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SC24H
Pearson GCSE Chemistry
Question | Answer |
---|---|
What is a polymer? | A long-chain molecule made by joining many smaller molecules (monomers) together. |
What is a repeating unit? | The part of a polymer that can be repeated many times to form the polymer chain. |
What bond must a monomer have in order to be able to form an addition polymer? | C=C |
This is the structure of ethene, draw the structure of the repeating unit. | |
This is the repeat unit of poly(tetrafluoroethene). Draw the monomer. | |
What is the name of the polymer made from propene monomers? | Poly(propene) |
What properties make poly(chloroethene) good for making window frames? | It is tough and is a good insulator. |
What are the monomers of a protein? | Amino acids. |
What is condensation polymerisation? | A reaction in which monomers join together to form a polymer and eliminate a small molecule, such as water. |
A condensation polymer is made from a monomer containing two alcohol groups and another monomer containing two of which functional group? | Carboxylic acid |
What small molecule is made whenever a new ester linkage is formed in a polyester? | water |
Give two advantages of recycling plastics. | Conserves supplies of crude oil, Reduces the amount of plastics in landfill which saves space, Reduces the amount of plastic being burned so fewer greenhouse and toxic gases are produced |
What is the monomer in poly(ethene)? | ethene |
What is polymerisation? | The process of using small molecules (monomers) to make long chain molecules (polymers) |
What are the two types of polymerisation? | Addition and condensation |
What monomers are involved in addition polymerisation? | Alkenes |
How do we draw polymers? | In round brackets with an n [poly(ethene) is shown] |
What type of monomers are involved in condensation polymerisation? | Ones with two functional groups (like a diol) |
What are the products of condensation polymerization? | A polymer and a small molecule (usually water) |
What is the polymer made from chloroethene monomer? | poly(chloroethene) |
What is the monomer in poly(tetrafluoroethene) (PTFE)? | tetrafluoroethene |
What is a use of poly(ethene)? | carrier bags |
What is a use of poly(propene)? | drain pipes |
What is a use of poly(chloroethene)? | clothing |
What is a use of PTFE? | Non stick coatings on pans |
What does the repeating unit for the polymer made of propene look like? | (CH3CH-CH)- |
What is formed from different amino acids combined in one chain? | Proteins |
What does DNA stand for? | Deoxyribonucleic acid |
What is DNA? | A large molecule containing genetic information |
What is the structure of DNA? | Two polymer chains made from nucleotides in the form of a double helix |
Name four naturally occurring polymers | DNA, proteins, starch, cellulose |
What monomers are starch and cellulose made of? | Glucose |