MCQOPTIONS
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MCQOPTIONS
This section includes 607 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids ? |
| A. | Starch |
| B. | Cellulose |
| C. | Proteins |
| D. | Nucleic acids |
| Answer» D. Nucleic acids | |
| 452. |
Zeigler process |
| A. | produces high density polythene. |
| B. | uses no catalyst. |
| C. | produces low density polythene. |
| D. | employs very high pressure. |
| Answer» B. uses no catalyst. | |
| 453. |
Terylene is |
| A. | same as dacron |
| B. | a polyester |
| C. | both(a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 454. |
Paper like thin plastic articles can be produced by |
| A. | blow moulding |
| B. | vacuum thermo forming |
| C. | injection moulding |
| D. | none of these |
| Answer» C. injection moulding | |
| 455. |
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 molecul ar weight polymers on dissolving gives solution of very low viscosity. |
| Answer» E. | |
| 456. |
Tyres are made by |
| A. | injection moulding |
| B. | extrusion |
| C. | rotational moulding |
| D. | compression moulding |
| Answer» D. compression moulding | |
| 457. |
Condensation polymerisation of __________ produces bakelite. |
| A. | propylene |
| B. | phenol & formaldehyde |
| C. | phenol & acetaldehyde |
| D. | urea & formaldehyde |
| Answer» C. phenol & acetaldehyde | |
| 458. |
Which of the following types of polymers has the strongest inter particle forces ? |
| A. | Elastomers |
| B. | Fibres |
| C. | Thermoplastics |
| D. | Thermosetting polymers |
| Answer» E. | |
| 459. |
Which of the following additives are added to plastics to make it impervious to X-rays ? |
| A. | Asbestos |
| B. | Barium salt |
| C. | Carborundum |
| D. | Phthalic acid |
| Answer» C. Carborundum | |
| 460. |
Vulcanisation of rubber does not increase its |
| A. | elasticity |
| B. | plasticity |
| C. | ductility |
| D. | none of these |
| Answer» C. ductility | |
| 461. |
Polyurathane can not be used for making |
| A. | mattresses & foam |
| B. | coating material |
| C. | adhesives |
| D. | bottles |
| Answer» E. | |
| 462. |
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces |
| A. | epoxy resin |
| B. | polyamide |
| C. | alkyd resin |
| D. | phenolic resin |
| Answer» D. phenolic resin | |
| 463. |
Which of the following is stretched into fibres ? |
| A. | Saturated polyester |
| B. | Unsaturated polyester |
| C. | Isoprene |
| D. | Bakelite |
| Answer» B. Unsaturated polyester | |
| 464. |
Which of the following polymers is used for making a non stick coating on frying pans ? |
| A. | Bakelite |
| B. | Teflon |
| C. | Perspex |
| D. | PVC |
| Answer» C. Perspex | |
| 465. |
Which of the following is not a natural fibre? |
| A. | Silk |
| B. | Viscose rayon |
| C. | Wool |
| D. | Cotton |
| Answer» C. Wool | |
| 466. |
Viscosity of a polymer solution or melt |
| A. | decreases with increase in molecular weight. |
| B. | decreases with increase in temperature. |
| C. | increases with increase in temperature. |
| D. | does not vary with temperature rise. |
| Answer» D. does not vary with temperature rise. | |
| 467. |
Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties. |
| A. | thermoplastic |
| B. | thermosetting |
| C. | elastometric |
| D. | brittleness |
| Answer» D. brittleness | |
| 468. |
The repeating units of PTFE are |
| A. | Cl2CH-CH3 |
| B. | F2 C = CF2 |
| C. | F3 C-CF3 |
| D. | FClC = CF2 |
| Answer» C. F3 C-CF3 | |
| 469. |
Hot drink (e.g, tea) cups are usually made of |
| A. | polystyrene |
| B. | polythene |
| C. | polypropylene |
| D. | PVC |
| Answer» B. polythene | |
| 470. |
Styrene which is a monomer for the production of polystyrene, is commercially produced by the |
| A. | catalytic dehydrogenation of ethyl benzene. |
| B. | dehydration of ethyl alcohol followed by hydrogenation. |
| C. | reacting ethylene oxide with acetal-dehyde. |
| D. | fermentation of starch. |
| Answer» B. dehydration of ethyl alcohol followed by hydrogenation. | |
| 471. |
__________ fibres are made of polyamides. |
| A. | Dacron |
| B. | Nylon |
| C. | Rayon |
| D. | Orion |
| Answer» C. Rayon | |
| 472. |
Neoprene is rendered non-inflammable, because of |
| A. | its cross-linked structure. |
| B. | its linear chain structure. |
| C. | the presence of chlorine atoms in its monomer. |
| D. | the absence of chlorine atoms in its monomer. |
| Answer» D. the absence of chlorine atoms in its monomer. | |
| 473. |
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ? |
| A. | Ethylene glycol |
| B. | Stearic acid estors |
| C. | Tricresyl phosphate |
| D. | Esters of phthalic acid |
| Answer» B. Stearic acid estors | |
| 474. |
Polycondensation reaction of polymerisation |
| A. | does not produce linear polymers. |
| B. | produces only thermoplastic material. |
| C. | produces epoxy polymers. |
