Types of Plastics MCQs for Class 8
Types of Plastics – MCQs
Class: 8 | Subject: Science
Section 3: Synthetic Fibres and Plastics
Topic: Types of Plastics
CBSE Board Examination Preparation
Section 3: Synthetic Fibres and Plastics
Topic: Types of Plastics
CBSE Board Examination Preparation
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 8 Science examination standard.
1. Plastics are made from:
Answer: B. Petrochemicals
Most plastics are synthetic materials derived from petroleum and natural gas through chemical processes.
2. Plastics are:
Answer: B. Non-biodegradable
Plastics do not decompose naturally, causing environmental pollution.
3. Two main types of plastics are:
Answer: B
Plastics are classified based on their behavior on heating.
4. Thermoplastics can:
Answer: A
Thermoplastics soften on heating and can be remoulded.
5. Example of thermoplastic:
Answer: C. PVC
PVC (Polyvinyl Chloride) softens on heating and can be reshaped.
6. Thermosetting plastics:
Answer: C
They become permanently hard after moulding.
7. Bakelite is used for:
Answer: B
Bakelite is heat resistant and an electrical insulator.
8. Melamine is used to make:
Answer: A
Melamine resists heat and fire, ideal for kitchenware.
9. PVC is used for:
Answer: A
PVC is strong, light, and corrosion-resistant.
10. Polythene is a:
Answer: A
It softens on heating and is recyclable.
11. Plastics are poor conductors of:
Answer: A
Hence used as insulators.
12. Teflon is used in:
Answer: A
It is heat resistant and non-reactive.
13. Plastic property:
Answer: C
Plastics are light and durable.
14. Recycling reduces:
Answer: A
Plastic waste harms environment.
15. Thermosetting plastic example:
Answer: B
Cannot be remoulded.
16. Plastic is mouldable due to:
Answer: A
Long polymer chains allow shaping.
17. PET bottles are:
Answer: A
They can be recycled.
18. Plastics resist:
Answer: A
They do not rust like metals.
19. Which is reusable?
Answer: A
They can be reheated and reshaped.
20. Best practice for plastic waste:
Answer: C
Recycling conserves resources and reduces pollution.
