पपफ्स Flax
5. संघनन Condensation
4. प्राकृतिक तंतु तथा संश्लिष्ट तंतु को परिभाषित करें। प्रत्येक का दो-दो उदाहरण लिखें।
Define natural fibres and synthetic fibres. Give two examples of each.
Answers
Answer:
5-Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor. Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water.
5-Natural fibers are made from plant, animal and mineral sources.Natural fibers can be defined as substances produced by plants and animals that can be spun into filament, thread or rope and in a next step be woven, knitted, matted or bound. The oldest fibres used by mankind are flax, cotton, and silk, but even jute and coir have been cultivated since antiquity.
e.g. Cotton, Silk
Synthetic fibres are derived from chemical substances. They are produced by the polymerisation of different monomers. Examples of synthetic fibres include polyester, acrylic, viscose, polyamide, latex and rayon