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WorksheetsPolimer chemistry quizz-3
Total questions: 40
Worksheet time: 22mins
Which of the following reaction is NOT accompanied by elimination of a byproduct molecule?
addition polymerization
condensation polymerization
both of the mentioned
none of the mentioned
Which polymers occur naturally?
Starch and Nylon
Starch and Cellulose
Proteins and Nylon
Proteins and PVC
Once formed, it can be heated and reformed over and over again
thermoset
thermoplastic
elastomer
kevlar
Urea formaldehyde is which sort of polymer?
Thermo setting
Thermo plastic
Elastomer
Composite
Polymers not made by condensation polymerisation
Nylon
Kevlar
Polyester
PVC
Amino acids react to produce proteins by:
Addition polymerisation
Condensation polymerisation
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
What is the process to make long polymer (plastic) chains?
Fractional Distillation
Curing
Fracking
Polymerization
What does PVC stand for?
Poly Vinyl Chemical
Poly Vinyl Carbon
Poly Vinyl Chlorine
Poly Vinyl Carbonate
Name the monomer that forms this polymer
ethane
ethanol
ethene
methene
Name the polymer formed from this monomer
chloroethene
chloroethane
dichloroethene
dichloroethane
Polymer made by repeating units of Ethene
Polyethylene
Polythene
PVC
polypropylene
In condensation polymerisation the byproduct formed is
Oxygen
Carbondioxide
Water
Hydrogen
Which of the following is true about plastic?
It's cheap
It's versatile (many uses)
It's disposable
All of the above
Name the plastic used for making water pipes
Polythene
PVC
Acrylic
Bakelite
Polythene which is used to make polythene bags is an example of a ________.
Thermoplastics
thermosetting plastics
Thermoplastic material
soften due to the temperature increase, they become ductile and can be easily shaped, and after cooling they harden again and remain in the given shape.
lose liquid consistency under the influence of heat, chemical agents such as UV radiation.
crosslink under the influence of specified chemical compounds (hardeners) added to the starting materials at room temperature or slightly elevated temperature.
The most commonly used polymers are:
polyethylene (PE) and polypropylene (PP).
polyethylene (PE) and polyisobutene (PIB).
polypropylene (PP) and polyetheretherketone (PB).
The chemical formula presents:
polypropylene.
poly-1-butene.
polyethylene.
The disadvantages of PVC are:
problems that it creates in processing and those related to its production, processing, utilization of harmful emissions of substances.
rare elements existing in structure.
radioactivity.
The disadvantages of PVC are:
problems that it creates in processing and those related to its production, processing, utilization of harmful emissions of substances.
rare elements existing in structure.
radioactivity.
What are the two main categories of plastics?
Thermoplastic and Heat-setting Plastic
Heat-melting Plastic and Thermosetting Plastic
Thermoplastic and Thermosetting Plastic
Hot-melt plastic and Thermosetting Plastic
Which category of plastic melts when you heat it?
Hot-melt Plastic
Thermoplastic
Thermosetting Plastic
Heat-melt Plastic
An ice cube in a hot frying pan best describes which type of plastic?
Thermoplastic
Thermosetting Plastic
Heat-melt Plastic
Hot-melt Plastic
Which category of plastic does not melt when you heat it?
Thermoplastic
Thermosetting Plastic
Heat-setting Plastic
Hot-melt Plastic
A pancake booking on a stove best describes which type of plastic?
Heat-setting Plastic
Hot-melt Plastic
Thermoplastic
Thermosetting Plastic
The most common plastic process which injects melted plastic into a metal mold is called what?
Extrusion
Blown Film
Injection Molding
Blow Molding
Which plastic process continuously compresses melted plastic through an opening (called a die) to create a long plastic piece that can then be cut to length?
Extrusion
Injection Molding
Blow Molding
Blown Film
What is the definition of a composite?
Composites are when you weld two or more metals together to form a new type of metal.
Composites are a combination of two or more materials that are bonded together to improve their mechanical or physical properties.
Composites are when you take 2 or more metals and fuse them through melting.
Composites are when you take 2 or more matrix and mix them to create a new material.
Composites always have at least a ______ and a _______
structure and tensile strength
matrix and structure
tensile strength and reinforcement
matrix and reinforcement
what is reinforcement
fibers or particles that give the composites strength,stiffness and density
a composite with different sets of properties than its constituent materials
decrease in cracking by distributing stress evenly
fillers added to save money or modify properties
what is a matrix
fibers that give the composite strength
material that retains its own structure
working together of reinforcements and heat
continuous portion of the composites
True or False - Particle re-enforcing in composites is a less effective means of strengthening than fibre reinforcement
True
False
What are cermets a composite of?
Carbon fiber and epoxy resin
Carbon fiber and polyester
Ceramic and metals
Cement, sand and aggregate
What is the matrix used to join carbon fibers?
PVA
Epoxy resin
Cyanoacrylate
Urea formaldehyde
