CBSE Class 8 - Chemistry - Synthetic Fibres and Plastics - Plastics Uses and Its Impact on Environment (Q and A)
Q1: What is a plastic?
Answer: Plastic is also a polymer like the synthetic fibre. All plastics do not have the same arrangement of units. In some, it is linear, whereas in others it is cross-linked.
Q2: What are the main properties of plastics?
Answer:
① Plastic is easily mouldable in all types of possible shapes.
② Most plastics are light, chemically stable and do not rust. The weight of plastic is less when compared to that of metal.
③ Some types of plastics are good insulaters and have low thermal conductivity.
④ Plastic can be recycled, coloured, reused, rolled into sheets or made into wires.
⑤ Most plastics have poor heat resistance.
⑥ Plastics have good durability (lasts longer).