Polymer Technology Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten Either B or C Saturated polyester Polystyrene Polyurathane Either B or C Saturated polyester Polystyrene Polyurathane ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Neoprene is rendered non-inflammable, because of The presence of chlorine atoms in its monomer Its linear chain structure Its cross-linked structure The absence of chlorine atoms in its monomer The presence of chlorine atoms in its monomer Its linear chain structure Its cross-linked structure The absence of chlorine atoms in its monomer ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer? PTFE Buna-S Polycaprolactum PMMA PTFE Buna-S Polycaprolactum PMMA ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following rubbers has the widest service temperature range (-75 to 275°C) ? Nitrile rubber Silicone rubber Silicon rubber Butyl rubber Nitrile rubber Silicone rubber Silicon rubber Butyl rubber ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Zeigler - Natta catalyst (AlR₃ - AlCl₃) is used in the polymerisation of Styrene Vinyl acetate Propylene Vinyl chloride Styrene Vinyl acetate Propylene Vinyl chloride 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. None of these Sulphuric acid Organic peroxides Hydroflouric acid None of these Sulphuric acid Organic peroxides Hydroflouric acid ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS