WorksheetsSYNTHETIC FIFBRES AND PLASTIC
Total questions: 15
Worksheet time: 11mins
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
Match column I with column II and mark the correct option from the codes given below.
Column I Column II
Polyester (i) Prepared by using woodpulp
Teflon (ii) Used for making para chute and stockings
Rayon (iii) Used for making non-stick cook wares
Nylon (iv) Fabrics do not wrinkle easily
- (iii), - (iv), - (i), - (ii)
- (iv), - (iii), - (i), - (ii)
- (iv), - (iii), - (ii), - (i)
- (i), - (ii), - (iii), - (iv
Choose the correct option for the given statements.I. Plastics are generally good conductors of electricity.II. Ropes made by bake lite are used in cranes and elevators.III. Teflon is a special plastic on which oil and water do not stick.IV. Plastic is non-biodegradable, hence not environment friendly.
(i),(ii),(iii),(iv) T T F F
(i),(ii),(iii),(iv) F F T T
(i) ,(ii), (iii),(iv) T F T F
(i) ,(ii) ,(iii) ,(iv) F T F T
Read the given statements and mark the appropriate answer.
Statement 1: Polyester is synthesised from petrochemicals by linking ester units.
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.
Statement 1 is true and statement 2 is false.
Both statements 1 and 2 are false.
Which of the following is not a characteristic of plastics?
Plastics are poor conductors of heat.
Plastics are insoluble in water.
Plastics are non-inflammable.
Plastics do not react with water and air.
Sneha has classified a few materials as shown in the table.
S. No. Material Type/Nature
1. Nylon Synthetic and non biodegradable
2. Jute Natural and non-biodegradable
3. Coir Synthetic and biodegradable
4. Wool Natural and biodegradable
5. Acrylic Blended and biodegradable
6. Polyester Synthetic and non-biodegradable
The materials which are classified incorrectly are
1, 3 and 4 only
2, 4 and 5 only
2, 3 and 5 only
1, 3 and 6 only
Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?I. Refrigerators have an insulating wool of plastics.II. Electric wires have a plastic coating.III. Chemicals are stored in plastic containers.IV. Parachutes are made from plastics.
II, III and IV only
III and IV only
I only
II only
Read the following statements carefully.P. I am extensively used in the healthcare industry but my one disadvantage is that I am non-biodegradable.Q. I am very familiar form of polyester and used for making bottles, utensils, films, wires, etc.R. I am artificial silk and mixed with wool to make carpets. P, Q and R are respectively
PET, Rayon and Plastic
Rayon, Plastic and PET
Plastic, Rayon and PET
Plastic, PET and Rayon
_________ is the first fully synthetic fibre.
Acrylic
Polyester
Nylon
Rayon
PET is a very familiar form of
chemical
monomer
polyester
polyphenyl
