Polymer Technology Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically Phenolic resins Polycarbonates Polytetraflouroethylene(PTFE) Polymethyl methacrylate (PMMA) Phenolic resins Polycarbonates Polytetraflouroethylene(PTFE) Polymethyl methacrylate (PMMA) ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten Bakelite SBR Teflon PVC Bakelite SBR Teflon PVC ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low density polythene as compared to high density polythene is Chemically inert Harder Tougher More flexible Chemically inert Harder Tougher More flexible ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber? Thiokol Carbon Alkylated diphenyl amine Magnesium Thiokol Carbon Alkylated diphenyl amine Magnesium 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. Organic peroxides Hydroflouric acid None of these Sulphuric acid Organic peroxides Hydroflouric acid None of these Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Styrene butadiene rubber (SBR) as compared to natural rubber has Greater amount of heat build up heavy loading Poor tensile strength All of these Poorer resistance Greater amount of heat build up heavy loading Poor tensile strength All of these Poorer resistance ANSWER DOWNLOAD EXAMIANS APP
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