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.
| 201. |
_ In condensation polymerisation as compared to addition polymerisation$? |
| A. | The monomers are unsaturated compounds |
| B. | No co-product is lost |
| C. | The monomers contain two functional groups |
| D. | Generally only one monomer is involved |
| Answer» D. Generally only one monomer is involved | |
| 202. |
_ Poly Vinyl chloride (PVC) is a __________ material.$? |
| A. | Thermoplastic |
| B. | Thermosetting |
| C. | Fibrous |
| D. | Chemically active |
| Answer» B. Thermosetting | |
| 203. |
_ Polyvinyl alcohol is used as a$? |
| A. | Cation/anion exchanger |
| B. | Water soluble adhesive |
| C. | Textile fibre |
| D. | Non-sticky coating on frying pans |
| Answer» C. Textile fibre | |
| 204. |
_ Thermosplastic materials$? |
| A. | Do not soften on application of heat |
| B. | Are heavily branched molecules |
| C. | Are solvent insoluble |
| D. | None of these |
| Answer» E. | |
| 205. |
_ The main use of butadiene is$? |
| A. | As a plasticiser for unsaturated polyester |
| B. | In the manufacture of synthetic rubber |
| C. | As an anti-skimming agent in paint |
| D. | None of these |
| Answer» C. As an anti-skimming agent in paint | |
| 206. |
_ Terylene is$? |
| A. | Same as dacron |
| B. | A polyester |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 207. |
_ Vulcanisation of rubber$? |
| A. | Decreases its tensile strength |
| B. | Increases its ozone & oxygen reactivity |
| C. | Increases its oil & solvent resistance |
| D. | Converts its plasticity into elasticity |
| Answer» E. | |
| 208. |
_ Branched chain polymers compared to linear polymers have higher$? |
| A. | Density |
| B. | Tensile strength |
| C. | Melting point |
| D. | Degree of irregularity in atomic packing |
| Answer» E. | |
| 209. |
_ 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.$? |
| A. | Thermoplastic |
| B. | Thermosetting |
| C. | Elastometric |
| D. | Brittleness |
| Answer» D. Brittleness | |
| 210. |
_ In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of$? |
| A. | Cross linked polystyrene |
| B. | Phenol formaldehyde resins |
| C. | Polyesters |
| D. | Polyamides |
| Answer» B. Phenol formaldehyde resins | |
| 211. |
_ Vulcanisation of rubber does not increase its$? |
| A. | Softness |
| B. | Oxidation resistance |
| C. | Weight & strength |
| D. | Elasticity & water solubility |
| Answer» B. Oxidation resistance | |
| 212. |
_ Which of the following is an elastomer?$? |
| A. | Thiokol |
| B. | Phenol formaldehyde |
| C. | Urea formaldehyde |
| D. | Polystyrene |
| Answer» B. Phenol formaldehyde | |
| 213. |
_ Flexible plastic pipes are made of$? |
| A. | High density polyethylene (HDPE) |
| B. | Low density polyethylene (LDPE) |
| C. | Polypropylene |
| D. | Unsaturated polyester |
| Answer» C. Polypropylene | |
| 214. |
_ Which of the following is not a natural polymer?$? |
| A. | Nucleic acids e.g. RNA and DNA |
| B. | Polysaccharides |
| C. | Polyisoprene |
| D. | Polyurethane |
| Answer» E. | |
| 215. |
_ Nylon-66 is a polyamide of$? |
| A. | Hexamethylene diamine and adipic acid |
| B. | Adipic acid and methyl amine |
| C. | Vinyl chloride and formaldeyde |
| D. | None of these |
| Answer» B. Adipic acid and methyl amine | |
| 216. |
_ Main constituent of natural rubber is$? |
