11.8. Polymers
A subsection of Chemistry, 5070, through 11. Organic chemistry
Listing 10 of 119 questions
Proteins and PET are polymers made by a reaction called condensation polymerisation. The diagram in shows the structure of a section of a protein. O C H N O C H N O C H N O C H N Draw the general structure of the amino acid monomers used to make proteins. Proteins are polyamides. Name one other polyamide. PET is a polymer used to make plastic bottles. The diagram in shows the structure of PET. O C O O O O O C O C O C Name the linkage present in PET. Proteins and PET are both made by condensation polymerisation. Describe the differences between condensation polymerisation and addition polymerisation. Describe two environmental challenges caused by the disposal of plastics such as PET.
5070_s23_qp_22
THEORY
2023
Paper 2, Variant 2
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Petroleum (crude oil) is a mixture of hydrocarbons. Petroleum (crude oil) is separated into fractions such as liquefied petroleum gas, petrol and naphtha. Name the process used to separate petroleum (crude oil) into fractions. Name one other fraction separated from petroleum (crude oil). Give a large-scale use for this fraction. fraction use Petroleum (crude oil) does not contain enough of the fractions that contain smaller hydrocarbon molecules such as petrol . Petroleum contains a high proportion of larger hydrocarbon molecules such as naphtha. Describe how the demand for smaller hydrocarbon molecules is satisfied. The structure of chloroethene is shown. C C H H H Cl Chloroethene is the monomer used to make poly. Polyis non-biodegradable. Explain the meaning of the term non-biodegradable. Describe one environmental problem caused by the disposal of non-biodegradable plastics. Draw the partial structure of poly. Show at least two repeat units. A factory uses 100 tonnes of chloroethene to make poly. Deduce the mass of polymade. Assume the percentage yield is 100%. Explain your answer. Chloroethene reacts with hydrogen in the presence of a catalyst. Suggest the structure of the product of this reaction.
5070_s21_qp_21
THEORY
2021
Paper 2, Variant 1
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Questions Discovered
119