In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres. (A) Polythene (B) PVC (C) Rayon (D) Polyvinyl acetate

In case of dry spinning of polymers, the polymer solution in a volatile
solvent is forced through the spinnerates into a warm air chamber, where
the solvent evaporates leaving behind the polymer in the filament form. Dry
spinning is used for __________ fibres.
(A) Polythene
(B) PVC
(C) Rayon
(D) Polyvinyl acetate
by

1 Answer

Answer :

(B) PVC
by

Related questions

In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres. (A) Viscose rayon (B) Acrylic (C) Polyvinyl acetate (D) Saturated polyeste

Description : In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres. (A) Viscose rayon (B) Acrylic (C) Polyvinyl acetate (D) Saturated polyeste

Last Answer : (D) Saturated polyeste

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 polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres. (A) Acrylic (B) Polyester (C) Nylon 6:6 (D) Polypropylene

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

Vinyl flooring is done using __________ sheets. (A) Polypropylene (B) PVC (C) Polythene (D) Polyvinyl acetate

Description : Vinyl flooring is done using __________ sheets. (A) Polypropylene (B) PVC (C) Polythene (D) Polyvinyl acetate

Last Answer : (B) PVC

Pick out the wrong statement. (A) Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre (B) Crimp is a measure of the difference between the length of the straightened and unstraightened fibre (C) Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning (D) Nylon fibres have greater water absorption capacity than polyester fibres

Description : Pick out the wrong statement. (A) Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre (B) ... fibres are all prepared by wet spinning (D) Nylon fibres have greater water absorption capacity than polyester fibres

Last Answer : (C) Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning

The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is(A) Polyvinyl alcohol(B) Polyvinyl acetate(C) Polyvinyl butyral(D) PVC

Description : The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is (A) Polyvinyl alcohol (B) Polyvinyl acetate (C) Polyvinyl butyral (D) PVC

Last Answer : (C) Polyvinyl butyral

Polyvinyl acetate is never used for making (A) Moulded articles (B) Fibres (C) Adhesives

Description : Polyvinyl acetate is never used for making (A) Moulded articles (B) Fibres (C) Adhesives

Last Answer : (A) Moulded articles

Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents (C) Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity

Description : Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more ... of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity

Last Answer : (D) High molecular weight polymers on dissolving gives solution of very low viscosity

Automobile steering wheels are normally made of (A) Cellulose acetate(B) Cellulose nitrate(C) PVC(D) High density polythene

Description : Automobile steering wheels are normally made of (A) Cellulose acetate (B) Cellulose nitrate (C) PVC (D) High density polythene

Last Answer : (A) Cellulose acetate

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 : 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

Last Answer : (B) Polythene

Arrange the following polymer in increasing order of their molecular forces : (a) nylon-6, 6, Buna-S, polythene. (b) nylon-6, Neoprene, polyvinyl chloride.

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.

Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Description : Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Last Answer : (A) Polymeric fibres are never produced by addition polymerisation

Arrange the following Polymers in increasing order of inter molecular forces. (a) Nylon 66, Buna-S and Polythene (b) Nylon 6, Neoprene and PVC

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.

Which of the following is not a thermoplastic material? (A) Epoxy polymer (B) PVC (C) Polystyrene (D) Polythene

Description : Which of the following is not a thermoplastic material? (A) Epoxy polymer (B) PVC (C) Polystyrene (D) Polythene

Last Answer : (A) Epoxy polymer

Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land? [CSAT 2011] (a) It greatly increases the crop production (b) It makes some soils impermeable (c) It raises the water table (d) It fills the air spaces in the soil with water

Description : Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land? [CSAT 2011] (a) It greatly increases ... c) It raises the water table (d) It fills the air spaces in the soil with water

Last Answer : Ans: (b)

Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land? a. It greatly increases the crop production b. It may lead to crop yield loss c. It raises the water table d. It fills the air spaces in the soil with water

