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 : 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 : Write the name of neoprene polymer?
Last Answer : Ans: Chloroprene
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 : Write the polymer of Tetrafluoro ethane.
Last Answer : Ans: Teflon.
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 Synthetic polymer ? Give one example.
Last Answer : Ans: Man made polymers are called Synthetic polymers. Polyethene, PVC.
Description : Write the monomer of Glyptal polymer.
Last Answer : Ans: (a) Ethylene glycol (b) Phthalic acid
Description : Write the polymer of phenol and formaldehyde that is used for making combs.
Last Answer : Ans: Bakelite, (a) Phenol (b) Formaldehyde
Description : Arrange the following polymer in increasing order of their molecular forces : (a) nylon-6, 6, Buna-S, polythene. (b) nylon-6, Neoprene, polyvinyl chloride.
Last Answer : Ans. (a) Buna S < Polythene < Nylon-6, 6. (b) Neoprene < Polyvinyl Chloride < Nylon-6.
Description : Which polymer is used in making electrical goods and why ?
Last Answer : Ans. Bakelite because of its electrical insulator property.
Description : Name the polymer used for making medicinal Capsule.
Last Answer : Ans. PHBVUC Polyhydroxy butyrate-CO- -hydroxy valerated.
Description : Which artificial polymer is present in bubble gum or chewing gum ?
Last Answer : Ans. Bubble gum or chewing gum contains synthetic Styrene-butadiene rubber.
Description : What is Bio-degradable polymer?
Last Answer : A. The polymers which can be degraded by microbes. e.g. PHBV and Nylon-2 ,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.
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 : Explain the difference between Buna— S and Buna — N.
Last Answer : Ans. Buna — N is a copolymer of 1, 3-butadiene and acrylo nitrile, Buna — S is a copolymer of 1, 3-butadiene and styrene.
Description : The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct? - HN - CH - CO - NH - CH - CO - NH - CH - CO - ... -terminal amino acid and D is N-terminal amino acid. (d) A is a sulphur containing amino acid methionine.
Last Answer : (a) D is the acidic amino acid-glutamic acid.
Description : Which of the following terms best describes the compound below? CH3(CH2)7CH=CH(CH2)7CO2H (a) an unsaturated fatty acid (b) a triglyceride (c) a synthetic detergent (d) a micelle
Last Answer : an unsaturated fatty acid
Description : Compound (A) reacts with sodium metal to form one mole of H2. The compound (A) can be (a) CH3CH2CH=CH2 (b) HOCH2CH2CH2CH2OH (c) CH=CH–CH=CH2 (d) CH3CH2CH2CH2OH
Last Answer : HOCH2CH2CH2CH2OH
Description : Which of the following compounds would react most rapidly in an SN2 reaction? (a) CH3CH2I (b) CH2=CH–I (c) (CH3)2CHI (d) (CH3)3CI
Last Answer : CH3CH2I
Description : How many σ (sigma) bonds are there in CH2=CH—CH=CH2? (a) 3 (b) 6 (c) 9 (d) 12
Last Answer : 9
Description : Compound in which carbons use only sp3 hybrid orbitals for bond formation is (a) CH3CH2CH3 (b) CH3C≡CH (c) CH3CH=CH2 (d) CH2=CH—CH=CH2
Last Answer : CH3CH2CH3
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 : 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 : Write the structure of monomer of polystyrene.
Last Answer : Ans: Styrene. Ar— CH=CH2
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 : What are carbon fiber?
Last Answer : Ans: A long thread solid posses high tensile strength. Eg. Terrylen and Nylon
Description : Write the name of reagent use for initating a free radical chain reaction.
Last Answer : Ans: Tertiary Butyle peroxaide.
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 : 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 : 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
Description : Write the name of monomers of Melamine-Formaldehyde.
Last Answer : Ans: Melamine and Formaldehyde.
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 : 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)