1. Where do the raw materials for making synthetic
fabrics come from?
2. Why is the name ‘nylon given to a certain synthetic
fabric?
3. Which synthetic material can be blended with
cotton and wool? What are the names by which
these two popular blended fabrics are known?
4. Which chemical group, large in number, is polyester
made from? Name some of its monomers.
5. Compare the characteristics of thermoplastics and
thermosetting plastics.
6. What is an organic fertiliser?
7. Name seven micronutrients provided by the
fertilisers.
8. What do you understand by the term 'tensile
strength of a fibre?
9. Name a few polymers found in the human body.
0. Are detergents better than soap? If yes, then in what
ways?
newer the following questions in detail:
Answers
Answer:
Explanation:
ans1. Synthetic fibres are manufactured using plant materials and minerals: viscose comes from pine trees or petrochemicals, while acrylic, nylon and polyester come from oil and coal. Viscose fibre is obtained from the cellulose; versatility allows imitating materials such as cotton or silk.
ans2.The name nylon given to a certain synthetic fibres becoz the Inventors of this fibre... belongs from " Ny that means New York.. and lon that means London. " And the inventors from that country.
ans3. Terrylene is the synthetic material can be blended with cotton and wool.
ans4. Polyester makes up about 18% of world polymer production and is the fourth-most-produced polymer after polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC). PET consists of polymerized units of the monomer ethylene terephthalate, with repeating (C10H8O4) units.
ans5.hermoset vs. Thermoplastics. ... The primary physical difference is that thermoplastics can be remelted back into a liquid, whereas thermoset plastics always remain in a permanent solid state. Think of thermoplastics as butter – butter can be melted and cooled multiple times to form various shapes.
ans6. Organic fertilizers are fertilizers derived from animal matter, animal excreta, human excreta, and vegetable matter. Naturally occurring organic fertilizers include animal wastes from meat processing, peat, manure, slurry, and guano
ans7. Phosphorus (P) ...
Potassium (K) ...
Calcium (Ca) ...
Magnesium (Mg) ...
Sulfur (S) ...
Boron (B)
Chlorine (Cl)
ans8.Tensile strength is the measurement of the force required to pull something such as rope, wire or a structural beam to the point where is break. The tensile strength is the maximum amount of tensile stress that it can take before failure, for example breaking.
ans9.he human body contains many natural polymers, such as proteins and nucleic acids. Cellulose, another natural polymer, is the main structural component of plants. ... Starch is a condensation polymer made up of hundreds of glucose monomers, which split out water molecules as they chemically combine.
ans0. Detergents are better cleansing agents than soaps because they can be used even with hard water. The charged ends of detergents do not form insoluble precipitates with calcium and magnesium ions in hard water.
THANK U