Description : Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land? a. It greatly increases the crop ... c. It raises the water table d. It fills the air spaces in the soil with water

Last Answer : b. It may lead to crop yield loss

Which of the following statements is false about cellulose? (a) It is a polymer of glucose molecules joined in β-1,4 linkages. (b) It is a major component of cotton. (c) It is used in the manufacture of Dacron fibres. (d) It is used in the manufacture of Rayon fibres

Description : Which of the following statements is false about cellulose? (a) It is a polymer of glucose molecules joined in β-1,4 linkages. (b) It is a major component of cotton. (c) It is used in the manufacture of Dacron fibres. (d) It is used in the manufacture of Rayon fibres

Last Answer : It is used in the manufacture of Dacron fibres.

Classify the polymers as addition and condensation polymer— Nylon 6, Neoprene and PVC.

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.

__________ is a thermosetting plastic. (A) Polyvinyl chloride (B) Polythene (C) Bakelite (D) Teflon

Description : __________ is a thermosetting plastic. (A) Polyvinyl chloride (B) Polythene (C) Bakelite (D) Teflon

Last Answer : (C) Bakelite

Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation(A) PVC(B) Bakelite(C) PTFE(D) Epoxy resin

Description : Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation (A) PVC (B) Bakelite (C) PTFE (D) Epoxy resin

Last Answer : (A) PVC

__________ fibres are made of polyamides. (A) Dacron (B) Nylon (C) Rayon (D) Orion

Description : __________ fibres are made of polyamides. (A) Dacron (B) Nylon (C) Rayon (D) Orion

Last Answer : (B) Nylon

The synthetic fibres produced from __________ are known as rayon. (A) Lignin (B) Cellulose (C) Polyamides (D) Ethylene glyco

Description : The synthetic fibres produced from __________ are known as rayon. (A) Lignin (B) Cellulose (C) Polyamides (D) Ethylene glyco

Last Answer : (B) Cellulose

The non-stick coating on pan and other cooking utensils is made from __________. a) rayon b)Teflon c)melamine d)PVC

Description : The non-stick coating on pan and other cooking utensils is made from __________. a) rayon b)Teflon c)melamine d)PVC

Last Answer : b)Teflon

__________ is a thermosetting plastic. (A) PVC (B) Polythene (C) Bakelite (D) Polystyrene

Description : __________ is a thermosetting plastic. (A) PVC (B) Polythene (C) Bakelite (D) Polystyrene

Last Answer : (C) Bakelite

__________ tubes are good substitute for human blood vessels on heart by-pass operation. (A) PVC (B) Polythene (C) Teflon/Dacron (D) Polystyrene

Description : __________ tubes are good substitute for human blood vessels on heart by-pass operation. (A) PVC (B) Polythene (C) Teflon/Dacron (D) Polystyrene

Last Answer : (C) Teflon/Dacron

Polyvinyl chloride (PVC) (A) Is produced by Polycondensation reaction (B) Uses either emulsion or suspension polymerisation methods (C) Can be made thermosetting by adding a plasticiser (D) Softening temperature is 200°C

Description : Polyvinyl chloride (PVC) (A) Is produced by Polycondensation reaction (B) Uses either emulsion or suspension polymerisation methods (C) Can be made thermosetting by adding a plasticiser (D) Softening temperature is 200°C

Last Answer : (B) Uses either emulsion or suspension polymerisation methods

. Polyvinyl chloride (PVC) is (A) A thermosetting material (B) A condensation polymerisation product (C) Made by employing emulsion polymerisation (D) None of these

Description : . Polyvinyl chloride (PVC) is (A) A thermosetting material (B) A condensation polymerisation product (C) Made by employing emulsion polymerisation (D) None of these

Last Answer : (C) Made by employing emulsion polymerisation

Reactor used in the production of polyvinyl chloride (PVC) is made of (A) Nickel or glass lined steel (B) Aluminium (C) Tantalum (D) Lead

