MCQOPTIONS
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MCQOPTIONS
This section includes 568 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
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 | |
| 252. |
Polystyrene is a light, transparent, thermoplastic material used for making |
| A. | toys and combs |
| B. | packaging bags |
| C. | non-sticking utensils |
| D. | electrical insulation |
| Answer» B. packaging bags | |
| 253. |
Firing temperature is minimum (1250-1400 °C) for __________ bricks. |
| A. | fireclay |
| B. | direct bonded basic |
| C. | silica |
| D. | magnesite |
| Answer» B. direct bonded basic | |
| 254. |
Styrene butadiene rubber (SBR) as compared to natural rubber has |
| A. | poor tensile strength. |
| B. | poorer resistance. |
| C. | greater amount of heat build up heavy loading. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 255. |
Polymerisation product of C₂F₄ (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called |
| A. | polyurethane |
| B. | silicone rubber |
| C. | teflon |
| D. | epoxy resin |
| Answer» D. epoxy resin | |
| 256. |
Amino resins are used in paper treatment to improve its |
| A. | wet tear and bursting strength. |
| B. | folding endurance |
| C. | wet rub resistance |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 257. |
Caprolactum, a raw material for the manufacture of nylon-6, is produced from |
| A. | phenol |
| B. | naphthalene |
| C. | benzene |
| D. | pyridine |
| Answer» D. pyridine | |
| 258. |
__________ scrap can be recycled & reutilised. |
| A. | Bakelite |
| B. | Epoxy resin |
| C. | Polythene |
| D. | none of these |
| Answer» D. none of these | |
| 259. |
__________ is not a condensation polymer. |
| A. | Teflon |
| B. | Nylon-66 |
| C. | Dacron |
| D. | Polystyrene |
| Answer» B. Nylon-66 | |
| 260. |
The main use of butadiene is |
| A. | as a plasticiser for unsaturated polyester. |
| B. | in the manufacture of synthetic rubber. |
| C. | as an anti-skimming agent in paint. |
| D. | none of these. |
| Answer» C. as an anti-skimming agent in paint. | |
| 261. |
Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin. |
| A. | resorcinol |
| B. | phenol |
| C. | para-cresol |
| D. | melamine |
| Answer» E. | |
| 262. |
Thermosetting resins/polymers as compared to thermoplastic ones are |
| A. | soluble in all organic solvents. |
| B. | more brittle. |
| C. | formed by addition polymerisation only. |
| D. | easily reshaped & reused. |
| Answer» C. formed by addition polymerisation only. | |
| 263. |
Which is the stable form of silica upto 1470°C ? |
| A. | Quartz |
| B. | Cristobalite |
| C. | Tridymite |
| D. | None of these |
| Answer» D. None of these | |
| 264. |
The starting material used for the manufacture of caprolactum is |
| A. | ethyl benzene |
| B. | cyclohexane |
| C. | ethylene glycol |
| D. | DMT |
| Answer» C. ethylene glycol | |
| 265. |
Cation exchange resins used in water treatment is made from __________ resin. |
| A. | urea formaldehyde |
| B. | epoxy |
| C. | amino |
| D. | phenolic |
| Answer» B. epoxy | |
| 266. |
Polyurathane can not be used to make |
| A. | automobile cushion |
| B. | thermal insulation in refrigerator |
| C. | coating and adhesive |
| D. | fibre reinforced plastic (FRP) |
| Answer» E. | |
| 267. |
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate. |
| A. | Fibrous |
| B. | Leathery |
| C. | Rubbery |
| D. | Hard |
| Answer» C. Rubbery | |
| 268. |
Which of the following is a copolymer ? |
| A. | PVC |
| B. | Bakelite |
| C. | Polythene |
| D. | Teflon |
| Answer» C. Polythene | |
| 269. |
Dacron (or terylene) fibres as compared to nylon fibres have |
| A. | better heat & acid resistant properties. |
| B. | poorer resistance to alkalis. |
| C. | poorer dyeability. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 270. |
Which of the following is not a polyolefin ? |
| A. | Polystyrene |
| B. | Polypropylene |
| C. | Neoprene |
| D. | None of these |
| Answer» D. None of these | |
| 271. |
Thermal pyrolysis of ethylene dichloride produces |
| A. | trichlorethylene |
| B. | vinyl chloride |
| C. | ethanol amine |
| D. | ethylene oxide |
| Answer» C. ethanol amine | |
| 272. |
Polyhexamethylene adipimide is also known as |
| A. | bakelite |
| B. | nylon-66 |
| C. | epoxy resin |
| D. | silicone rubber |
| Answer» C. epoxy resin | |
| 273. |
Most commonly used rubber vulcanisation agent is |
| A. | sulphur |
| B. | bromine |
| C. | platinum |
