Question

G7BPLM
1. Why some fibres are called Synthetic?Explain. (AS)
2. What are thermosetting plastics. Give two examples. (AS)
3. Give reasons. “Why plastic containers are used as storing dev
Application of concepts
1. How synthetic fibres have changed our daily life?(AS,)
2. What would happen, if we make electric switches with thermo
3. What could be the consequences if plastics are not properly di
Distribution 2020-21​

Answer 1

Answer:

1)some fibres are called synthetic fibres because they are formed by using chemicals and they are man made.

2)plastics when moulded once, cannot be softened again are called thermosetting plastics.

example:bakelite and melamine

Answer 2

1. Some fibres are called as synthetic fibers because these are manmade fibers prepared by using chemicals. These are made of small units that join together to form long chains.
2. Common examples of thermoset plastics and polymers include epoxy, silicone, polyurethane and phenolic. ... Different thermosets provide different advantages when used as a production material. For example, epoxies are highly elastic, tough and resistant to many chemicals while phenolic is highly flame resistant.
3. Plastic containers are used as storage devices because it wont get reacted with the substance it stores. Metals can cause some reaction if the substance stored is reactive.

Application of concepts:

1. synthetic life changed our life many ways moderatly because they are easy and comfortable to wear , they are easy to make as they are artificial.. They resemble to some naturl fibres too. this way it helped human beings from abstract clothings.
2. Some fabrics do not occur in the nature are hence called synthetic fibres.
3. If it is not disposed properly then it will cause a lot of land pollution and hazardous to environment. Sometimes people throw the leftover food, packed in plastic bags here and there and by eating those plastics many animals die and suffer from diseases. ... It is necessary to have a proper plastic disposal system.