plastic resin production

They are represented by substances like resins, gums, alkaloids et..

Some halides of carbon find wide use in industry. For example, Carbon tetrachloride is used as a fire extinguisher under the name pyrene. Carbon tetrachloride is a common solvent for plastics, resins etc. Freon (CF 2 Cl 2 ) is used as a refrigerant..

Static Electricity - Static electricity was known to people more than 2500 years ago. The Greeks knew about the attractive property of the resin amber. They knew that by rubbing amber with cloth, it could be made to attract small feathers. The Greek name for amber was 'elektron'. After ab..

Store and assimilate food Give mechanical strength by maintaining turgidity Prepare food if chlorophyll is present Store waste products like tanin, gum, crystals and resins..

Polymerization - is the process of formation of large molecules or macromolecules with high molecular weight from small molecules. 'Poly' means many and 'meros' means parts in Greek. The simple compounds from which these macromolecules are made are called monomers . When two monomers combine, a dim..

In plants, breakdown of substances is much slower than in animals. Hence accumulation of waste is much slower and there are no special organs of excretion. Green plants in darkness or plants that do not contain chlorophyll produce carbon dioxide and water as respiratory waste products. C..

A quick count of industries based on forest produce reveals timber, paper, resin and gum, lac, natural oils, minor foods products, medicines, sports equipment. Industries consider the forest as merely a source of raw material for their factories. They neither are interested in..

Forests are the invaluable wealth of a country and a renewable natural resource. They are beneficial to man in several ways. a) Forests provide fuel wood, timber, paper, bamboo, rayon, cane etc. b) Forests also provide a large number of important products such as essential oils, tannins,..

Question: What direct value does a forest have for man? Answer: Forests contribute to the economic development of our country by providing goods and services to people and industry. They are intimately linked with our culture and civilization. Forests are useful to humans for the followi..

Pollution of Soil Surface - Large quantity of solid wastes like unused and rejected chemicals (like calcium carbonate, magnesium sulphate, ferrous chloride, ferrous oxide, radioactive wastes, fly ashes, sludge, press mud, saw dust, bottles, plastic materials) unwanted industrial wastes ge..