Class 8 Synthetic Fibres And Plastics CBSE Questions & Answers

Class 8 · Synthetic Fibres And Plastics

This is Science Class 8 Synthetic Fibres and Plastics CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Fibres are :
  • A
    artificial
  • B
    natural
  • C
    all of these
    Correct
  • D
    synthetic
2
PVC is :
  • A
    paravinyl chloride
  • B
    polyvinyl chloride
    Correct
  • C
    paravenyl chloride
  • D
    polyvenyl chloride
3
Which of the following set of features belong to thermoplastics ?
  • A
    soft and less brittle
    Correct
  • B
    hard and less brittle
  • C
    hard and strong
  • D
    soft and brittle
4
Cellulose is used to prepare :
  • A
    Rayon
    Correct
  • B
    Acrylic
  • C
    Nylon
  • D
    Polyethylene
5
The oldest synthetic plastic is :
  • A
    Melamine
  • B
    Polythene
  • C
    Polyester
  • D
    Bakelite
    Correct
6
Best alternative to wool is :
  • A
    Nylon
  • B
    Acrylic
    Correct
  • C
    Bakelite
  • D
    Rayon
7
Statement incorrect for synthetic fibres is/are:
  • A
    long lasting
  • B
    all the above
  • C
    very expensive
    Correct
  • D
    non-biodegradable
8
First synthetic fibre formed from natural material is:
  • A
    Acrylon
  • B
    Polyester
  • C
    Nylon
  • D
    Rayon
    Correct
9
First man-made fibre produced chemically is:
  • A
    Nylon
    Correct
  • B
    Terylene
  • C
    Polyester
  • D
    Rayon
10
The lightest plastic material is :
  • A
    Polythene
  • B
    Polypropylene
    Correct
  • C
    Polyester
  • D
    Bakelite
11
Which of the following fibres are made from petroleum products?
  • A
    all of these
    Correct
  • B
    decron
  • C
    terylene
  • D
    acrylon
12
A strand of a substance is called :
  • A
    fibre
    Correct
  • B
    fabric
  • C
    yarn
  • D
    thread
13
Which one is artificial silk?
  • A
    Fibroin
  • B
    Nylon
  • C
    Rayon
    Correct
  • D
    Teflon
14
When plastics are burnt they release:
  • A
    nitrogen gas
  • B
    oxygen gas
  • C
    toxic gases
    Correct
  • D
    biogas
15
Which of the following is incorrect regarding plastics:
  • A
    resistant to weather
  • B
    durable
  • C
    non recyclable
    Correct
  • D
    non biodegradable