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Organic Chemistry - An Introduction · CSEC Chemistry

123 past-paper questions on Organic Chemistry - An Introduction, part of Organic Chemistry, from every CSEC Chemistry paper on Quelpr.

Practise Organic Chemistry - An Introduction
  1. 2(c)(ii)1 mark· Chemistry Q2 2(c)(ii)Define the term 'structural isomerism'.
  2. 2(c)(iii)4 marks· Chemistry Q2 2(c)(iii)In the space provided below draw fully displayed structures of TWO isomers of a hydrocarbon with four carbon atoms. Name the TWO isomers.
  3. 3(a)2 marks· Chemistry Q3 3(a)State the homologous series to which EACH compound belongs.
  4. 3(a)3 marks· Chemistry Q3 3(a)List THREE characteristics of a homologous series.
  5. 3(a)2 marks· Chemistry Q3 3(a)Define the term 'structural isomerism'.
  6. 3(a)4 marks· Chemistry Q3 3(a)Draw the FULLY displayed structures and state the names of BOTH compounds. Compound A Name: Compound B Name:
  7. 3(a)6 marks· Chemistry Q3 3(a)Draw FULLY DISPLAYED chemical structures for EACH of the following organic compounds identified in the reaction scheme above: C, E, F.
  8. 3(a)2 marks· Chemistry Q3 3(a)State the name of the homologous series to which EACH of Compounds B and C belongs.
  9. 3(a)(i)1 mark· Chemistry Q3 3(a)(i)State the name and the general formula of the homologous series to which Compound P belongs.
  10. 3(a)(i)1 mark· Chemistry Q3 3(a)(i)Define 'structural isomerism'.
  11. 3(a)(i)2 marks· Chemistry Q3 3(a)(i)Organic molecules can exist as different structural isomers. Define the term 'structural isomers'. Definition:
  12. 3(a)(i)1 mark· Chemistry Q3 3(a)(i)State the name of Compound D.
  13. 3(a)(i)2 marks· Chemistry Q3 3(a)(i)Draw the FULLY DISPLAYED structure of ethene.
  14. 3(a)(i)1 mark· Chemistry Q3 3(a)(i)State whether Compound A is an alkane or alkene.
  15. 3(a)(i)2 marks· Chemistry Q3 3(a)(i)Name the homologous series to which Compounds A and B belong.
  16. 3(a)(i)2 marks· Chemistry Q3 3(a)(i)Write the names of the homologous series to which A and B belong. Homologous series for A: Homologous series for B:
  17. 3(a)(i)1 mark· Chemistry Q3 3(a)(i)Which compounds belong to the same homologous series?
  18. 3(a)(i)1 mark· Chemistry Q3 3(a)(i)Define 'structural isomerism'.
  19. 3(a)(i)4 marks· Chemistry Q3 3(a)(i)Draw the FULLY DISPLAYED structures and state the names of BOTH compounds.
  20. 3(a)(ii)1 mark· Chemistry Q3 3(a)(ii)Identify the homologous series to which Compound D belongs.
  21. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)State the homologous series to which the compounds you named in (a)(i) belong, and give a reason for placing them in the same homologous series.
  22. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)Write the general formulae for EACH homologous series named in (i) above. General formula for homologous series of A: General formula for homologous series of B:
  23. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)Draw fully displayed structures of but-1-ene and but-2-ene.
  24. 3(a)(ii)4 marks· Chemistry Q3 3(a)(ii)Molecules with the formula C₄H₁₀ can exist as structural isomers. In the space provided below, draw FULLY DISPLAYED structures of TWO isomers with formula C₄H₁₀.
  25. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)Draw fully displayed structures of but-1-ene and but-2-ene.
  26. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)Draw the FULLY DISPLAYED structure of the 1,2-dichloroethane.
  27. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)The empirical formula for A is CH₂O. Deduce whether or not A and B belong to the same homologous series. Explain your answer.
  28. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)Draw the FULLY DISPLAYED structure of Compound A.
  29. 3(a)(ii)2 marks· Chemistry Q3 3(a)(ii)State the name of EACH compound.
  30. 3(a)(iii)2 marks· Chemistry Q3 3(a)(iii)Draw and name ONE OTHER structural isomer of C₄H₈.
  31. 3(a)(iii)4 marks· Chemistry Q3 3(a)(iii)Draw fully displayed structures of ANY TWO structural isomers of Compound C. Give the name of EACH isomer you have drawn.
  32. 3(a)(iii)1 mark· Chemistry Q3 3(a)(iii)Define the term 'structural isomerism'.
  33. 3(a)(iii)3 marks· Chemistry Q3 3(a)(iii)Draw and name ONE OTHER structural isomer of C₄H₈.
