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4 marksPolymers

CSEC Chemistry · January 2002 · Paper 2 · Question 5(b)

Suggest why it is recommended that in hot weather, you wear clothing made from naturally occurring fibres rather than synthetic fibres.

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Other parts of this question

  1. 5(a)(i)a)Name ONE example of a fibre used in fabric manufacture sourced from a plant.[1 mark]
  2. 5(a)(i)b)Name ONE example of a fibre used in fabric manufacture sourced from an animal.[1 mark]
  3. 5(a)(i)c)Name ONE example of a synthetic fibre used in the manufacture of fabrics.[1 mark]
  4. 5(a)(ii)a)Give the type of monomer unit present in each of the three fibres named in (a)(i).[3 marks]
  5. 5(a)(ii)b)Illustrate, using suitable structures, how THREE monomer units can be linked together to form part of the macromolecules present in the fibres.[6 marks]
  6. 5(c)(i)Which type of fabric (natural or synthetic) will be susceptible to destruction by micro-organisms?[1 mark]
  7. 5(c)(ii)Give TWO reasons for your answer to (c)(i), considering bonding and affinity for water.[3 marks]
  8. 5(a) [P2]X is a mixture of two compounds. Name them.[2 marks]
  9. 5(b) [P2]Write an equation to show how the compounds in X react to form ammonia.[2 marks]
  10. 5(c)(i) [P2]Give the name of a compound that could be Y.[1 mark]
  11. 5(c)(ii) [P2]Why is it possible to collect ammonia using the method shown?[1 mark]
  12. 5(d) [P2]State the conditions necessary for the production of nitric acid from ammonia.[2 marks]
  13. 5(e) [P2]What would you expect to observe if a sample of ammonia gas collected were bubbled into aqueous copper(II) sulphate until no further change took place?[2 marks]
  14. 5(f) [P2]Describe THREE ways in which the manufacture of ammonia in industry differs from the preparation shown in Figure 4.[5 marks]

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