Here we are providing Class 8 Science Objective Chapter – 3 Synthetic Fibres and Plastics because its very important for Class 8 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 8 Science Objective Chapter – 3 Synthetic Fibres and Plastics is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 8 Science Objective Chapter – 3 Synthetic Fibres and Plastics Wastewater Story 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 8 Science Objective Chapter – 3 Synthetic Fibres and Plastics
1.Which of the following is natural fibre?
( A ) Rayon
( B ) Nylon
( C ) Polyester
( D ) Cotton
2.What is the other name for artificial silk?
( A ) Nylon
( B ) Rayon
( C ) Acrylic
( D ) Polyester
Ans – ( B )
3.Which of the following is synthetic fibre?
( A ) Nylon
( B ) Cotton
( C ) Silk
( D ) Wood
Ans – ( A )
4.Which fibre is used as artificial wool?
( A ) Acrylic
( B ) Rayon
( C ) Nylon
( D ) Cotton
Ans – ( A )
5.The basic component of plant fibres is
( A ) protein
( B ) cellulose
( C ) starch
( D ) none of these
Ans – ( B )
6.Polymers are made up of small units called
( A ) layers
( B ) molecules
( C ) cells
( D ) monomers
Ans – ( D )
7.Raw materials for preparation of synthetic fibres are obtained from
( A ) coal
( B ) petroleum
( C ) natural gas
( D ) all of these
Ans – ( D )
8.The strongest synthetic fibre is
( A ) nylon
( B ) rayon
( C ) polyester
( D ) acrylic
Ans – ( A )
9.Which of the following is known as artificial silk?
( A ) Nylon
( B ) Rayon
( C ) Polyester
( D ) Silk
Ans – ( B )
10.Wood pulp is used to make
( A ) plastic
( B ) wool
( C ) jute
( D ) rayon
Ans – ( D )
11.In which year was nylon made?
( A ) 1931
( B ) 1964
( C ) 1948
( D ) 1950
Ans – ( A )
12.Which of the following is a natural fibre?
( A ) Wool
( B ) Nylon
( C ) PVC
( D ) Polythene
Ans – ( A )
13.Which fibre is used as artificial wool?
( A ) Acrylic
( B ) Rayon
( C ) Nylon
( D ) Cotton
Ans – ( A )
14.Melamine is
( A ) thermoplastic polymer
( B ) thermosetting polymer
( C ) fibre
( D ) elastomer
Ans – ( B )
15.Which of the following fibre has highest tensile strength?
( A ) Cotton
( B ) Silk
( C ) Rayon
( D ) Nylon
Ans – ( D )
16.Fibre produced in factories is called
( A ) man-made fibre
( B ) natural fibre
( C ) synthetic fibre
( D ) both ( A ) and (c)
Ans – ( D )
17.Common variety of polyester is
( A ) terylene
( B ) polymer
( C ) viscose
( D ) spinneret
Ans – ( A )
18.PET is a
( A ) polyester
( B ) polyamide
( C ) nylon
( D ) thermosetting polymer
Ans – ( A )
19.Polymers are made up of small units called
( A ) layers
( B ) molecules
( C ) cells
( D ) monomers
Ans – ( D )
20.Which of the following cannot be recycled?
( A ) Toys
( B ) Cooker handles
( C ) Carry bags
( D ) Plastic chair
Ans – ( B )
21.Which of the following polyester is made by blending polyester and cotton?
( A ) Terrywool
( B ) Terrycot
( C ) Terrysilk
( D ) PET
Ans – ( B )
22.The plastic which cannot be recycled is
( A ) jute
( B ) rayon
( C ) petrochemicals
( D ) bakelite
Ans – ( D )
23.Wood pulp is used to make
( A ) plastic
( B ) wool
( C ) jute
( D ) rayon
Ans – ( D )
24.Bakelite is an example of
( A ) fibre
( B ) elastomer
( C ) nylon
( D ) thermosetting polymer
Ans – ( D )
25.The property of materials by which they can be moulded into any shape is called
( A ) conductivity
( B ) elasticity
( C ) plasticity
( D ) none of these
Ans – ( C )
26.Which term is used for polymers made up of a large number of glucose units?
( A ) Protein
( B ) Fructose
( C ) Cellulose
( D ) Polyester
Ans – ( C )
27.Which of the following is a thermoplastic?
( A ) Bakelite
( B ) Melamine
( C ) PVC
( D ) All of these
Ans – ( C )
28.Which of the following is non-biodegradable?
( A ) Paper
( B ) Cotton cloth
( C ) Wood
( D ) Plastic
Ans – ( D )
29.Which of the following are made from thermosetting plastic?
( A ) Bottles
( B ) Crockery
( C ) Shoes
( D ) Handbags
Ans – ( B )
30.Cellulose is made up of a large number of ………………… units.
( A ) glucose
( B ) fructose
( C ) protein
( D ) none of these
Ans – ( A )
31.Polycarbonate is used to make
( A ) compact discs
( B ) straws
( C ) bottles
( D ) jars
Ans – ( A )
32.Synthetic fibres are:
( A ) strong
( B ) durable
( C ) hining
( D ) all of these
Ans – ( D )
33.Synthetic fibres are
( A ) durable
( B ) wrinkle free
( C ) economical
( D ) all of these
Ans – ( D )
34.Which of the following is not thermoplastics:
( A ) acrylic
( B ) polyethylene
( C ) polystyrene
( D ) melamine
Ans – ( D )
35.Plastics that retain their plasticity on repeated heating are called
( A ) thermosetting plastics
( B ) thermoplastics
( C ) thermal plastics
( D ) none of these
Ans – ( B )
36.Wire made from which fibre is strongest:
( A ) nylon
( B ) cotton
( C ) wool
( D ) steel
Ans – ( A )
37.Which of the following is a characteristic of plastics?
( A ) Electrical conductors
( B ) Heat conductors
( C ) Biodegradable
( D ) Non-biodegradable
Ans – ( D )
38.PET is form of:
( A ) steel
( B ) glass
( C ) polyester
( D ) nylon
Ans – ( C )
39.Plastic that can resist fire is
( A ) bakelite
( B ) melamine
( C ) PVC
( D ) duroplast
Ans – ( B )
40.Which of the following is used to make non-stick cookwares:
( A ) polyester
( B ) teflon
( C ) rayon
( D ) nylon
Ans – ( B )
41.Which of the following is an example of animal fibre?
( A ) Cotton
( B ) Jute
( C ) Silk
( D ) Nylon
Ans – ( C )