4. Polystyrene
G Very Short Answer Type Questions
1. What are synthetic fibres?
2. What is a polymer?
3. What is polycotton?
4. What do you mean by thermoplastics?
5. Who invented bakelite?
Answers
Answer:
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. the examples of synthetic fibres are nylon, rayon, acrylic, polyester etc. 2)A polymer is a molecule, made from joining together many small molecules called monomers. ... Proteins have polypeptide molecules, which are natural polymers made from various amino acid monomer units. Nucleic acids are huge natural polymers made up of millions of nucleotide units.
Explanation:
3)polycotton is a fabric that is an amalgamation of polyester and cotton. 4)Thermoplastics are defined as polymers that can be melted and recast almost indefinitely. They are molten when heated and harden upon cooling. When frozen, however, a thermoplastic becomes glass-like and subject to fracture.5)Leo Baekeland(Please follow meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee)
Answer:
1.Synthetic fibres are made only from polymers found in natural gas and the by-products of petroleum.
2.A natural or artificial chemical compound consisting of large molecules.
3.Fabric which is made from a mixture of cotton and polyester fibre is called polycotton.