Compound C?
  171. 1(d)(v)2 marks· Chemistry · Unit 2 Q1 1(d)(v)Draw the structures of Compound D and Compound E in the space provided below.
  172. 1(d)(vi)1 mark· Chemistry · Unit 2 Q1 1(d)(vi)Name the reaction used to form Compound E.
  173. 1(d)(vii)3 marks· Chemistry · Unit 2 Q1 1(d)(vii)Give the reaction mechanism for EACH of the steps in going from Compound A to Compound E, using curved arrows to show the movement of electrons.
  174. 1(e)(ii)2 marks· Chemistry · Unit 2 Q1 1(e)(ii)State TWO differences between acid hydrolysis and alkaline hydrolysis of ethyl ethanoate.
  175. 1(e)(iii)4 marks· Chemistry · Unit 2 Q1 1(e)(iii)Write balanced chemical equations for EACH of the following. Acid hydrolysis of ethyl ethanoate. Alkaline hydrolysis of ethyl ethanoate.
  176. 1(e)(iv)2 marks· Chemistry · Unit 2 Q1 1(e)(iv)Outline how biodiesel (for diesel engines) is made by the process of transesterification.
  177. 3(b)(i)2 marks· Chemistry · Unit 2 Q3 3(b)(i)Define the term 'catalytic cracking'.
  178. 3(b)(i)1 mark· Chemistry · Unit 2 Q3 3(b)(i)What is the functional group of ethanol, CH₃CH₂OH?
  179. 3(b)(ii)2 marks· Chemistry · Unit 2 Q3 3(b)(ii)Write a balanced equation to show the products of the cracking of decane, C₁₀H₂₂.
  180. 3(b)(ii)6 marks· Chemistry · Unit 2 Q3 3(b)(ii)Table 2 summarizes the conditions and products of two reactions of ethanol. Complete Table 2 by inserting the reaction conditions and drawing the fully displayed structure of the products which would be formed. Take…
  181. 5(a)4 marks· Chemistry · Unit 2 Q5 5(a)Identify the types of reactions numbered 1, 2, 3 and 4 in Figure 3 above.
  182. 5(b)(i)2 marks· Chemistry · Unit 2 Q5 5(b)(i)Identify suitable reagents and reaction conditions which could be used for EACH of the following conversions. Compound A to Compound B via Reaction 1.
  183. 5(b)(ii)2 marks· Chemistry · Unit 2 Q5 5(b)(ii)Identify suitable reagents and reaction conditions which could be used for EACH of the following conversions. Compound A to Compound C via Reaction 2.
  184. 5(c)(ii)2 marks· Chemistry · Unit 2 Q5 5(c)(ii)Hence, write a balanced chemical equation for Reaction 3.
  185. 5(d)4 marks· Chemistry · Unit 2 Q5 5(d)Describe a chemical test that can be used to distinguish Compound A from Compound B.

Related topics in The Chemistry of Carbon Compounds