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WorksheetsSynthetic Fibers and Plastics_E_2
Total questions: 48
Worksheet time: 26mins
Why is nylon used for making parachutes and ropes for rock climbing?
Because nylon fibre is strong and can hold heavy weight
Low-density fibers
Moisture resistance.
Not affected by welding.
Synthetic fibres and plastics, like natural fibres, are made of very large units called (a)
The small unit of polymer is called....
Nylon
Terylene
Monomer
Naphthalene
what are plastics made of?
petachemicals
petrochemicals
patrochemicals
petrocemicals
Synthetic fibres are made from raw materials called (a)
Why should we use a cotton carry bag or jute bag while going for shopping?
Because they are biodegradable
Because they are non-biodegradable
Why do you think people use plastic for their products ?
Because plastic is easily mouldable
Because its very cheap and it's easy to make
Because it's expensive
Because it's rare and it's good for the enviorment
(a)
Teflon is used for nonstick coating on cookwares
because it is a special plastic on which oil and water do not stick.
because it has good resistance to heat and low temperature.
because it has high coefficient of friction
because it has bad resistance to light, UV and weathering.
Plastic containers are favoured for storing food because of:
their light weight,
lower price
good strength
easy handling
Which one is made of PLASTIC?
Books
Soda Can
Milk Box
Pet Bottle
PET is a very familiar form of (a)
Which plastic is identified for recycling by the following symbol according to the European Commission?
PP (polypropylene)
PET (polyethylene terephthalate)
PS (polystyrene)
PVC (polyvinyl chloride)
What is Polyethylene terephthalate (PET) most commonly used for?
water bottles
films
utensils
wires
(a) is a mixture of polyester and cotton.
Which of the following material is a mixture of polyester and wool?
Jute
Polywool
Polyester
Nylon
Materials that undergo decay are called (a)
Cans are ____________ materials.
biodegradable
non-biodegradable
Plastics bottles are __________ products.
biodegradable
non-biodegradable
Tin, aluminium and other metal are __________ products.
biodegradable
non-biodegradable
Rayon is mixed with cotton to make bed sheets.
True
False
Rayon is mixed with wool to make carpets.
True
False
How much time does it take for a plastic bottle to decompose?
around 450 years
around 50 years
around 200 years
around 5 years
Why is plastic dangerous for animals?
They can be trapped in plastic things.
They can choke with small plastic pieces and die.
They can eat plastic which fills their stomaches and they die of starvation because they don't feel hungry.
Plastic is not so dangerous for animals.
How can we help to reduce plastic pollution?
We should use paper/cloth bags.
We should use less plastic.
We should refill our drinking bottles not buy new ones.
We should avoid plastic or styrofoam containers.
All answers are correct.
Mention the type of polymer.
linear
natural
cross linked
synthetic
PET is a kind of (a) .
Which of the following is true about plastic?
It's cheap
It's versatile (many uses)
It's disposable
All of the above
Which of these materials is used to make rain boots?
Paper
Fabric
Plastic
What is it made of?
Plastic
wood
Fabric
Metal
Most plastics are biodagrade
True
False
Why are plastic containers used to store chemicals in labs?
Plastics do not react with water and air.
Plastics do not corrode easily.
Cotton
Silk
PVC
1. Identify the product based on the given features.
I. It is a man-made product.
II. It has a linear arrangement of monomer units.
III. It is used for making goods like toys, combs, containers, etc.
Lycra
Rayon
Thermosets
Thermoplastics
PET is a very familiar form of
chemical
monomer
polyester
polyphenyl
Modern non-stick cookware and the flat end of an electric iron has a coating of a polymer. Identify the name of the polymer.
PVC
Rayon
Teflon
Polyester
Polyethylene terephthalate (PET) is used to warn food in a _________
Microwave
toaster oven
griddle
oven
Plastics find extensive use in the health-care industry. Some examples of their use are:
the packaging of tablets
threads used for stitching wounds
syringes
doctors’ gloves
medical instruments.
Firefighters’ uniform is coated with a plastic that is fire resistant. Identify the plastic from the given options.
Teflon
Melamine
PET
Polyester
Plastics which resists fire and can tolerate heat better than other plastics
Bakelite
Melamine
Polythene
PVC
Melamine is used for making
kitchenware.
floor tiles.
fire-resistant fabrics.
all of them.
Plastics are _______ conductors of heat and electricity.
poor
good
Electrical wires have plastic covering for
insulation
large walls
thin walls
metal walls
What is an insulator?
Something that keeps objects warm
Something that stores thermal energy
Something that slows the transfer of thermal energy
Something that allows the transfer of thermal energy
What is a thermoplastic?
Complete this statement. P.V.C can be used to make Window Frames, Drainage Pipes and (a) .
The two different categories of plastics are:
Thermoplastics
Thermohard Plastics
Thermoset Plastics
Thermotherm Plastics
Which of the following statements is false?
Thermoplastics are difficult to recycle
Thermoplastics become soft when heated, and hard again when cooled
Thermoplastics are environmentally friendly
Thermoplastics are the most commonly used plastics
Why are thermoplastics marked with different numbers?
The number shows the type of thermoplastic
The number shows the weight of the plastic
The number shows the value of the plastic
The number shows the production date of the plastic
