Showing posts with label class8-chemistry. Show all posts
Showing posts with label class8-chemistry. Show all posts

Thursday, 22 April 2021

CBSE Class 8 - Chemistry - Synthetic Fibres and Plastics - Plastics Uses and Its Impact on Environment (Q and A)(#class8Science)(#eduvictors)

CBSE Class 8 - Chemistry - Synthetic Fibres and Plastics - Plastics Uses and Its Impact on Environment (Q and A)

CBSE Class 8 - Chemistry - Synthetic Fibres and Plastics - Plastics Uses and Its Impact on Environment (Q and A)(#class8Science)(#eduvictors)

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.

CBSE Class 8 - Chemistry - Synthetic Fibres and Plastics - Plastics Uses and Its Impact on Environment (Q and A)(#class8Science)(#eduvictors)


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).