11.8. Polymers
A subsection of Chemistry, 0620, through 11. Organic chemistry
Listing 10 of 208 questions
Ethene is an alkene. Draw the structure of ethene to show all of the atoms and all of the bonds.  Ethene reacts with aqueousbromine. State the colour change observed when ethene reacts with aqueousbromine. from to Ethene reacts with steam. Name and give the formula of the product of this reaction. name formula  Identify the type of chemical reaction that occurs when ethene reacts with steam. Draw a circle around the correct answer. addition fermentation polymerisation neutralisation Alkenes are produced by cracking hydrocarbons. Complete the chemical equation for the cracking of the hydrocarbon, C16H34, to produce an alkene and one other product. C16H34 → C6H12 +  Polyis produced by combining many ethene molecules. Name the general term used to describe the small molecules which combine to form a polymer. Nylon is a polymer. State one use for nylon. Describe one pollution problem caused by non-biodegradable plastics. 
0620_w20_qp_31
THEORY
2020
Paper 3, Variant 1
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Natural polyamides are polymers made from amino acid monomers. State the type of polymerisation reaction that occurs when natural polyamides form. State the term given to natural polyamides. An amino acid is represented as shown in . H2N COOH Complete to show the general structure of an amino acid. Show all of the atoms and all of the bonds in the functional groups. C H Three different amino acids are represented as shown in . H2N COOH amino acid A H2N COOH amino acid B H2N COOH amino acid C Complete the diagram in to show the part of the structure of the natural polyamide that forms when the three amino acids, A, B and C, combine. Show all of the atoms and all of the bonds in the linkages. A mixture of the three amino acids, A, B and C, can be separated and the amino acids identified using paper chromatography. Complete the equation for Rf. Rf = A sample of the mixture of the three amino acids, A, B and C, is placed onto the baseline and a chromatogram is allowed to develop as shown in . The finished chromatogram is shown in . solvent baseline mixture placed here The amino acids, A, B and C, are colourless. Water is used as the solvent. Explain why the baseline is drawn in pencil. State the type of substance used to make the colourless amino acids visible on the chromatogram in . Explain why in only two spots are seen from the mixture of three amino acids. Suggest how the experiment can be changed to separate all three amino acids.
0620_w24_qp_41
THEORY
2024
Paper 4, Variant 1
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Polyamides and polyesters are polymers. Polyamides can occur naturally or can be manufactured. Part of the structure of a polyamide is shown in . C O C O C C O O N H N H N H N H C O On , draw a circle around one amide linkage. Complete to show the structures of the two monomers needed to make the polymer in . Show all of the atoms and all of the bonds in the functional groups. Name the other product formed in this polymerisation. State the term given to natural polyamides. Name the type of monomers which are used to make natural polyamides. One of the monomers which forms part of a natural polyamide has three carbon atoms. Complete to show the displayed formula of this monomer. C H PET is a polyester. Name the two types of monomer molecules needed to make polyesters. and Draw part of the structure of PET which shows two repeat units. Show all of the atoms and all of the bonds in the linkages.
0620_w24_qp_42
THEORY
2024
Paper 4, Variant 2
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Questions Discovered
208