Font size
WorksheetsSynthetic fibres and plastics
Total questions: 18
Worksheet time: 9mins
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.
1. Identify the product based on the given features.
I. It is a man-made product.
II. It has a cross link arrangement of monomer units.
III. It is used for making goods like wire coverings, switch boards, laptops, etc.
Lycra
Rayon
Thermosetting plastics
Thermoplastics
Mention the type of polymer.
linear
natural
cross linked
synthetic
Which type of plastic is Bakelite
Thermosetting plastic
Thermoplastic
None of the above
What plastic is used for handles of frying pans
Bakelite
Polyvinyl chloride
Melanie
Polythene
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
In plastic the arrangement of individual units may be____
Linear or cross linked
Linear or straight linked
Plastics are
Non biodegradable
Biodegradable
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
Which of the following statements is/are correct?(I) Most synthetic fibres are obtained from coal, petroleum and natural gas.(II) Acrylic fibres closely resemble wool.(Ill) Most synthetic fibres have very high moisture absorbing capacity.(IV) Polyester is prepared from cellulose.
I and II only
II and III only
IV only
All of these
Pre-weighed pieces of cloth of nylon, cotton, silk and wool of equal measurements are taken and soaked in a beaker filled with water. After a few minutes, the cloth pieces were taken out of the beaker and weighed again. Which of the following options places them in the correct order of their final weights?
Wool > Silk > Nylon > Cotton
Cotton > Silk > Nylon > Wool
Silk > Wool > Cotton > Nylon
Wool > Cotton > Silk > Nylon
Why is it not advisable to wear clothes made up of synthetic fibres in hot and humid weather?
Synthetic fibres catch fire very easily.
Synthetic fibres do not absorb sweat.
Synthetic fibres stick to the body.
Both (b) and (c).
A brief information about three different plastics is given below :
X : Thermoplastic which can be rolled into sheets
V : Thermoplastic which is used as a covering for electric wires.
Z : Thermosetting which is used for making plugs and switches.
Identify X, Y and Z,
X, Y , Z Melamine , Teflon , Bakelite
X, Y, Z Bakelite ,Malamine ,Polythene
X ,Y ,Z Polythene ,Polyvinyl chloride ,Bakelite
X ,Y ,Z Polyvinyl chloride, Polythene ,Melamine
Which of the following statements about plastics are true?(i) All plastics do not have same arrangement of monomer units.(ii) Melamine resists fire and can tolerate heat better than other plastics.(iii) Plastics with cross-linked monomers are also known.(iv) Plastics have limited applications.
(i) and (iii) only
(iii) and (iv) only
(i), (ii) and (iii) only
(i), (iii) and (iv) only
Which of the following materials is the best for making garments and jackets that can be used in wet or damp environment?
Polyester
Wool
Cotton
None of these
_________ is the first fully synthetic fibre.
Acrylic
Polyester
Nylon
Rayon
PET is a very familiar form of
chemical
monomer
polyester
polyphenyl
