Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well.
You can refer to NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers
Choose the correct option in the following questions:
Question 1.
What is the other name for artificial silk?
(a) Nylon
(b) Rayon
(c) Acrylic
(d) Polyester
Answer
Answer: (b) Rayon
Question 2.
Which fibre is used as artificial wool?
(a) Acrylic
(b) Rayon
(c) Nylon
(d) Cotton
Answer
Answer: (a) Acrylic
Question 3.
Polymers are made up of small units called
(a) layers
(b) molecules
(c) cells
(d) monomers
Answer
Answer: (d) monomers
Question 4.
The strongest synthetic fibre is
(a) nylon
(b) rayon
(c) polyester
(d) acrylic
Answer
Answer: (a) nylon
Question 5.
Wood pulp is used to make
(a) plastic
(b) wool
(c) jute
(d) rayon
Answer
Answer: (d) rayon
Question 6.
Which of the following is a natural fibre?
(a) Wool
(b) Nylon
(c) PVC
(d) Polythene
Answer
Answer: (a) Wool
Question 7.
Melamine is
(a) thermoplastic polymer
(b) thermosetting polymer
(c) fibre
(d) elastomer
Answer
Answer: (b) thermosetting polymer
Question 8.
Fibre produced in factories is called
(a) man-made fibre
(b) natural fibre
(c) synthetic fibre
(d) both (a) and (c)
Answer
Answer: (d) both (a) and (c)
Question 9.
PET is a
(a) polyester
(b) polyamide
(c) nylon
(d) thermosetting polymer
Answer
Answer: (a) polyester
Question 10.
Which of the following cannot be recycled?
(a) Toys
(b) Cooker handles
(c) Carry bags
(d) Plastic chair
Answer
Answer: (b) Cooker handles
Question 11.
The plastic which cannot be recycled is
(a) jute
(b) rayon
(c) petrochemicals
(d) bakelite
Answer
Answer: (d) bakelite
Question 12.
Bakelite is an example of
(a) fibre
(b) elastomer
(c) nylon
(d) thermosetting polymer
Answer
Answer: (d) thermosetting polymer
Question 13.
Which term is used for polymers made up of a large number of glucose units?
(a) Protein
(b) Fructose
(c) Cellulose
(d) Polyester
Answer
Answer: (c) Cellulose
Question 14.
Which of the following is non-biodegradable?
(a) Paper
(b) Cotton cloth
(c) Wood
(d) Plastic
Answer
Answer: (d) Plastic
Question 15.
Which of the following is natural fibre obtained from plants?
(a) Cotton
(b) Wool
(c) Rayon
(d) Ketone
Answer
Answer: (a) Cotton
Match the following items given in Column ‘A with that in Column ‘B’.
| Column ‘A’ | Column ‘B’ |
| Cotton | Thermoplastic |
| Nylon | Polyester |
| PVC | Biodegradable |
| Bakelite | Artificial fibres |
| PET | Artificial wool |
| Acrylic | Chain of glucose units |
| cellouse | Non-biodegradable |
| Paper | Natural fibre |
| Plastic Bags | Cook wares |
| Teflon | Thermosetting |
Answer
Answer:
| Column ‘A’ | Column ‘B’ |
| Cotton | Natural fibre |
| Nylon | Artificial fibres |
| PVC | Thermoplastic |
| Bakelite | Thermosetting |
| PET | Polyester |
| Acrylic | Artficial wool |
| cellouse | Chain of glucose units |
| Paper | Biodegradable |
| Plastic Bags | Non-biodegradable |
| Teflon | Cook wares |
Fill in the blanks with appropriate words:
1. Synthetic fibres are made by ………….
Answer
Answer: human beings
2. Many small units combine to form a large single unit called a ………….
Answer
Answer: polymer
3. A nylon wire is …………. than steel wire.
Answer
Answer: stronger
4. All the synthetic fibres are prepared using raw materials of petroleum origin called ………….
Answer
Answer: petrochemicals
5. Plastics are …………. conductors of electricity.
Answer
Answer: poor
6. Nylon was prepared from …………. , …………. and ………….
Answer
Answer: coal, water, air.
State whether the statements given below are True or False’.
1. All fibres are made up of very large units which in turn are made up of many small units.
Answer
Answer: True
2. Nylon was also known as artificial silk in China.
Answer
Answer: False
3. Acrylic is an artificial wool.
Answer
Answer: True
4. Plastics are light, strong and durable.
Answer
Answer: True
5. It is not advised to store food items in plastic containers as it may react with the w ills of container.
Answer
Answer: False
6. Bake lite is poor conductor of electricity.
Answer
Answer: True
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