WorksheetsGrade-8 synthetic fibers and plastic
Total questions: 30
Worksheet time: 15mins
Plastics which resists fire and can tolerate heat better than other plastics
Bakelite
Melamine
Polythene
PVC
The plastics which gets deformed easily on heating and can be bent easily is called (a)
Poly + Cot = ______
Polycotton
Polcot
Polycot
Terrycot
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
Name the plastic used for non - stick coating
(a)
Name the plastic used for making water pipes
Polythene
PVC
Acrylic
Bakelite
We should not wear synthetic clothes while cooking in the kitchen or in a laboratory.
True
False
Which of the following will soak less water?
Nylon
Silk
Wool
Cotton
Necklace : bead :: polymer : ________.
Monomer
Dimer
Tetramer
Trimer
A fibre which is as soft as wool is
rayon
nylon
polyester
acrylic
The first synthetic fibre formed from a natural material wood pulp is
acrylic
rayon
nylon
polyester
Atul was climbing mountain and he wondered about the strength of rope in his hand which was stronger than a steel wire. This rope would have been made up of:
Polyester
Nylon
Rayon
Cotton
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.
Petrochemicals are
mixtures of petrol and chemical fertilizer.
materials obtained from petroleum refining.
mixtures of coal and petrol.
mixtures of wood and chemicals.
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
PET is a very familiar form of
chemical
monomer
polyester
polyphenyl
_________ is the first fully synthetic fibre.
Acrylic
Polyester
Nylon
Rayon
Type of Plastic in which oil and Water do not stick
(a)
Is plastic biodegradable
Yes
No
Thermoplastics
Melamine
Baketile
Floor tiles
PVC
Which type of Plastic is this?
Thermoplastic
Thermosetting plastic
Nylon was prepared from ____________
Coal and Oil
Coal, Water and Air
Coal and Water
Coal and Mixture of whatever and oil
Carpets are made from?
Rayon and Cotton
Cotton and Wool
Rayon and Wool
Wool
Rayon is mixed with (a) to make bedsheets
Rayon is a natural fibres
True
False
Rayon is obtained from?
(a)
A large single unit combined by many small units
Polyester
Polymer
Terrycot
Polywool
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.
