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Chemistry - Polymers
The polymer made from styrene is polystyrene.

Chemistry - Polymers

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One of the topics covered in high school science is the chemistry of crude oils and of other fuels. This quiz focuses in particular on plastics - the polymers which are manufactured from crude oil.

Cracking fractions of crude oil produces smaller alkane molecules and alkenes. Which of the following is not an alkene?
The general formula for an alkene is CnH2n where n represents the number of atoms. In other words, any compound made from only carbon and hydrogen is an alkene if the number of hydrogen atoms is exactly double the number of carbon atoms
Why are alkanes so useful as monomers?
Because alkanes contain only double bonds
Because alkanes contain only single bonds
Because alkanes contain at least one oxygen atom
Because alkanes contain at least one double bond between carbon atoms
The double bond between carbon atoms is easier to break than single bonds
How is a double bond represented?
A short line resembling a 'dash' is used to represent a covalent chemical bond. In cases where there is more than one covalent bond between two atoms, the dashes are stacked one on top of each other
How are polymers made from alkenes?
Polymers are one of the main products made by cracking crude oil
Polymers are made by adding lots of smaller molecules together in a long chain
Polymers are made by carrying out ordinary distillation on crude oil instead of fractional distillation
Polymers are made by using enzymes
The process is referred to as addition polymerisation. A polymer is a long chain molecule and its poperties depend on the molecules used to make it and the conditions used during polymerisation
What do scientists call the small molecules that are joined together to make polymers?
This is because the prefix mono- means one on its own. The prefix poly- means many
What monomer is used to make poly(propene)?
The clue is in the name and you are looking for an alkene
Which of the following is a use for polymers?
Waterproof coatings for fabrics
Fillings for teeth
Dressings for wounds
All of the above
There are very few everyday items that can't be made from polymers
Which of the following is not an advantage of polymers?
Polymers are not usually biodegradeable
Polymers are light
Polymers are often flexible
Color can be built into a polymer when it is made
Microbes cannot usually break down polymers so they will remain in the environment. This creates problems with waste disposal
How are scientists trying to make products made with polymers biodegradeable?
They are developing ways of chemically treating plastics as they go into landfill sites
They are developing methods of burning plastics that don't pollute the air
There is nothing that can be done to solve the problem
They are developing plastics that contain cornstarch as well as polymers
Cornstarch is biodegradeable. Adding cornstarch molecules into the polymer chains allows microbes such as bacteria and fungi to chop the polymer chains into smaller particles, thus breaking down the polymer. This is not a perfect solution since you end up with lots of small pieces of polymer molecules in the environment but at least it gets rid of the massive pieces of plastic that litter the world
What is the most environmentally friendly way to dispose of your used plastic items?
Putting them into the bin
Recycling them
Burning them
Burying them
The raw material for plastics is oil. At some point in the future, all of the Earth's oil reserves will have been used up. As well as being good for the environment, recycling plastics is a great way of making oil reserves last longer
Author:  Kev Woodward

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