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2 marksStructure and Formulae

CAPE Chemistry Unit 2 · May/June 2025 · Paper 2 · Question 1(a)(i)

Compound A and Compound B are two possible isomers of C7H16, with their displayed structures shown in Figure 1.

Name EACH of the following compounds in Figure 1. Compound A, Compound B.

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Other parts of this question

  1. 1(a)(ii)Define the term 'structural isomerism'.[2 marks]
  2. 1(a)(iii)State the type of structural isomerism present in Compound A.[1 mark]
  3. 1(a)(iv)Describe TWO types of structural isomerism other than the one given in (a)(iii). Draw examples of displayed structures of EACH type.[4 marks]
  4. 1(b)(i)Complete Table 1 by inserting the appropriate observations and inferences in the spaces provided.[5 marks]
  5. 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.[2 marks]
  6. 1(b)(iii)Draw the DISPLAYED structure of either Product R or Product S which is formed from the oxidation of the hydrocarbon.[1 mark]
  7. 1(b)(iv)Name and draw the displayed structure of the hydrocarbon C5H10 that was oxidized.[2 marks]
  8. 1(c)(i)Deduce the monomer used to form the polymer in Figure 2.[1 mark]
  9. 1(c)(ii)Using the diagram in Figure 2 and your response from (c)(i), explain how addition polymers are formed.[2 marks]
  10. 1(c)(iii)Identify the reagent(s) used and describe the colour changes expected in order to distinguish the polymer from the monomer.[3 marks]
  11. 1(c)(iv)State TWO characteristics of condensation polymers.[2 marks]
  12. 1(c)(v)Condensation polymers may be classified based on the type of linkage present. List THREE examples of condensation polymers.[3 marks]

More practice: the rest of this paper · more Structure and Formulae questions · all CAPE Chemistry Unit 2 past papers