Description : Write the polymer of phenol and formaldehyde that is used for making combs.
Last Answer : Ans: Bakelite, (a) Phenol (b) Formaldehyde
Description : What are monomers of Nylon 6.6
Last Answer : Ans: (a) Hexamethylene diamine and adaipic acid.
Description : Write the structure of monomer of polystyrene.
Last Answer : Ans: Styrene. Ar— CH=CH2
Description : Write the name of reagent use for initating a free radical chain reaction.
Last Answer : Ans: Tertiary Butyle peroxaide.
Description : Write the name of neoprene polymer?
Last Answer : Ans: Chloroprene
Description : Write the polymer of Tetrafluoro ethane.
Last Answer : Ans: Teflon.
Description : Write the monomer of Neoprene?
Last Answer : Ans: Chloroprene.
Description : Write the structure of monomer of Polystyrene?
Last Answer : Ans: Ar CH = CH2
Description : Write the monomer of Polystyrene?
Last Answer : Ans: Styrene.
Description : Write the Mnomers of Buna-s.
Last Answer : Ans. 1, 3 butadine and styrene
Description : Write the monomer of Glyptal polymer.
Last Answer : Ans: (a) Ethylene glycol (b) Phthalic acid
Description : Write the monomer of Polyvinyl chloride.
Last Answer : Ans: Vinyl chloride.
Description : Write an equation for the Chemistry involved when a drop of hydrochloric acid make a hole in nylon stockings.
Last Answer : Ans. The (— CO — NH —) amide bond in nylon gets hydrolysed.
Description : Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the (A) Electrical insulation purpose (B) Tanning of leather (C) Strengthening of plaster of Paris (D) Decorative laminates
Last Answer : (C) Strengthening of plaster of Paris
Description : Which of the following polymers shows the highest anti-tacking properties? (A) Melamine formaldehyde resin (B) Phenolic resin (C) Epoxy resin (D) Alkyd resin
Last Answer : (A) Melamine formaldehyde resin
Description : Which of the following polymers belong to the class of formaldehyde resin? (A) Melamine resins (B) Teflon (C) Dacron (D) None of these
Last Answer : (A) Melamine resins
Description : Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin. (A) Resorcinol (B) Phenol (C) Para-cresol (D) Melamine
Last Answer : (D) Melamine
Description : Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. (A) Epoxy (B) Phenol formaldehyde (C) Urea formaldehyde (D) Melamine formaldehyde
Last Answer : (C) Urea formaldehyde
Description : __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine. (A) Epoxy (B) Amino (C) Alkyd (D) Phenolic
Last Answer : (B) Amino
Description : Pick up the correct statement from the following: (A) Melamine is obtained from calcium carbide (B) Formaldehyde is prepared synthetically from methane (C) The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin (D) All the above
Last Answer : Answer: Option D
Description : Which one of the following polymers is obtained from condensation polymerization? (A) Phenol formaldehyde (B) Carbamide (C) Melamine-formaldehyde (D) All of these
Description : What is PHBV? Give its one use.
Last Answer : Ans: It is a poly β hydroxybutyrate—co β hydroxyl valerate . It is obtain by the copolirisation of 3— hydroxyl butanoic acid and 3— hydroxy pentanoic acid.It is used in speciality packaging , orthopaedic devices.
Description : Who do double bonds in rubber molecules influence there structure and reactivity.
Last Answer : Ans: Greater the number of double bound the rubber will be less reactive because of greater inter molecular forces of attraction among the monomers.
Description : What is Biodegradble polymer?
Last Answer : Ans: The polymers which are Biodegrable and not causes any environmental population is called Biodegrable . Eg. PHBV and Nylon 2 Nylon 6.
Description : Classify the polymers as addition and condensation polymer— Nylon 6, Neoprene and PVC.
Last Answer : Ans: Nylon 6 —Condensation polymer Neoprene and PVC— Addition polymer.
Description : Clasify the polymers as addition and condenstation polymers. Nylon 66, Buna-S, Polythene.
Last Answer : Ans: Nylon 66 condensation polymer. Buna-S and polythene—Addition polymer.
Description : Arrange the following Polymers in increasing order of inter molecular forces Nylon 6, Neoprene and PVC
Last Answer : Ans : Nylon 6, PVC and. Neop
Description : Arrange in increasing order of inter molecular forces. Nylon 66, Buna-S and polyethene.
Last Answer : Ans: Nylon 66 > polyethene> Buna-S
Description : Name the monomer of polyvinylchloride.
