Question: A copolymer is formed by the combination of two or more monomer molecules [A]. in a chain without the elimination of water. [B]. with the elimination of small amount of water. [C]. of the same monomer by elimination of…

Question: Buna-S is also called [A]. polyurathane [B]. SBR [C]. teflon [D]. bakelite Answer: Option B Explanation: No answer description available for this question.

Question: Ebonite is a/an [A]. highly vulcanised rubber. [B]. natural rubber. [C]. unvulcanised raw rubber. [D]. adhesive. Answer: Option A Explanation: No answer description available for this question.

Question: Condensation polymerisation of __________ produces bakelite. [A]. propylene [B]. phenol & formaldehyde [C]. phenol & acetaldehyde [D]. urea & formaldehyde Answer: Option B Explanation: No answer description available for this question.

Question: Orlon is [A]. a copolymer. [B]. a condensation polymer. [C]. obtained by polymerising vinyl cyanide. [D]. all (a), (b) and (c). Answer: Option C Explanation: No answer description available for this question.

Question: Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its [A]. elasticity [B]. strength [C]. plasticity [D]. weathering characteristics Answer: Option D Explanation: No answer description available…

Question: 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. [A]. organic peroxides [B]. sulphuric acid [C].…

Question: Contact lenses for eyes are made of perspex, which is nothing but [A]. polymethylmethacrylate [B]. polystyrene [C]. unsaturated polyester [D]. polypropylene Answer: Option A Explanation: No answer description available for this question.

Question: Non sulphonated hard bakelites are not used for making [A]. ion-exchange resins [B]. fountain pen barrels [C]. formica table tops [D]. combs Answer: Option A Explanation: No answer description available for this question.

Question: Bristles of tooth brushes are made of [A]. nylon-6 [B]. nylon-66 [C]. polystyrene [D]. PVC Answer: Option B Explanation: No answer description available for this question.