Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance. Polyurathane Polycarbonate Polysulphone Polyester TRUE ANSWER : ? YOUR ANSWER : ?
Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6. -20 to 25 50 to 75 250-280 100 to 150 TRUE ANSWER : ? YOUR ANSWER : ?
Plasticisers are added to synthetic plastics to Develop new improved properties not present in the original resin Impart flexibility Improve workability during fabrication All of these TRUE ANSWER : ? YOUR ANSWER : ?
Molecular weight of polymers are in the range of 10²-10⁷ 10 to 10³ 10⁹-10¹¹ 10⁷-10⁹ TRUE ANSWER : ? YOUR ANSWER : ?
Polypropylene is preferred to polythene, because the former is Stronger Harder Non-inflammable Both B & C TRUE ANSWER : ? YOUR ANSWER : ?
Thermosetting resins/polymers as compared to thermoplastic ones are Soluble in all organic solvents Easily reshaped & reused More brittle Formed by addition polymerisation only TRUE ANSWER : ? YOUR ANSWER : ?
Condensation polymerisation of __________ produces bakelite. Phenol & acetaldehyde Propylene Phenol & formaldehyde Urea & formaldehyde TRUE ANSWER : ? YOUR ANSWER : ?
Polythene is a/an Thermosetting material None of these Addition polymerisation product Condensation polymerisation product TRUE ANSWER : ? YOUR ANSWER : ?