| D. | alumina |
| Answer» B. bromine | |
| 274. |
Polycaprolactum is also known as |
| A. | nylon-66 |
| B. | nylon-6 |
| C. | teflon |
| D. | SBR |
| Answer» C. teflon | |
| 275. |
Flexible plastic pipes are made of |
| A. | high density polyethylene (HDPE). |
| B. | low density polyethylene (LDPE). |
| C. | polypropylene. |
| D. | unsaturated polyester. |
| Answer» C. polypropylene. | |
| 276. |
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 |
| Answer» C. polypropylene | |
| 277. |
Polymers are |
| A. | micromolecules |
| B. | macromolecules |
| C. | sub-micromolecules |
| D. | none of these |
| Answer» C. sub-micromolecules | |
| 278. |
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 |
| Answer» C. Cellulose acetate | |
| 279. |
Bakelite is a/an |
| A. | addition polymer |
| B. | elastomer |
| C. | thermoplastic |
| D. | none of these |
| Answer» E. | |
| 280. |
The only natural thermoplastic resin, which is a product of animal life is |
| A. | rosin |
| B. | shellac |
| C. | amber |
| D. | copal |
| Answer» C. amber | |
| 281. |
Which of the following types of polymers has the strongest inter particle forces ? |
| A. | Elastomers |
| B. | Fibres |
| C. | Thermoplastics |
| D. | Thermosetting polymers |
| Answer» E. | |
| 282. |
Nylon-6 is manufactured from |
| A. | caprolactum. |
| B. | adipic acid and hexamethylene diamine. |
| C. | maleic anhydride and hexamethylene diamine. |
| D. | sebasic acid and hexamethylene diamine. |
| Answer» B. adipic acid and hexamethylene diamine. | |
| 283. |
A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of |
| A. | siloxane elastomers. |
| B. | polyamides. |
| C. | vinyl polymers. |
| D. | urea-formaldehyde resins. |
| Answer» E. | |
| 284. |
Liners of bags are usually made of |
| A. | polythene |
| B. | PVC |
| C. | polypropylene |
| D. | polyesters |
| Answer» D. polyesters | |
| 285. |
Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten |
| A. | saturated polyester |
| B. | polyurathane |
| C. | polystyrene |
| D. | either (b) or (c) |
| Answer» E. | |
| 286. |
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 acetale |
| C. | polyvinyl butyral |
| D. | PVC |
| Answer» D. PVC | |
| 287. |
Molecular weights of plastics ranges from |
| A. | 1000 to 5000 |
| B. | 5000 to 1000 |
| C. | 20000 to 25000 |
| D. | 10⁹ to 10¹¹ |
| Answer» D. 10⁹ to 10¹¹ | |
| 288. |
Vulcanisation of rubber does not increase its |
| A. | softness |
| B. | oxidation resistance |
| C. | weight & strength |
| D. | elasticity & water solubility |
| Answer» B. oxidation resistance | |
| 289. |
Addition of stabiliser during PVC manufacture is done to |
| A. | improve its impact strength. |
| B. | improve its elasticity. |
| C. | reduce the melt viscosity & glass transition temperature. |
| D. | prevent its thermal degradation. |
| Answer» E. | |
| 290. |
Ebonite is a/an |
| A. | highly vulcanised rubber. |
| B. | natural rubber. |
| C. | unvulcanised raw rubber. |
| D. | adhesive. |
| Answer» B. natural rubber. | |
| 291. |
Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten |
| A. | teflon |
| B. | bakelite |
| C. | SBR |
| D. | PVC |
| Answer» E. | |
| 292. |
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 | |
| 293. |
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces |
| A. | epoxy resin |
| B. | polyamide |
| C. | alkyd resin |
| D. | phenolic resin |
| Answer» D. phenolic resin | |
| 294. |
Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces |
| A. | nylon-6 |
| B. | dacron |
| C. | polyester |
| D. | PVC |
| Answer» C. polyester | |
| 295. |
Bristles of tooth brushes are made of |
| A. | nylon-6 |
| B. | nylon-66 |
| C. | polystyrene |
| D. | PVC |
| Answer» C. polystyrene | |
| 296. |
Which of the following is not a natural fibre? |
| A. | Silk |
| B. | Viscose rayon |
| C. | Wool |
| D. | Cotton |
| Answer» C. Wool | |
| 297. |
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. | |
| 298. |
Visco-elastic behaviour exhibited by plastics is a __________ like behaviour. |
| A. | solid |
| B. | liquid |
| C. | combination of solid & liquid |
| D. | neither solid nor liquid |
| Answer» D. neither solid nor liquid | |
| 299. |
Nylon-6 as compared to nylon-66 is |
| A. | harder. |
| B. | more abrasion resistant. |
| C. | having higher melting point. |
| D. | none of these. |
| Answer» E. | |
| 300. |
Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C. |
| A. | 1380 |
| B. | 1520 |
| C. | 1710 |
| D. | 1915 |
| Answer» D. 1915 | |