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
Dress materials made from synthetic fibres are :
  • A
    non airy
    Correct
  • B
    quite airy
  • C
    good absorbant of sweat
  • D
    non allergic
2
We should not wear synthetic clothes in kitchen because :
  • A
    they can easily catch fire
    Correct
  • B
    they are non conductors of heat and electricity
  • C
    they are chemically inert
  • D
    they are water proof
3
Read the following statements:i. Plastic bags can choke the drains.ii. Mosquitoes cannot grow in such choked drains.
  • A
    both are wrong
  • B
    both are correct
  • C
    Statement i) is wrong and ii) is correct
  • D
    Statement ii) is wrong and i) is correct
    Correct
4
This symbol represents :
Question 4 figure 1
  • A
    reduce
  • B
    reuse
  • C
    reverse
  • D
    recycle
    Correct
5
Dying refers to :
  • A
    applying recycle process
  • B
    applying colour
    Correct
  • C
    None of these
  • D
    non repairable damage to fibre
6
It is a hard white solid and used as a sizing agent in the paper industry. This is:
  • A
    bakelite
  • B
    polyvinylchloride
  • C
    polypropylene
  • D
    melamine
    Correct
7
It is a hard white solid and used as a sizing agent in the paper industry. This is:
  • A
    melamine
    Correct
  • B
    bakelite
  • C
    polyvinylchloride
  • D
    polypropylene
8
A user of synthetic fibres feels uncomfortable in warm weather :
  • A
    synthetic fibres does not shrink
  • B
    synthetic fibres provide resistance to fungal attack
  • C
    synthetic fibres do not breathe well
    Correct
  • D
    synthetic fibres are light yet strong
9
Which synthetic fibre is the jacket shown in image made up of ?
Question 9 figure 1
  • A
    acrylic
  • B
    polyester
  • C
    nylon
    Correct
  • D
    rayon
10
Read the following statements :i) Nylon is manufactured from coal, water and air.ii) Nylon is a natural fibre.
  • A
    both are correct
  • B
    both are wrong
  • C
    Statement i) is correct but ii) is wrong.
    Correct
  • D
    Statement ii) is correct but i) is wrong.
11
The toy shown in the image is made up of a :
Question 11 figure 1
  • A
    plastic coir
  • B
    thermoplastic
    Correct
  • C
    thermosetting plastic
  • D
    natural rubber
12
Nylon is a:
  • A
    true synthetic fibre
    Correct
  • B
    natural fibre
  • C
    regenerated fibre
  • D
    both true synthetic fibre & regenerated fibre
13
The T- shirt shown in the image is made of :
Question 13 figure 1
  • A
    silk
  • B
    nylon
  • C
    polyester fabric
    Correct
  • D
    artificial silk
14
The cap shown in the image must be made of :
Question 14 figure 1
  • A
    nylon
  • B
    rayon
  • C
    acrylic
    Correct
  • D
    wool
15
Yarn is twisted to form:
  • A
    fabric
  • B
    fibre
  • C
    plastic
  • D
    thread
    Correct