Description : Which of the following are addition polymers? I. Polypropylene II. Teflon III. Nylon (a) Only I (b) Only II (c) Only III (d) both I and II
Last Answer : both I and II
Description : Which of the following is an example of a condensation polymer? (a) Nylon-6,6 (b) Teflon (c) Polypropylene (d) Orlon
Last Answer : Nylon-6,6
Description : Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature. (A) Nylon (B) Polyacrylonitrile (C) Polypropylene (D) Polyester
Last Answer : (B) Polyacrylonitrile
Description : Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter ... the __________ fibres. (A) Acrylic (B) Polyester (C) Nylon 6:6 (D) Polypropylene
Last Answer : (A) Acrylic
Description : Which of the following polymers contain nitrogen (a) PVC (b) Teflon (c) Nylon (d) Terylene
Last Answer : Nylon
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 : Pick out the wrong statement. (A) Addition polymers are generally formed by chain growth polymerisation (B) Condensation polymers are generally formed by step growth polymerisation (C) Teflon is formed by step growth polymerisation (D) Bakelite is formed by step growth polymerisation
Last Answer : C) Teflon is formed by step growth polymerisation
Description : __________ is not a condensation polymer. (A) Teflon (B) Nylon-66 (C) Dacron (D) Polystyrene
Last Answer : (A) Teflon
Description : Phenol formaldehyde is produced by condensation polymerisation. It is also known as (A) Teflon (B) Bakelite (C) Polyester (D) Nylon-66
Last Answer : (B) Bakelite
Description : Condensation polymerisation is not involved in the manufacture of (A) Teflon (B) Polythene (C) Terylene (D) Nylon
Last Answer : (B) Polythene
Description : Nylon is made up of : (1) Polyamide (2) Polyester (3) Polyethylene (4) Polypropylene
Last Answer : (1) Polyamide Explanation: Nylon is a generic designation for a family of synthetic polymers known generically as aliphatic polyamides. It is one of the most commonly used polymers.
Last Answer : Polyamide
Description : Identify the group in which all the polymers mentioned can be used to make fibres. (A) Butadiene copolymers, Polyamides, Urea-formaldehyde (B) Cellulose derivatives, Polyisoprene, Polyethylene (C) Cellulose derivatives, Polyamides, Polyurethane (D) Polypropylene, Poly vinyl chloride, Silicon
Last Answer : (B) Cellulose derivatives, Polyisoprene, Polyethylene
Description : 38. Which of the following statements is false? (1) Both starch and cellulose are polymers of glucose (2) Artificial silk is derived from cellulose (3) Nylon-66 is an example of elastomer (4) The repeat unit in natural rubber is isoprene
Last Answer : Nylon-66 is an example of elastomer
Description : __________ is a copolymer. (A) Nylon-66 (B) Polypropylene (C) PVC
Last Answer : (A) Nylon-66
Description : Ethylene glycol reacts with dimethyl terephthalate to form (a) Nylon-6,6 (b) Teflon (c) Dacron (d) Orlon
Last Answer : Dacron
Description : Which of the following is a thermosetting polymer? (a) Bakelite (b) Nylon-6,6 (c) Polyethylene (d) Teflon
Last Answer : Bakelite
Description : In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is (A) Terylene (B) Polybutadiene (C) PVC (D) Polypropylene
Last Answer : (A) Terylene
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 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 : Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2 . Which of the following polymers has the maximum film elongation (of the order of 100%)? (A) Water impermeable cellophane (B) Polythene (C) Cellulose acetate (D) Teflon
Description : Which of the following polymers is used for making a non stick coatingon frying pans? (A) Bakelite (B) Teflon (C) Perspex (D) PVC
Last Answer : (B) Teflon
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 : The polymer obtained by the condensation of hexamethylene diamine and adipic acid is – (1) Nylon 66 (2) Terylene (3) Tollen's (4) Bakelite
Last Answer : (1) Nylon 66 Explanation: Polymers are very high molecular mass substances each molecule of which consists of very large number of simple structural units joined together though covalent bonds ... the repeating structural unit is derived from two monomer units - hexamethylenediamine and adipic acid.