| A. | Polystyrene |
| B. | Polyisoprene |
| C. | Polybutadiene |
| D. | Poly chloroprene |
| Answer» C. Polybutadiene | |
| 217. |
_ Which of the following is not a natural fibre?$? |
| A. | Silk |
| B. | Viscose rayon |
| C. | Wool |
| D. | Cotton |
| Answer» C. Wool | |
| 218. |
_ Catalyst used in the production of high density polythene by low pressure Ziegler process is$? |
| A. | Aluminium triethyl activated with TiCl‚ÇÑ |
| B. | Platinum |
| C. | Molybdenum |
| D. | Nickel |
| Answer» B. Platinum | |
| 219. |
_ Which of the following types of polymers has the strongest inter particle forces?$? |
| A. | Elastomers |
| B. | Fibres |
| C. | Thermoplastics |
| D. | Thermosetting polymers |
| Answer» E. | |
| 220. |
_ Polymerisation of poly functional monomers produces polymers having$? |
| A. | Good machanical strength |
| B. | Low viscosity |
| C. | Low melting point |
| D. | None of these |
| Answer» B. Low viscosity | |
| 221. |
_ In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the$? |
| A. | Hexamethylene diamine and the ring |
| B. | Hexamethylene diamine and the adipic acid |
| C. | Adipic acid and the ring |
| D. | None of these |
| Answer» C. Adipic acid and the ring | |
| 222. |
_ Low pressure Zeigler process of polythene manufacture$? |
| A. | Employs a pressure of 30 kgf/cm² |
| B. | Achieves an yield of 95-98% based on ethylene |
| C. | Produces very low density polythene |
| D. | Does not use any catalyst for polymerisation |
| Answer» C. Produces very low density polythene | |
| 223. |
_ Which of the following is a polymer of hexamethylene diamine and adipic acid?$? |
| A. | Nylon-6 |
| B. | Nylon-66 |
| C. | Nylon-6, 10 |
| D. | Epoxy resin |
| Answer» C. Nylon-6, 10 | |
| 224. |
_ Branched chair polymers as compared to linear polymers have$? |
| A. | Higher melting point |
| B. | Higher tensile strength |
| C. | Lower density |
| D. | None of these |
| Answer» D. None of these | |
| 225. |
_ Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.$? |
| A. | 50 |
| B. | 75 |
| C. | 90 |
| D. | 99 |
| Answer» D. 99 | |
| 226. |
_ Which of the following is generally not drawn into fibre?$? |
| A. | Polyamide |
| B. | Unsaturated polyesters |
| C. | Saturated polyesters |
| D. | Polyacrylonitrile |
| Answer» C. Saturated polyesters | |
| 227. |
_ Buna-S is a __________ material.$? |
| A. | Fibrous |
| B. | Plastic |
| C. | Resinous |
| D. | Rubbery |
| Answer» E. | |
| 228. |
_ The monomer of poly vinyl chloride (PVC) is$? |
| A. | Chloroethene |
| B. | Ethylene dichloride |
| C. | Ethyl chloride |
| D. | Chloroform |
| Answer» B. Ethylene dichloride | |
| 229. |
_ Polyvinyl acetate is never used for making$? |
| A. | Moulded articles |
| B. | Fibres |
| C. | Adhesives |
| D. | All of the above |
| Answer» B. Fibres | |
| 230. |
_ The monomer of natural rubber is$? |
| A. | DMT |
| B. | Isoprene |
| C. | 2 methyl-1-propene |
| D. | Both B and C |
| Answer» E. | |
| 231. |
_ Cellulose content in bomboo fibre is about __________ percent.$? |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 232. |
_ Which of the following rubbers has the widest service temperature range (-75 to 275°C) ?$? |
| A. | Butyl rubber |
| B. | Silicon rubber |
| C. | Nitrile rubber |
| D. | Silicone rubber |
| Answer» E. | |
| 233. |