Description : Reactor used in the production of polyvinyl chloride (PVC) is made of (A) Nickel or glass lined steel (B) Aluminium (C) Tantalum (D) Lead

Last Answer : (A) Nickel or glass lined steel

Bakelite is chemically known as (A) Polyvinyl chloride (PVC) (B) Polybutadiene (C) Phenol formaldehyde (D) Polyurethane

Description : Bakelite is chemically known as (A) Polyvinyl chloride (PVC) (B) Polybutadiene (C) Phenol formaldehyde (D) Polyurethane

Last Answer : (C) Phenol formaldehyde

. Polyvinyl chloride (PVC) is (A) A thermosetting material (B) A condensation polymerisation product (C) Made by employing emulsion polymerisation (D) None of these

Description : . Polyvinyl chloride (PVC) is (A) A thermosetting material (B) A condensation polymerisation product (C) Made by employing emulsion polymerisation (D) None of these

Last Answer : (C) Made by employing emulsion polymerisation

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

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

After long periods of use, a gray spot develops on the inside of a bulb. This is because of: A. The tungsten filament evaporates and collects there B. The heat of the bulb scorches the glass at the top C. Dust inside the bulb condenses on the top D. Glass undergoes a change due to the heat

Description : After long periods of use, a gray spot develops on the inside of a bulb. This is because of: A. The tungsten filament evaporates and collects there B. The heat of the bulb scorches the glass at the top C. Dust inside the bulb condenses on the top D. Glass undergoes a change due to the heat

Last Answer : ANSWER: A

After long periods of use, a grey spot develops on the inside of a bulb. This is because – (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because – (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Last Answer : (3) dust inside the bulb condenses on the top Explanation: At high operating temperatures, tungsten evaporates from the filament and gradually forms a gray film on the inside of the bulb. The inert ... spot develops in the filament. When this happens, the filament will break and the bulb fails.

After long periods of use, a grey spot develops on the inside of a bulb. This is because (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Last Answer : dust inside the bulb condenses on the top

For spinning viscose rayon, the extrusion spinnerettes are made of (A) Platinum or gold alloys (B) High carbon steel (C) Aluminium (D) Nickel

Description : For spinning viscose rayon, the extrusion spinnerettes are made of (A) Platinum or gold alloys (B) High carbon steel (C) Aluminium (D) Nickel

Last Answer : (A) Platinum or gold alloys

Which of the following is used to make light weight, but strong plastic? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Description : Which of the following is used to make light weight, but strong plastic? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Last Answer : (3) Polyvinyl Chloride Explanation: Polyvinyl chloride (PVC) is a common, strong but lightweight plastic that is used in making tough plastic. It is used for flexible applications such ... cables. It is the third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene.

Which of the following is used to make light weight, but strong plastic ? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Description : Which of the following is used to make light weight, but strong plastic ? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Last Answer : Polyvinyl Chloride

Viscose rayon is (A) Cellulose nitrate(B) Regenerated cellulose nitrate(C) Regenerated cellulose acetate(D) None of these

Description : Viscose rayon is (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Regenerated cellulose acetate (D) None of these

Last Answer : (D) None of these

Viscose rayon is chemically (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Cellulose acetate (D) Regenerated cellulose acetate

Description : Viscose rayon is chemically (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Cellulose acetate (D) Regenerated cellulose acetate

Last Answer : (D) Regenerated cellulose acetate

Viscose rayon is (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Regenerated cellulose acetate (D) None of these

Description : Viscose rayon is (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Regenerated cellulose acetate (D) None of these

Last Answer : (D) None of these

__________ is an addition polymer (A) Nylon (B) Bakelite (C) Polythene (D) None of these

Description : __________ is an addition polymer (A) Nylon (B) Bakelite (C) Polythene (D) None of these