Description : The polymer obtained by the condensation of hexamethylene diamine and adipic acid is : (1) Nylon 66 (2) Terylene (3) Tollen’s (4) Bakelite
Last Answer : Nylon 66
Description : Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is (A) Nylon-66 (B) Teflon (C) Polyester (D) Bakelite
Description : Polycaprolactam is also known as (A) Nylon-66 (B) Nylon-6 (C) Teflon (D) SBR
Last Answer : (B) Nylon-6
Description : Poly-methyl-methacrylate (PMMA) is known as (A) Bakelite (B) Teflon (C) Perspex (D) Nylon-6
Last Answer : (C) Perspex
Description : Polymethyl methacrylate (PMMA) is known as (A) Bakelite (B) Teflon (C) Perspex (D) Nylon-6
Description : P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as (A) Bakelite (B) Neoprene (C) Teflon (D) Nylon-66
Last Answer : (C) Teflon
Description : Which of the following polymers has the tendency of decomposing before melting? (A) Polystyrene (B) Nylon (C) PVC (D) None of these
Last Answer : (C) PVC
Description : Which one of the following polymers is obtained from condensation polymerization? (A) Phenol formaldehyde (B) Carbamide (C) Melamine-formaldehyde (D) All of these
Last Answer : Answer: Option D
Description : Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ °C for producing nylon- 6. (A) -20 to 25 (B) 50 to 75 (C) 100 to 150 (D) 250-280
Last Answer : (D) 250-280
Description : Polycaprolactam (Nylon - 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about __________ percent. (A) 50 (B) 75 (C) 90 (D) 99
Last Answer : (C) 90
Description : 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C. (A) -5 (B) 10-30 (C) 250-280 (D) 500-600
Last Answer : (C) 250-280
Description : 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C. (A) < 0 (B) 10-30 (C) 250-280 (D) 500-600
Last Answer : (B) 10-30
Description : Which of the following is the correct sequence of events in the origin of life? I. Formation of protobionts II. Synthesis of organic monomers III. Synthesis of organic polymers IV. Formation of DNA-based genetic systems (a) I, II, III, IV (b) I, III, II, IV (c) II, III, I, IV (d) II, III, IV, I
Last Answer : c) II, III, I, IV
Description : Marginal leakage at the proximal gingival cavosurface of a recently restored class II can be caused by: I. Insufficient condensation II. First proximal increment was too large III. Neglecting to wedge the matrix IV. Hand ... III, IV C. I, II, V D. None of the above E. All of the above
Last Answer : C. I, II, V
Description : Which of following statements is false about propane? (a) all bond angles are 109.5° (b) each carbon is sp3 hybridized (c) the compound is combustible (d) the compound undergoes polymerization to give polypropylene.
Last Answer : the compound undergoes polymerization to give polypropylene.
Description : Polypropylene is preferred to polythene, because the former is (A) Non-inflammable (B) Harder (C) Stronger (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C
Description : Is polypropylene biodegradable?
Last Answer : Polypropylene can be biodegradable if it is made with EBD(enhanced bio decompositions) which can be easily broken down,fairly quickly, back to base compounds. A variety of packaging cannow use biodegradable polypropylene.
Description : What is the difference between polypropylene and PVC?
Last Answer : PVC is the most common plastic used in book covering materials, and has been used for many years. Polypropylene has become more common recently. Both of these plastics have different handling characteristics. PVC is ... plastic. PVC is known to have a low level of acidity. PVC is cheaper than PP.
Description : __________ is normally used for the manufacture of refrigerator components and transistor parts. (A) Polypropylene (B) Polystyrene (C) Polyester (D) Polyurethane
Last Answer : (B) Polystyrene
Description : Commercial production of polypropylene employs __________ polymerisation. (A) Emulsion (B) Suspension (C) Solution (D) Bulk
Last Answer : (C) Solution
Description : Which of the following is a copolymer? (A) Polystyrene (B) SBR (C) PTFE (D) Polypropylene
Last Answer : (B) SBR
Description : Benzoyl chloride is not used as a catalyst in the manufacture of (A) Polystyrene (B) Polyvinyl acetate (C) Polypropylene (D) Polyvinyl chloride-co-vinyl acetate
Last Answer : (C) Polypropylene
Description : Hot drink (e.g., tea) cups are usually made of (A) Polystyrene (B) Polythene (C) Polypropylene (D) PVC
Last Answer : (A) Polystyrene
Description : Vinyl flooring is done using __________ sheets. (A) Polypropylene (B) PVC (C) Polythene (D) Polyvinyl acetate
Last Answer : (B) PVC