Polymer Technology __________ practically possess no elasticity. Epoxy resin Polysulphide rubber Spandex fibre Vulcanite or ebonite Epoxy resin Polysulphide rubber Spandex fibre Vulcanite or ebonite ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals. Sulphuric acid Organic peroxides Hydroflouric acid None of these Sulphuric acid Organic peroxides Hydroflouric acid None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low pressure Zeigler process of polythene manufacture Employs a pressure of 30 kgf/cm² Achieves an yield of 95-98% based on ethylene Does not use any catalyst for polymerisation Produces very low density polythene Employs a pressure of 30 kgf/cm² Achieves an yield of 95-98% based on ethylene Does not use any catalyst for polymerisation Produces very low density polythene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following is not a natural polymer? Polyisoprene Nucleic acids e.g. RNA and DNA Polysaccharides Polyurethane Polyisoprene Nucleic acids e.g. RNA and DNA Polysaccharides Polyurethane ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Plastic tubes & pipes are generally made by __________ moulding. Compression Extrusion Injection Transfer Compression Extrusion Injection Transfer ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following is not a natural fibre? Viscose rayon Wool Cotton Silk Viscose rayon Wool Cotton Silk ANSWER DOWNLOAD EXAMIANS APP
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