Last Answer : (C) Polythene

__________ is a thermosetting plastic. (A) Polythene (B) Epoxy polymer (C) P.V.C. (D) Polystyrene

Description : __________ is a thermosetting plastic. (A) Polythene (B) Epoxy polymer (C) P.V.C. (D) Polystyrene

Last Answer : (B) Epoxy polymer

The term PVC used in the plastic industry stands for - (1) polyvinyl chloride (2) polyvinyl carbonate (3) phosphor vanadium chloride (4) phosphavinyl chloride

Description : The term PVC used in the plastic industry stands for - (1) polyvinyl chloride (2) polyvinyl carbonate (3) phosphor vanadium chloride (4) phosphavinyl chloride

Last Answer : (1) polyvinyl chloride Explanation: Polyvinyl chloride is the world's third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene. About 40 million tones are produced per year.

The term PVC used in the plastic industry stands for-------? A. Phosphavinyl chloride B. Phosphor vanadiu chloride C. Polyvinyl chloride (Answer) D. Polyvinyl carbobate

Description : The term PVC used in the plastic industry stands for-------? A. Phosphavinyl chloride B. Phosphor vanadiu chloride C. Polyvinyl chloride (Answer) D. Polyvinyl carbobate

Last Answer : C. Polyvinyl chloride (Answer)

PVC stands for (a) polyvinyl chloride (b) post varnish conductor (c) pressed and varnished cloth (d) positive voltage conductor (e) none of the above

Description : PVC stands for (a) polyvinyl chloride (b) post varnish conductor (c) pressed and varnished cloth (d) positive voltage conductor (e) none of the above

Last Answer : (a) polyvinyl chloride

Write one application for the give dielectric material. (i) Polyvinyl Carbide(PVC) (ii) Glass (iii) Mica (iv) Cotton and Silk

Description : Write one application for the give dielectric material. (i) Polyvinyl Carbide(PVC) (ii) Glass (iii) Mica (iv) Cotton and Silk

Last Answer : (i) Polyvinyl Carbide(PVC):it is used in insulation of wires and cables in domestic wiring as well as in aircraft and factory wiring (any one)  (ii) Glass: 1) Alkaline glasses are used for ... with wax or varnishes are used in windings of magnet coils and small medium sized mechanics (any one) 

Pick up the non-inflammable plastic from the following: (A) Cellulose acetate plastics (B) Polyvinyl chloride plastics (C) Phenol formaldehyde plastic (D) Urea formaldehyde plastic

Description : Pick up the non-inflammable plastic from the following: (A) Cellulose acetate plastics (B) Polyvinyl chloride plastics (C) Phenol formaldehyde plastic (D) Urea formaldehyde plastic

Last Answer : Answer: Option B

Which one of the following polymers is widely used for making bullet proof material? (1) Polyvinyl chloride (2) Polyamides (3) Polyethylene (4) Polycarbonates

Description : Which one of the following polymers is widely used for making bullet proof material? (1) Polyvinyl chloride (2) Polyamides (3) Polyethylene (4) Polycarbonates

Last Answer : (4) Polycarbonates Explanation: Ballistic nylon was the standard cloth used for bulletproof vests until the 1970s. In 1965, Stephanie Kwolek, a chemist at Du Pont, invented Kevlar, trademark ... terephthalamide, a liquid polymer that can be spun into aramid fiber and woven into cloth.

Which one among the following polymers is used for making bullet-proof material? (1) Polyvinyl chloride (2) Polystyrene (3) Polyethylene (4) Polyamide

Description : Which one among the following polymers is used for making bullet-proof material? (1) Polyvinyl chloride (2) Polystyrene (3) Polyethylene (4) Polyamide

Last Answer : (3) Polyethylene Explanation: A bullet-proof material is made of polyethylene. It is a higher grade of the plastic found in Tupperware.

__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate. (A) Fibrous (B) Leathery (C) Rubbery (D) Hard

Description : __________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate. (A) Fibrous (B) Leathery (C) Rubbery (D) Hard

Last Answer : (B) Leathery