Polymers
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This is a short answer type question as classified in NCERT Exemplar
Addition polymers formed by the polymerization of a single monomeric species are known as homopolymers. The above-given polymer is a homopolymer.
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A natural linear polymer of 2-methyl-1, 3-butadiene becomes hard on treatment with sulphur between 373 to 415K and —S—S— bonds are formed between chains. Write the structure of the product of this treatment?
A natural linear polymer of 2-methyl-1, 3-butadiene becomes hard on treatment with sulphur between 373 to 415K and —S—S— bonds are formed between chains. Write the structure of the product of this treatment?
This is a short answer type question as classified in NCERT Exemplar
While manufacturing tyre rubber, 5 % sulfur is used as a crosslinking agent. A natural linear polymer of 2-methyl-1, 3-butadiene becomes hard on treatment with sulfur and forms vulcanised rubber. The structure of the product forme
Upvote Vulcanisation makes rubber ____________
(A) More elastic
(B) Soluble in inorganic solvent
(C) Crystalline
(D) More stiff
Vulcanisation makes rubber ____________
(A) More elastic
(B) Soluble in inorganic solvent
(C) Crystalline
(D) More stiff
This is a multiple choice answer as classified in NCERT Exemplar
Option (A) and (D)
Explanation: Vulcanisation is a process used to improve the physical properties of natural rubber. This method involves heating a mixture of raw rubber, sulphur, and an appropriate additive to temperatures ranging
Upvote Which of the following polymers have vinylic monomer units?
(A) Acrilan
(B) Polystyrene
(C) Nylon
(D) Teflon
Which of the following polymers have vinylic monomer units?
(A) Acrilan
(B) Polystyrene
(C) Nylon
(D) Teflon
This is a multiple choice answer as classified in NCERT Exemplar
Option (A), (B) and (D)
Explanation: Polyacrylonitrile is formed by the addition polymerisation of acrylonitrile in the presence of a peroxide catalyst. Polyacrylonitrile is used as a wool substitute in the manufacture of commercial
Upvote Which of the following polymers can have strong intermolecular forces?
(A) Nylon
(B) Polystyrene
(C) Rubber
(D) Polyesters
Which of the following polymers can have strong intermolecular forces?
(A) Nylon
(B) Polystyrene
(C) Rubber
(D) Polyesters
This is a multiple choice answer as classified in NCERT Exemplar
Option (A) and (D)
Explanation: Polyamides: These polymers with amide linkages are important examples of synthetic fibers and are known as nylons.
Polyesters: These are the polycondensation products of dicarboxylic acids and diols.
Da
Upvote Which of the following are examples of synthetic rubber?
(A) Polychloroprene
(B) Polyacrylonitrile
(C) Buna-N
(D) Cis-polyisoprene
Which of the following are examples of synthetic rubber?
(A) Polychloroprene
(B) Polyacrylonitrile
(C) Buna-N
(D) Cis-polyisoprene
This is a multiple choice answer as classified in NCERT Exemplar
Option (A) and (C)
Explanation: Synthetic rubbers are either homopolymers or copolymers of 1,3-butadiene or its derivatives with another unsaturated monomer. Polychloroprene or neoprene and Buna-N are examples of synthetic rubber.
Upvote Which of the following monomers form biodegradable polymers?
(A) 3-hydroxybutanoic acid+ 3-hydroxypentanoic acid
(B) Glycine+Aminocaproic acid
(C) Ethylene glycol + Phtahlic acid
(D) Caprolactum
Which of the following monomers form biodegradable polymers?
(A) 3-hydroxybutanoic acid+ 3-hydroxypentanoic acid
(B) Glycine+Aminocaproic acid
(C) Ethylene glycol + Phtahlic acid
(D) Caprolactum
This is a multiple choice answer as classified in NCERT Exemplar
Option (A) and (B)
Explanation: The polymers that are not harmful to the environment are biodegradable polymers. PHBV (Poly beta-hydroxybutyrate co-beta-hydroxy valerate) is a biodegradable polymer. It undergoes bacterial degradatio
Upvote Which of the following polymers are condensation polymers?
(A) Bakelite
(B) Teflon
(C) Butyl rubber
(D) Melamine formaldehyde resin
Which of the following polymers are condensation polymers?
(A) Bakelite
(B) Teflon
(C) Butyl rubber
(D) Melamine formaldehyde resin
This is a multiple choice answer as classified in NCERT Exemplar
Option (A) and (D)
Explanation: Condensation polymers are formed by the addition of more than one monomeric unit. Bakelite and Melamine formaldehyde resin are condensation polymers. Bakelite is a polymer formed from phenol and forma
Upvote Which of the following are addition polymers?
(A) Nylon
(B) Melamine formaldehyde resin
(C) Orlon
(D) Polystyrene
Which of the following are addition polymers?
(A) Nylon
(B) Melamine formaldehyde resin
(C) Orlon
(D) Polystyrene
This is a multiple choice answer as classified in NCERT Exemplar
Option (A) and (D)
Explanation: The formation of addition polymers is accomplished through the repeated addition of monomer molecules with double or triple bonds, such as polythene from ethene and polypropene from propene. Homopolym
Upvote Which of the following polymers are used as fiber?
(A) Polytetrafluoroethane
(B) Polychloroprene
(C) Nylon
(D) Terylene
Which of the following polymers are used as fiber?
(A) Polytetrafluoroethane
(B) Polychloroprene
(C) Nylon
(D) Terylene
This is a multiple choice answer as classified in NCERT Exemplar
Option (C) and (D)
Explanation: Fibers are thread-forming solids. They possess high tensile strength and high modulus. They have strong intermolecular forces of attraction like hydrogen bonding. Nylon and Terylene are used as fibers
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