  34. 3(a)(iv)2 marks· Chemistry Q3 3(a)(iv)Draw the FULLY DISPLAYED structure of ONE isomer of Compound P.
  35. 3(a)(iv)1 mark· Chemistry Q3 3(a)(iv)State ONE physical property of C₄H₈.
  36. 3(b)(i)1 mark· Chemistry Q3 3(b)(i)Draw a structural representation of glucose.
  37. 3(b)(i)1 mark· Chemistry Q3 3(b)(i)State the name of Compound P.
  38. 3(b)(i)2 marks· Chemistry Q3 3(b)(i)Draw the FULLY displayed structural formula for Compound A which has the molecular formula C₂H₄.
  39. 3(b)(i)2 marks· Chemistry Q3 3(b)(i)Define 'structural isomerism'.
  40. 3(b)(i)1 mark· Chemistry Q3 3(b)(i)State the name of Compound E.
  41. 3(b)(i)1 mark· Chemistry Q3 3(b)(i)What is meant by a 'functional group'?
  42. 3(b)(ii)1 mark· Chemistry Q3 3(b)(ii)State the homologous series to which Compound A belongs.
  43. 3(b)(ii)4 marks· Chemistry Q3 3(b)(ii)Draw the FULLY DISPLAYED structure of ONE structural isomer for EACH of Compounds A and B.
  44. 3(b)(ii)1 mark· Chemistry Q3 3(b)(ii)Identify the homologous series to which Compound E belongs.
  45. 3(b)(iii)1 mark· Chemistry Q3 3(b)(iii)Write the molecular formula for the compound which has five carbon atoms of the homologous series stated in (b) (ii).
  46. 3(b)(iii)1 mark· Chemistry Q3 3(b)(iii)Write the general formula for this homologous series.
  47. 3(b)(iv)4 marks· Chemistry Q3 3(b)(iv)Draw the FULLY DISPLAYED structural formulae of Compound P and ONE of its isomers.
  48. 3(c)4 marks· Chemistry Q3 3(c)Draw the FULLY DISPLAYED formulae to show the structure of Compound X and Compound Y.
  49. 3(c)(i)2 marks· Chemistry Q3 3(c)(i)Draw a possible FULLY DISPLAYED structural formula of Compound B.
  50. 3(c)(i)2 marks· Chemistry Q3 3(c)(i)Draw the FULLY displayed structural formula for Compound B which has the molecular formula C₂H₆.
  51. 3(c)(i)3 marks· Chemistry Q3 3(c)(i)Write the names of the homologous series to which EACH of these three compounds belongs. Compound X: Compound Y: Compound Z:
  52. 3(c)(i)2 marks· Chemistry Q3 3(c)(i)Draw the FULLY DISPLAYED structure of ONE BRANCHED isomer of Compound Q.
  53. 3(c)(ii)1 mark· Chemistry Q3 3(c)(ii)State the homologous series to which Compound B belongs.
  54. 3(c)(iii)1 mark· Chemistry Q3 3(c)(iii)Write the molecular formula for the compound which has five carbon atoms of the homologous series stated in (c) (ii).
  55. 3(d)1 mark· Chemistry Q3 3(d)State the name of Compound R.
  56. 3(d)(i)1 mark· Chemistry Q3 3(d)(i)State the homologous series to which Compounds A and B belong.
  57. 3(d)(i)2 marks· Chemistry Q3 3(d)(i)For EACH of the following homologous series write the general formula: Carboxylic acid, Alcohol.
  58. 3(d)(ii)1 mark· Chemistry Q3 3(d)(ii)State the name of Compound A.
  59. 3(d)(ii)2 marks· Chemistry Q3 3(d)(ii)For EACH of the following homologous series write the name of the first member: Carboxylic acid, Alcohol.
  60. 4(a)(i)1 mark· Chemistry Q4 4(a)(i)Draw the fully displayed structural formula for Compound A.
  61. 4(a)(i)7 marks· Chemistry Q4 4(a)(i)Complete Table 3 below by drawing the displayed structure, and writing the name of EACH of the compounds, X, E and D.
  62. 4(b)(i)1 mark· Chemistry Q4 4(b)(i)Based on your answer in 4 (a) on page 9, deduce the homologous series to which X belongs.
  63. 4(b)(i)2 marks· Chemistry Q4 4(b)(i)Identify the homologous series to which Compounds X and E belong. Compound X: Compound E:
  64. 4(b)(i)1 mark· Chemistry Q4 4(b)(i)Draw the fully displayed structural formula for Compound B.
  65. 4(b)(i)1 mark· Chemistry Q4 4(b)(i)Give the name for structure a.
  66. 4(b)(ii)1 mark· Chemistry Q4 4(b)(ii)Write the name of Compound X.
