please answer bataiye
Answers
Answer:
A
1.Rayon=Rayon is a regenerated cellulose fiber that is made from natural sources such as wood and agricultural products. It has the same molecular structure as cellulose. The many types and grades of viscose fibers can imitate the feel and texture of natural fibers such as silk, wool, cotton, and linen.
2.Nylon=Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic polyamides. Nylon is a thermoplastic silky material that can be melt-processed into fibers, films, or shapes. It is made of repeating units linked by amide links similar to the peptide bonds in proteins
Answer:
1.Rayon: It is a artficial fibre made up of natural sources such as wood.It has the same molecular mass as cellulose. It used for clothing.
Nylon: It is an artificial fibre. It was first used in februry 1935. It was invented by Wallace carther. It used in circuit boards.
2.Inert metals: It is also called as noble metals. The most noble metal is gold
Alloy:An alloy is a combinations of metals and non metals. It is made by melting two or more elements together. The components of it cannot be seperated by physical means
long answers
1. Thermoplastics are reversible and can be melted to liquid whereas thermosetting plastics can not be melted and are irreversible.
Thermoplastics have secondary bonds between molecular chains whereas thermosatting plastics have primary bonds between molecular chains and held together by strong crosslinks
Thermoplastics have low melting and boiling points whereas thermosetting plastics have high melting and boiling points.
thermoplastics are lower in molecular weight whereas thermosetting plastics have are high in molecular weught.
2. Plastics are a wide range of synthetic or semi-synthetic organic compounds that are malleable. They are of high molecular mass and contain other substances and are derieved from petrochemicals
the types are
1. polyethelyne plastics
2. high density polythene
3. polyvinyl chloride
4. low density polythelene
5. polypropoline
6.polysterene
7. other resins