Bihar Board Class 12 (Science) Polymers — practice questions
50 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Bihar Board Class 12 (Science) Polymers in the app →Polythene is best classified as an:Who proposed in 1920 that polymers are covalently bonded macromolecules?Which chemist coined the word polymer in 1833?Which of these materials is a natural polymer that has been used for centuries?Which natural polymer is the main constituent of wood and paper?The repeat unit of polyethylene is derived from which monomer?Silicones owe their name to a backbone containing which element besides oxygen?What is the process of joining many small monomer molecules into a covalently bonded chain or network called?Which pair of monomers gives the polyester PET?A polymer built from only one type of repeat unit is known as what?Ethylene-vinyl acetate has more than one variety of repeat unit. How is it classified?In a polymer chain, alternating placement of substituents on opposite sides is called what?What does an isotactic polymer have along its chain?A polymer warmed above its glass-transition temperature behaves in what way?Which of these is a first-order phase transition in polymers?Close-meshed cross-linking between polymer chains leads to which class of material?Branched and unbranched polymers are usually of which type?What does the degree of polymerisation of a chain measure?Highly branched polymers tend to have which kind of solid structure?Polystyrene is made by which kind of polymerisation, where monomers join the chain one at a time?Polyesters are typical products of which type of reaction?Most common addition polymers are made from monomers containing which feature?Which of these is an addition polymer formed from an unsaturated monomer?Saran wrap is an addition copolymer of vinyl chloride and which other monomer?Polyethylene glycol is formed by ring opening of which monomer?Why are addition polymers generally non-biodegradable?Which polymer was the first useful addition polymer, discovered by accident at ICI in 1933?Which term does IUPAC recommend in place of the deprecated addition polymerisation?Which plastic is the most commonly produced in the world?Polyethylene was first made by accident in 1898 by which German chemist?LDPE is created by which type of polymerisation?What density threshold defines HDPE?Which form of polyethylene is typically used for milk jugs and water pipes?Which synthetic polymer is third in world production after polyethylene and polypropylene?PVC is made by polymerising which monomer?About what share of PVC production uses suspension polymerisation?PVC belongs to which category of polymer?What do plasticizers do when added to PVC?Rigid PVC is commonly used in construction for which items?Why must a heat stabilizer be added to PVC during processing?Which plastic was the first synthetic thermosetting plastic produced?Bakelite is made by heating phenol with which compound under a catalyst?Leo Baekeland first set out to find a substitute for which natural material?Which property of Bakelite made it prized for electrical insulators?In which year was Baekeland's patent for his phenol-formaldehyde product granted?Nylon was the first commercially successful synthetic polymer of which type?Who synthesised the first nylon, nylon 66, in 1935 at DuPont?Polyamides arise from a carboxylic acid reacting with which kind of compound?Vulcanisation originally meant treating natural rubber with heat and which element?Which British inventor patented sulfur vulcanisation eight weeks before Goodyear did in the US?