  67. 4(b)(ii)2 marks· Chemistry Q4 4(b)(ii)State which of these hydrocarbons are isomers.
  68. 4(b)(iii)1 mark· Chemistry Q4 4(b)(iii)Draw the fully displayed structure of X.
  69. 4(b)(iii)2 marks· Chemistry Q4 4(b)(iii)Which TWO hydrocarbons belong to the same homologous series? Give ONE reason for your answer.
  70. 4(b)(iv)1 mark· Chemistry Q4 4(b)(iv)Write the general formula of the isomers identified in (iii) above.
  71. 4(c)(i)1 mark· Chemistry Q4 4(c)(i)To what homologous series does Y belong?
  72. 4(c)(ii)1 mark· Chemistry Q4 4(c)(ii)Write the name of Compound Y.
  73. 4(c)(iii)2 marks· Chemistry Q4 4(c)(iii)Draw the fully displayed structure of Y.
  74. 5(a)(i)2 marks· Chemistry Q5 5(a)(i)From the compounds A to D above, select ONE compound which is saturated and ONE compound which is unsaturated.
  75. 5(a)(i)3 marks· Chemistry Q5 5(a)(i)List THREE general characteristics of a homologous series.
  76. 5(a)(i)1 mark· Chemistry Q5 5(a)(i)Name the homologous series to which Compound D belongs.
  77. 5(a)(ii)2 marks· Chemistry Q5 5(a)(ii)Write the molecular formulae of the second and third members of the alkane homologous series.
  78. 5(a)(ii)2 marks· Chemistry Q5 5(a)(ii)Draw the FULLY DISPLAYED structural formula of Compound D and write its name.
  79. 5(a)(ii)4 marks· Chemistry Q5 5(a)(ii)Name AND give the general formula for the homologous series to which EACH of the two compounds selected in (a) (i) above belongs.
  80. 5(a)(iii)2 marks· Chemistry Q5 5(a)(iii)Derive the general formula of the alkane homologous series.
  81. 5(a)(iii)1 mark· Chemistry Q5 5(a)(iii)Name of Compound D
  82. 5(b)(i)1 mark· Chemistry Q5 5(b)(i)Define the term 'structural isomerism'.
  83. 5(b)(ii)3 marks· Chemistry Q5 5(b)(ii)Draw a FULLY DISPLAYED structural formula of 1-Butene and its two isomers.
  84. 5(c)4 marks· Chemistry Q5 5(c)Identify and draw the structural formulae of the alkene and the acid from the list of molecular formulae given below: C₄H₈, C₄H₁₀, C₄H₈O₂, C₄H₁₀O.
  85. 6(b)(i)3 marks· Chemistry Q6 6(b)(i)Compare the mode of action of direct dyes to that of mordant dyes.
  86. 6(b)(ii)3 marks· Chemistry Q6 6(b)(ii)Suggest why mordant dyes are used when dyeing cotton fabrics.
  87. 6(b)(iii)1 mark· Chemistry Q6 6(b)(iii)Suggest a fabric for which direct dyeing can be used.
  88. Q411 mark · multiple choice· CSEC Chemistry · January 2017 · Paper 1Which of the following correctly identifies the homologous series to which each compound belongs?
  89. Q431 mark · multiple choice· CSEC Chemistry · January 2017 · Paper 1The existence of millions of organic compounds is due primarily to the ability of carbon to form I. multiple bonds II. ring structures III. branched chains
  90. Q571 mark · multiple choice· CSEC Chemistry · January 2017 · Paper 1ALL members of a homologous series have similar
  91. Q441 mark · multiple choice· CSEC Chemistry · January 2018 · Paper 1Which of the following features is NOT true of all homologous series of compounds? The members of the series have
  92. Q451 mark · multiple choice· CSEC Chemistry · January 2018 · Paper 1Compounds I and II are known as the
  93. Q461 mark · multiple choice· CSEC Chemistry · January 2018 · Paper 1The compound 2-bromobutane has a structural formula of
  94. Q231 mark · multiple choice· CSEC Chemistry · January 2019 · Paper 1The bond between the two carbon atoms is
  95. Q491 mark · multiple choice· CSEC Chemistry · January 2019 · Paper 1Hexane is an alkane with six carbon atoms per molecule. Which of the following is the formula for hexane?
  96. Q501 mark · multiple choice· CSEC Chemistry · January 2019 · Paper 1Compounds I and II are known as the
  97. Q571 mark · multiple choice· CSEC Chemistry · January 2019 · Paper 1ALL members of a homologous series have similar
  98. 3(a)(i)2 marks· CSEC Chemistry · January 2021 · Paper 2Define the term 'structural isomerism'.
  99. 3(a)(ii)2 marks· CSEC Chemistry · January 2021 · Paper 2Draw the fully displayed structure of 2-methylbutane.
