WorksheetsStructure 2.4 Review
Total questions: 26
Worksheet time: 20mins
Which of these substances does not have the ability to polymerize?
ethane, CH3CH3
Tetrafluoroethene, CF2CF2
Propene, CH2CHCH3
Propenenitrile, CH2CHCN
Steel generally speaking is made of
iron and carbon
copper and iron
tin and carbon
aluminum and nickel
Brass is an alloy made of
copper and zinc
copper and tin
copper and nickel
copper and aluminum
Which of these is not a function of alloy steels?
Increases strength
Reduces cost
Improves ductility
Improves machinability
What is the remarkable property of some stainless steel alloys?
High electrical conductivity
Resistance to corrosion and staining
Low melting point
Superior hardness and toughness
_______ are repeating units that are the building blocks of larger molecules called _______.
monomers, polymers
polymers, monomers
carbohydrates, proteins
lipids, nucleic acids
A polymer made in the laboratory (or industry) usually made from petrochemicals
nature polymer
natural polymer
protein
synthetic polymer
Which of these is an example of synthetic polymer?
cotton fibers
rubber
wool
polyvinyl chloride (PVC)
Polystyrene is a_______polymer
condensation
addition
Polymers can be stiffened through
cross-linking
alloying
ordering
close packing
Type of polymerization reaction which breaks the double bond of monomers
addition
condensation
oxidation
carboxylation
What feature of alkene molecules allows them to act as monomers?
The double C=C bond
The presence of carbon atoms
The presence of hydrogen atoms
Define polymer
circular molecule made with many repeating units
short molecule made of a few repeating units
long, chain-like molecule made of repeating units
chain-like molecule that contains hydrogen and oxygen
The advantage(s) of plastic is/are
Strong in nature
Light in weight
Poor conductors of Electricity
Corrosion resistant
Important to the structural integrity of plant cells, this is the single most popular polymer in the natural world.
What do scientists call plastics when they break down into tiny pieces?
Microtrash
Microplastics
Microparticles
Macroplastics
Why is plastic used so extensively?
Because it is durable
Because it is strong
Because it is cheap
All of the above
Why recycling can't win with plastic pollution?
*** choose all that apply***
Because recycling is wrong
Because people produce too much plastic to recycle it all.
Because not every plastic can be recycled.
Because not many people recycle rubbish.
Plastics contain ___________________, which are long chains of molecules that manufacturers can mold, cast or force through a die into desired shapes.
pigments
polymers
core walls
chamfers
Plastic is made from petroleum, which is a non-renewable resource.
True
False
Cooking pans have plastic handles because
They are light, durable and strong
They are non- reactive
They are poor conductors of heat and electricity
They do not catch fire
How many monomers are shown here?
1
2
3
4
5