Last Answer : Ans: Vinylcloride.
Description : A polymer is used for making paints and lacquers, name it.
Last Answer : Ans: Glyptal.
Description : A polymer is use for making combs, name the polymer.
Last Answer : Ans : Baklite
Description : What are carbon fiber?
Last Answer : Ans: A long thread solid posses high tensile strength. Eg. Terrylen and Nylon
Description : What does stand for PDI
Last Answer : Ans: Polydispersity Index.
Description : Arrange the following Polymers in increasing order of inter molecular forces. (a) Nylon 66, Buna-S and Polythene (b) Nylon 6, Neoprene and PVC
Last Answer : Ans: (a) Buna-S, Polythene and Nylon 66. (b) Neoprene, PVC and Nylon 6.
Description : Explain the difference between Buna-N and Buna-S.
Last Answer : Ans: Buna-N:- 1. It is optained by the copolymerization of 1,3 - butadiene and acrylonitrile in the presence of a Peroxide Cxtalyst. 2. It is resistant to action of Petrol. 3. It is used ... 1. It is obtained by the Copolymerisation of buta diene and styrene. 2. It is used for automobile tyres.
Description : What is PHBV ?
Last Answer : Ans: It is a poly hydroxyl butyrate. Co-β- hydroxyl Valerate. It is copolymer of 3- hydroxyl butanoic acid and 3- hydroxyl pentanoic acid in which monomer units linked by ester linkage.
Description : Why are the numbers 6, 6 and 6 put in the name of Nylon 66 and Nylon 6?
Last Answer : Ans: Nylon 66 means that it is formed by two monomers each containing six carbon atoms. While in Nylon 6 means that it is formed by a monomer containing six carbon atoms.
Description : Distinguish between Homopolymers and Copolymers.
Last Answer : Homopolymers Copolymers 1. The polymers which are form by only one type of monomers Eg. Teflon & PVC 1. The polymers which are form by two or more types of monomers .Eg. Terrylene & Buna-S
Description : Distinguish between thermoplastic and thermo setting polymers.
Last Answer : Thermo plastic polymer Thermo setting plastic 1. The inter moliculer forces are intermediate. 1. The inter molecular force are ... 3. Eg. Polythene and polystyrene 3. Eg. Bakelite
Description : Differntiate between addition polymer and condensation polymer.
Last Answer : Addition Polymer Condensation Polymer 1. Large no. of unsaturated monomers combine together to form polymers Eg. Polythene and ... group with release of small molecule like water combine to form polymers. Eg. Nylon and Teflon
Description : What is meant by PTEE ? Give its popular name.
Last Answer : Ans: Polytetra fluoroethylene. Teflon.
Description : Why should one always use purest monomer in free radical polymerization?
Last Answer : Ans: The impurities present in monomer may combine with free radical that slow the rate of polymerization.
Description : Define Copolymers?
Last Answer : Ans: The polymer is obtained by two or more different monomers.
Description : What is the monomer of Polyacrylonitrile?
Last Answer : Ans: Acrylonitrile
Last Answer : Ans: Buna-N:- 1. It is obtained by the copolymerization of 1,3 - butadiene and acrylonitrile in the presence of a Peroxide Catalyst. 2. It is resistant to action of Petrol. 3. It is used ... 1. It is obtained by the Copolymerisation of buta diene and styrene. 2. It is used for automobile tyres.
Description : Define Synthetic rubbers. Whether it is homopolymer or co-polymer?
Last Answer : Ans: Any Vuclanised rubbers like polymers. Which is getting stretched to about twice lengths and returns to the original shape and size as the external force is released. Eg. Homopolymers.
Description : What is Neoprene? Mention any two uses.
Last Answer : Ans: A synthetic rubber made by chloroprene. It is a synthetic rubbers. Uses: Conveyor belts in coal mines & gaskets.
Description : Define Copolymers.Give two examples.
Last Answer : Ans: The Polymer in which repeating units are combined with two or more differents types of monomers Eg. Polyster and terrylene(Dacron)
Description : What are elastomers ? Give one example.
Last Answer : Ans: The rubber like material which are elastic in nature. Eg. Natural rubber.
Description : Differentiate between thermo plastic and thermo setting Plastic.
Last Answer : Thermo Plastic Polymer Thermo setting Polymer 1. Liner or slightly branched long change molecules 1. Cross linked or ... . Ex. Polythene, Polystyrene 3. Ex. Bakelite, Urea-Formal dehyde resins