| D. | does not need any catalyst. |
| Answer» D. does not need any catalyst. | |
| 475. |
Condensation polymerisation of caprolac-tum 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 |
| Answer» E. | |
| 476. |
The physical state in which polymers exist is |
| A. | melts & rubber like state. |
| B. | amorphous glassy state. |
| C. | partially crystalline state. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 477. |
Polycaprolactum is also known as |
| A. | nylon-66 |
| B. | nylon-6 |
| C. | teflon |
| D. | SBR |
| Answer» C. teflon | |
| 478. |
Phenol formaldehyde is produced by condensation polymerisation. It is also known as |
| A. | teflon |
| B. | bakelite |
| C. | polyester |
| D. | nylon-66 |
| Answer» C. polyester | |
| 479. |
Epoxy resin is a polymer containing two or more groups called epoxide group or ethoxyline group. It is a |
| A. | polyamide & an elastomer. |
| B. | good adhesive. |
| C. | surface coating agent. |
| D. | both (b) and (c). |
| Answer» E. | |
| 480. |
Cation exchange resins used in water treatment is made from __________ resin. |
| A. | urea formaldehyde |
| B. | epoxy |
| C. | amino |
| D. | phenolic |
| Answer» B. epoxy | |
| 481. |
Perspex can be used as a substitute of glass. Its monomer is |
| A. | methyl methacrylate |
| B. | DMT |
| C. | butadiene |
| D. | tetrafluroethylene |
| Answer» B. DMT | |
| 482. |
Polyvinyl acetate is never used for making |
| A. | moulded articles |
| B. | fibres |
| C. | adhesives |
| D. | all (a), (b) & (c) |
| Answer» B. fibres | |
| 483. |
Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer. |
| A. | thermoplastic |
| B. | thermosetting |
| C. | linear |
| D. | glass like transparent |
| Answer» C. linear | |
| 484. |
Thermocole (expanded polystyrene) is not used for |
| A. | low temperature thermal insulation as in refrigerator and air conditioners. |
| B. | accoustic control and ceiling for building. |
| C. | high temperature thermal insulation in furnaces. |
| D. | packing of delicate electronic gadgets. |
| Answer» D. packing of delicate electronic gadgets. | |
| 485. |
The monomer of natural rubber is |
| A. | DMT |
| B. | isoprene |
| C. | 2 methyl-1-propene |
| D. | both (b) and (c) |
| Answer» E. | |
| 486. |
Unbreakable crockeries are made from __________ polymers. |
| A. | polystyrene |
| B. | melamine |
| C. | polystyrene |
| D. | polyurathane |
| Answer» C. polystyrene | |
| 487. |
Polycaprolactum is |
| A. | nylon-6 |
| B. | nylon-66 |
| C. | dacron |
| D. | rayon |
| Answer» B. nylon-66 | |
| 488. |
Maximum consumption of polymers is in |
| A. | electrical insulation |
| B. | toys making |
| C. | coating and films |
| D. | packaging |
| Answer» D. packaging | |
| 489. |
Synthetic polymer produced by using terephthalic acid and ethylene glycol is |
| A. | terylene |
| B. | nylon-66 |
| C. | PVC |
| D. | polyesterene |
| Answer» B. nylon-66 | |
| 490. |
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 |
| Answer» D. melamine formaldehyde | |
| 491. |
Condensation polymerisation is not involved in the manufacture of |
| A. | teflon |
| B. | polythene |
| C. | terylene |
| D. | nylon |
| Answer» C. terylene | |
| 492. |
Rain coats are made of |
| A. | neoprene |
| B. | PVC |
| C. | polyurathane |
| D. | SBR |
| Answer» C. polyurathane | |
| 493. |
Flexible foam (for mattresses) are usually made of |
| A. | PVC |
| B. | silicone rubber |
| C. | polyurethanes |
| D. | polyamides |
| Answer» D. polyamides | |
| 494. |
__________ practically possess no elasticity. |
| A. | Vulcanite or ebonite |
| B. | Spandex fibre |
| C. | Polysulphide rubber |
| D. | Epoxy resin |
| Answer» B. Spandex fibre | |
| 495. |
Linear polymers are normally |
| A. | thermosetting. |
| B. | thermosplastic. |
| C. | elastometric. |
| D. | having extremely high softening point. |
| Answer» C. elastometric. | |
| 496. |
Thermosetting plastic materials |
| A. | can be repeatedly melted. |
| B. | is useful for melt casting. |
| C. | can not be melted after forming. |
| D. | is useful for spinning. |
| Answer» D. is useful for spinning. | |
| 497. |
__________ tubes are good substitude for human blood vessels onrheart by-pass operation. |
| A. | PVC |
| B. | Polythene |
| C. | Teflon/dacron |
| D. | Polystyrene |
| Answer» D. Polystyrene | |
| 498. |
Transistor parts and refrigerator components are normally made of |
| A. | polystyrene |
| B. | polyester |
| C. | high density polythene |
| D. | polyurathane |
| Answer» B. polyester | |
| 499. |
Which of the following polymers has the tendency of decomposing before melting ? |
| A. | Polystyrene |
| B. | Nylon |
| C. | PVC |
| D. | None of these |
| Answer» D. None of these | |
| 500. |
Poly tetra flouro ethylene (PTFE) is known as |
| A. | dacron |
| B. | teflon |
| C. | bakelite |
| D. | celluloid |
| Answer» C. bakelite | |