WorksheetsSynthetic Fibres - Grade 8 ANNUAL EXAMS
Total questions: 40
Worksheet time: 21mins
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
What of the following is used for making stockings and parachutes?
Bakelite
Wool
Nylon
Cotton
One of the advantages of nylon over rayon is that nylon:
Is wrinkle free.
Has low elasticity.
Is a natural fibre.
Is a good conductor of electricity.
Which of the following material is a mixture of two fibres?
Jute
Polywool
Polyester
Nylon
Fibres of _______ resemble that of silk and hence, it is popularly known as ‘artificial silk’.
acrylic
polyester
rayon
nylon
Firefighters’ uniform is coated with a plastic that is fire resistant. Identify the plastic from the given options.
Teflon
Melamine
PET
Polyester
Identify the type of plastic that can best be used to make electrical switches.
PVC
Polythene
PET
Bakelite
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
Terylene is a popular form of
Polyester
Monomer
Plastic
Nylon
Select the correct option from the given statements.
Polymers cannot form fibres
Polymers can be both natural and synthetic
Polymer is a natural substance
Polymer is a synthetic substance
Which of the following groups contain only synthetic fibres?
Nylon, Terylene, Wool
Cotton, Polycot, Rayon
PVC, Polythene, Bakelite
Acrylic, Silk, Wool
Petrochemicals are
mixtures of petrol and chemical fertilizer.
materials obtained from petroleum refining.
mixtures of coal and petrol.
mixtures of wood and chemicals.
Assertion: Acrylic fibres are used in making socks and shawls.
Reason: Acrylic fibres are a replacement or woolen fibres.
Both assertion and reason are true and the reason is the correct explanation of assertion.
Both assertion and reason are true but the reason is not correct for the assertion.
The assertion is true but the reason is false.
The assertion is false but the reason is true.
Pickles are stored in plastic bottles mainly because they are:
non-biodegradable
good insulators
durable
non-reactive
Polyethylene terephthalate belongs to which class of synthetic polymer?
Plastic
Polyolefin
Nylon
Polyester
Acrylic fiber is
Name the plastic used for making water pipes
Polythene
PVC
Acrylic
Bakelite
Many small unit combine together to form a large unit called (a)
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
Poly + Cot = ______
Polycotton
Polcot
Polycot
Terrycot
Silk fibre is obtained from silk worm whereas artificial silk is obtained by the chemical treatment of _______________.
paper pulp
Rayon
Coal, air and water
wood pulp
Plastics which resists fire and can tolerate heat better than other plastics
Bakelite
Melamine
Polythene
PVC
Read the given statements and mark the appropriate answer.
Statement 1: Fabric made from this polyester does not get wrinkled easily.
Statement 2: Polyester is a natural fibre.
Both statements 1 and 2 are true and
statement 2 is the correct explanation
of statement 1.
Both statements 1 and 2 are true
but statement 2 is not the correct
explanation of statement 1.
Both statements 1 and 2 are false.
Statement 1 is true and statement 2
is false.
Which of the following is not a blended fibre?
Terrycot
Terrylene
Polycotton
Terywool
The first synthetic fibre formed from a natural material wood pulp is
acrylic
rayon
nylon
polyester
Necklace : bead :: polymer : ________.
Monomer
Dimer
Tetramer
Trimer
Which one of the following can be semi-synthetic fibre?
Nylong
Rayon
Acrylic
PET
Which of the following will soak less water?
Nylon
Silk
Wool
Cotton
We should not wear synthetic clothes while cooking in the kitchen or in a laboratory.
True
False
Terylene is mixed with ... ... to make terricot.
wool
cotton
silk
jute
.... ... fiber is as strong as steel
Nylon
Rayon
Acrylic
Terylene
....... is used in making parachutes.
rayon
nylon
plastic
acrylic
...... is the only synthetic fiber obtained from plants cellulose and used to make diapers.
nylon
rayon
acrylic
all the above
Bakelite and Melamine are examples of
Silk
Thermosetting Plastics
The 4R principle is
Reduce, Reuse, Recycle, Recover
Remember, Reduce, Recycle, Rejoice
Repeat, Recycle, Rejoice, Reduce
None of these
The plastics which do not remould again on heating are called:
Thermosetting plastics
Thermoplastics
Both of these
None of these
What term means "does not break down in the environment"
biodegradeable
non-biodegradeable
corrosive
biodegenerative
How many times can thermosetting plastics be heated and shaped?
Once.
Twice.
Three times.
Many times.