  100. 3(a)(iii)3 marks· CSEC Chemistry · January 2021 · Paper 2Draw and name ONE other structural isomer of C₅H₁₂.
  101. 5(c)(i)1 mark· CSEC Chemistry · January 2021 · Paper 2Given that R is an ethyl group, state the molecular formula for Compound A.
  102. Q381 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1Which of the following compounds is NOT a member of the alkene series?
  103. Q391 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1Items 39 - 40 refer to the following options. (A) \text{C}_2\text{H}_4 (B) \text{C}_2\text{H}_6 (C) \text{CH}_3(\text{CH}_2)_2\text{COOH} (D) \text{CH}_3(\text{CH}_2)_3\text{OH} Match each item below with ONE…
  104. Q401 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1Items 39 - 40 refer to the following options. (A) \text{C}_2\text{H}_4 (B) \text{C}_2\text{H}_6 (C) \text{CH}_3(\text{CH}_2)_2\text{COOH} (D) \text{CH}_3(\text{CH}_2)_3\text{OH} Match each item below with ONE…
  105. Q411 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1Isomerism is a property shown by compounds possessing
  106. Q441 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1Which of the following structures represents an unsaturated hydrocarbon?
  107. Q531 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1Item 53 refers to the following structures. Which structures represent branched alkanes?
  108. Q491 mark · multiple choice· CSEC Chemistry · May/June 2011 · Paper 1Which of the following pairs of structural formulae are isomers of \text{C}_4\text{H}_{10}? I. \text{H}_3\text{C}-\text{CH}_2-\text{CH}_2-\text{CH}_3 II.…
  109. Q461 mark · multiple choice· CSEC Chemistry · May/June 2013 · Paper 1ALL members of a homologous series have similar
  110. Q471 mark · multiple choice· CSEC Chemistry · May/June 2013 · Paper 1To which homologous series does the following structure belong? \begin{array}{ccc} \text{H} & \text{H} & \text{H} \\ | & | & | \\ \text{H}-\text{C}-\text{C}-\text{C}-\text{OH} \\ | & | & | \\ \text{H} & \text{H} &…
  111. Q491 mark · multiple choice· CSEC Chemistry · May/June 2013 · Paper 1The compound which has the formula \text{CH}_3\text{CH}=\text{CH}\text{CH}_2\text{CH}_2\text{CH}_3 is
  112. Q311 mark · multiple choice· CSEC Chemistry · May/June 2015 · Paper 1ALL members of a homologous series have similar
  113. Q331 mark · multiple choice· CSEC Chemistry · May/June 2015 · Paper 1To which homologous series does the following structure belong? \begin{array}{ccc} \text{H} & \text{H} & \\ | & | & \text{O} \\ \text{H}-\text{C}-\text{C}- & \text{C} \\ | & | & \diagup \\ \text{H} & \text{H} &…
  114. Q501 mark · multiple choice· CSEC Chemistry · May/June 2015 · Paper 1The compound which has the formula \text{CH}_3\ \text{CH}=\text{CH}\ \text{CH}_2\text{CH}_2\ \text{CH}_3 is
  115. Q431 mark · multiple choice· CSEC Chemistry · May/June 2016 · Paper 1Which of the following statements about compounds in a homologous series is correct?
  116. Q481 mark · multiple choice· CSEC Chemistry · May/June 2016 · Paper 1How many isomers of butane \text{C}_4\text{H}_{10} are there?
  117. Q491 mark · multiple choice· CSEC Chemistry · May/June 2016 · Paper 1Which of the following substances is an unsaturated hydrocarbon?
  118. Q501 mark · multiple choice· CSEC Chemistry · May/June 2016 · Paper 1Which of the substances is a saturated hydrocarbon?
  119. Q561 mark · multiple choice· CSEC Chemistry · May/June 2016 · Paper 1Which of the following structures represents a molecule of but-2-ene?
  120. Q571 mark · multiple choice· CSEC Chemistry · May/June 2016 · Paper 1Which of the following features is NOT true of all homologous series of compounds? The members of the series have
  121. Q331 mark · multiple choice· CSEC Chemistry · May/June 2017 · Paper 1To which homologous series does the following structure belong? \begin{array}{cc} \text{H} & \text{H} \\ | & | \\ \text{H}-\text{C}-\text{C}- \\ | & | \\ \text{H} & \text{H} \end{array} \begin{array}{l} \text{C} =…
  122. Q341 mark · multiple choice· CSEC Chemistry · May/June 2017 · Paper 1Which of the following is the name of the compound \text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{OH}?
  123. Q431 mark · multiple choice· CSEC Chemistry · May/June 2017 · Paper 1Compounds in a homologous series

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