_ Cellulose is the main contituent of most __________ fibres.$? |
| A. | Acrylic |
| B. | Spandex |
| C. | Synthetic |
| D. | Natural |
| Answer» E. | |
| 234. |
_ Silicone resins, which are highly water repellant and has good heat resistance can not be used$? |
| A. | As room temperature adhesive |
| B. | As grease & lubricant |
| C. | Hydraulic fluid for heat transfer |
| D. | Resin for lamination |
| Answer» B. As grease & lubricant | |
| 235. |
__Teflon is__ |
| A. | Phenol formaldehyde |
| B. | An inorganic polymer |
| C. | Polytetra florouethylene (PTFE) |
| D. | A monomer |
| Answer» D. A monomer | |
| 236. |
__Dacron is a__ |
| A. | Condensation polymerisation product of hexamethylene diamine and adipic acid |
| B. | Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol |
| C. | Thermosetting material |
| D. | None of these |
| Answer» E. | |
| 237. |
_Cross linked polymers are$? |
| A. | Thermoplastic |
| B. | Thermosetting |
| C. | Either A or B |
| D. | Fibres only |
| Answer» C. Either A or B | |
| 238. |
_The process involved in converting rubber into a thin sheet or coating it on fabric is called$? |
| A. | Extrusion |
| B. | Mastication |
| C. | Calendering |
| D. | Vulcanisation |
| Answer» D. Vulcanisation | |
| 239. |
_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.$? |
| A. | Viscose rayon |
| B. | Acrylic |
| C. | Polyvinyl acetate |
| D. | Saturated polyester |
| Answer» E. | |
| 240. |
_Flexible foam (for mattresses) are usually made of$? |
| A. | PVC |
| B. | Silicone rubber |
| C. | Polyurethanes |
| D. | Polyamides |
| Answer» D. Polyamides | |
| 241. |
_Which of the following is the lowest cost plastic commercially available?$? |
| A. | Polythene |
| B. | Teflon |
| C. | Bakelite |
| D. | PVC |
| Answer» B. Teflon | |
| 242. |
_Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness?$? |
| A. | Phosphorous |
| B. | Carbon black |
| C. | Pine oil |
| D. | Rosin |
| Answer» C. Pine oil | |
| 243. |
_Polystyrene is a __________ plastic at room temperature.$? |
| A. | Ductile |
| B. | Brittle |
| C. | Malleable |
| D. | None of these |
| Answer» C. Malleable | |
| 244. |
_Hot drink (e.g, tea) cups are usually made of$? |
| A. | Polystyrene |
| B. | Polythene |
| C. | Polypropylene |
| D. | PVC |
| Answer» B. Polythene | |
| 245. |
_Zeigler - Natta catalyst (AlR‚ÇÉ - AlCl‚ÇÉ) is used in the polymerisation of$? |
| A. | Vinyl acetate |
| B. | Vinyl chloride |
| C. | Propylene |
| D. | Styrene |
| Answer» D. Styrene | |
| 246. |
___________ is a natural fibre.$? |
| A. | Cellulose |
| B. | Dacron |
| C. | Nylon-6 |
| D. | None of these |
| Answer» B. Dacron | |
| 247. |
_SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at$? |
| A. | 1:3 |
| B. | 3:1 |
| C. | 1:2 |
| D. | 2:1 |
| Answer» B. 3:1 | |
| 248. |
_The starting material used for the manufacture of caprolactum is$? |
| A. | Ethyl benzene |
| B. | Cyclohexane |
| C. | Ethylene glycol |
| D. | DMT |
| Answer» C. Ethylene glycol | |
| 249. |
_Maximum consumption of polymers is in$? |
| A. | Electrical insulation |
| B. | Toys making |
| C. | Coating and films |
| D. | Packaging |
| Answer» D. Packaging | |
| 250. |
_Plastic tubes & pipes are generally made by __________ moulding.$? |
| A. | Injection |
| B. | Transfer |
| C. | Extrusion |
| D. | Compression |
| Answer» D. Compression | |