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
Recycled plastic can be produced from :
  • A
    used thermoplastic
    Correct
  • B
    used thermosetting plastic
  • C
    all synthetic fibres
  • D
    unused thermosetting plastic
2
These telephone sets are made up of :
Question 2 figure 1
  • A
    Bakelite
    Correct
  • B
    PET
  • C
    PVC
  • D
    Melamine
3
These Japanese bottles are made of :
Question 3 figure 1
  • A
    PVC
  • B
    PET
    Correct
  • C
    PTFE
  • D
    Terylene
4
The bowls shown in image must be made of :
Question 4 figure 1
  • A
    melamine
    Correct
  • B
    bakelite
  • C
    Polystyrene
  • D
    Polyvinylchloride
5
Sunita found that a plastic can be moulded into any shape one wants and a number of times, such plastic is:
  • A
    bakelite
  • B
    all of them
  • C
    nylon
    Correct
  • D
    melamine
6
Read the following statements:i) We should not burn plastic materials.ii) Fumes produced by burning plastics are carcinogenic.
  • A
    Statement ii) is wrong and i) is correct
  • B
    both are wrong
  • C
    both are correct
    Correct
  • D
    Statement i) is wrong and ii) is correct
7
Choose the correct pair :
  • A
    Leftover foodstuff : non biodegradable
  • B
    Paper : biodegradable
    Correct
  • C
    Cans : biodegradable
  • D
    Cotton cloth : non biodegradable
8
Which plastic this symbol indicates?
Question 8 figure 1
  • A
    PET
    Correct
  • B
    PTFE
  • C
    PP
  • D
    PVC
9
Which plastic this symbol indicates?(it is the first of bad ones)
Question 9 figure 1
  • A
    PTFE
  • B
    PP
  • C
    PVC
    Correct
  • D
    PET
10
This symbol is for another plastic to be avoided. This is :
Question 10 figure 1
  • A
    Polyvinyl chloride
  • B
    Polystyrene
    Correct
  • C
    Polypropylene
  • D
    teflon
11
Which of the following is incorrect regarding plastics?
  • A
    durable
  • B
    resistant to weather
  • C
    non biodegradable
  • D
    non recyclable
    Correct
12
Crushing the plastic bottles and containers initiates its :
  • A
    biosynthesis
  • B
    rejuvenation
  • C
    recycling
    Correct
  • D
    degradation
13
PIC refers to :
  • A
    Plastic Ideological Code
  • B
    Plastic Ignition Code
  • C
    Plastic Identification Code
    Correct
  • D
    Plastic Imaging Code
14
_____ of plastics releases foul smell and toxic gases :
  • A
    biodegradation
  • B
    bioremediation
  • C
    Recycling
  • D
    incineration
    Correct
15
Match the following :i) Thermoplastic…………………a) Polyester + cottonii) Rayon………………………….b) cannot be recyclediii) Acrylic…………………………c) artificial silkiv) Thermosetting plastic……….d) cheaper than woolv) Terylene………………………e) can be recycled
  • A
    i.b,ii.d,iii.e, iv.c, v.a
  • B
    i.d,ii.a,iii.b, iv.e, v.c
  • C
    i.e,ii.c,iii.d, iv.b, v.a
    Correct
  • D
    i.c,ii.e,iii.d, iv.a, v.b