Class 8 Science – Chapter 3
Synthetic Fibres and Plastics
Important Exam Questions
🟢 Very Short Answer Questions (1 Mark)
- What are synthetic fibres?
- Name the fibre that looks like silk.
- Which plastic is used to make electrical switches?
- Give one example of thermoplastic.
- From which raw material is nylon made?
🟡 Short Answer Questions (2–3 Marks)
- Why is rayon called a semi-synthetic fibre?
- Write any two characteristics of synthetic fibres.
- Differentiate between thermoplastic and thermosetting plastic.
- Why should plastics not be burnt?
- What is meant by biodegradable and non-biodegradable substances?
🔵 Short Answer Questions – Concept Based
- Why are plastic containers preferred for storing food?
- Why is nylon used for making parachutes and ropes?
- Why are synthetic fibres wrinkle-resistant?
- What happens when plastics are thrown in water bodies?
🟣 Long Answer Questions (4–5 Marks)
- Explain different types of synthetic fibres with examples.
- Write advantages and disadvantages of plastics.
- Explain why plastic is considered a threat to the environment.
- Describe the properties of plastics that make them useful in daily life.
🔴 Case-Based / HOTS Questions
- Plastic bags block drains during rains. (a) Why does this happen? (b) Suggest two ways to reduce plastic pollution.
- A student wants a material that is strong, lightweight, and water-resistant. Which synthetic fibre will you suggest? Give reasons.
⭐ These questions are very important for exams – prepare thoroughly
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