Question

4.discuss the disadvantage of plastic?
5. synthetic fibre and natural fibre are both made of polymers. how are they different?​

Answer 1

Answer:

Answer:the disadvantage of plastic

The demerits of plastic are: 1) Plastic bags thrown carelessly on roads get into drains and the sewer system and choke them. ... 2) Plastics give out harmful gases upon heating or burning which causes air pollution and many health problems. 3) Plastic bags filled with garbage is thrown away in the open.

synthetic fibre and natural fibre are both made of polymers. how are they different?

Rayon is a regenerating natural fiber (cellulose fiber), which is made from the wood pulp. Whereas nylon or polyester, fibers are purely synthetic polymers, made entirely from chemicals.

Answer 2

Answer:

4. The disadvantages of plastic are:

- Plastic bags thrown carelessly on roads get into drains and the sewer system and choke them. As a result sewage water spills on road and causes spread of diseases.

- Plastics give out harmful gases upon heating or burning which causes air pollution and many health problems.

- Plastic bags filled with garbage is thrown away in the open. When stray animals look for food in these bags, they swallow plastic bags along with food.

5. Synthetic fibres are made up from industrial fibres while the natural fibres are obtained from the nature.

Hope it helps you.......