MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 229 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
____________ is a copolymer? |
| A. | Styrene butadiene rubber (SBR) |
| B. | Neoprene |
| C. | PVC |
| D. | None of these |
| Answer» B. Neoprene | |
| 152. |
Ion exchange resins are made of____________________? |
| A. | Lucite |
| B. | Sulphonated Bakelite |
| C. | Polystyrene |
| D. | Teflon |
| Answer» C. Polystyrene | |
| 153. |
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 |
| Answer» B. Polybutadiene | |
| 154. |
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 | |
| 155. |
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 | |
| 156. |
In nylon-6, the number 6 represents the total number of_________________? |
| A. | Carbon atoms in the ring |
| B. | Carbon atoms in the linear polymer chain |
| C. | Nitrogen atoms in the ring |
| D. | Hydrogen atoms in the ring |
| Answer» C. Nitrogen atoms in the ring | |
| 157. |
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 | |
| 158. |
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. | |
| 159. |
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 |
| Answer» C. Rayon | |
| 160. |
In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher ___________________? |
| A. | Densities |
| B. | Melting point |
| C. | Tensile strength |
| D. | Hardness, rigidity & brittleness |
| Answer» E. | |
| 161. |
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 |
| Answer» C. Cellulose derivatives, Polyamides, Polyurethane | |
| 162. |
Hot drink (e.g., tea) cups are usually made of _____________________? |
| A. | Polystyrene |
| B. | Polythene |
| C. | Polypropylene |
| D. | PVC |
| Answer» B. Polythene | |
| 163. |
Gutta percha rubber is_________________? |
| A. | Soft & tacky at room temperature |
| B. | An isomer of natural rubber |
| C. | A thermosetting resin |
| D. | Recovered by coagulation of rubber latex |
| Answer» C. A thermosetting resin | |
| 164. |
Glyptal used in the manufacture of paints & lacquers is a _____________ polymer? |
| A. | Polyamide |
| B. | Polystyrene |
| C. | Polyester |
| D. | Polyacrylonitrile |
| Answer» D. Polyacrylonitrile | |
| 165. |
Flexible plastic pipes are made of___________________? |
| A. | High density polyethylene (HDPE) |
| B. | Low density polyethylene (LDPE) |
| C. | Polypropylene |
| D. | Unsaturated polyester |
| Answer» C. Polypropylene | |
| 166. |
Flexible foam (for mattresses) are usually made of _________________? |
| A. | PVC |
| B. | Silicone rubber |
| C. | Polyurethanes |
| D. | Polyamides |
| Answer» D. Polyamides | |
| 167. |
Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its_________________? |
| A. | Elasticity |
| B. | Strength |
| C. | Plasticity |
| D. | Weathering characteristics |
| Answer» E. | |
| 168. |
______________ fibres are made of polyamides? |
| A. | Dacron |
| B. | Nylon |
| C. | Rayon |
| D. | Orion |
| Answer» C. Rayon | |
| 169. |
Epoxy resins (i.e., epoxide polymers) ? |
| A. | Are made by addition polymerisation reaction only |
| B. | Contain an epoxy group (fig bellow) at the ends of the polymer |
| C. | Are cross-linked polymers only |
| D. | Use emulsion polymerisation methods |
| Answer» C. Are cross-linked polymers only | |
| 170. |
Epoxy resin is____________________? |
| A. | Not used for surface coating |
| B. | A good abrasive |
| C. | An elastomer |
| D. | A polyester |
| Answer» C. An elastomer | |
| 171. |
Epoxy resin is a polymer containing two or more groups of the bellow fig. is 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. | |
| 172. |
Elastomers are__________________? |
| A. | Thermosetting material |
| B. | Exemplified by protein derivatives |
| C. | Having high flexural strength |
| D. | Having very high tensile strength and heat resistance |
| Answer» D. Having very high tensile strength and heat resistance | |
| 173. |
Ebonite is a/an___________________? |
| A. | Highly vulcanised rubber |
| B. | Natural rubber |
| C. | Unvulcanised raw rubber |
| D. | Adhesive |
| Answer» B. Natural rubber | |
| 174. |
Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of________________? |
| A. | Cold SBR |
| B. | Butyl rubber |
| C. | Bunai N |
| D. | Buna S |
| Answer» C. Bunai N | |
| 175. |
Diphenylamine is added to rubber to_________________? |
| A. | Vulcanise it |
| B. | Protect it from deterioration on exposure to air |
| C. | Make it non-inflammable |
| D. | Make it thermosetting |
| Answer» C. Make it non-inflammable | |
| 176. |
Density of low density polythene is about ____________ gm/c.c? |
| A. | 0.38 |
| B. | 0.56 |
| C. | 0.81 |
| D. | 0.91 |
| Answer» E. | |
| 177. |
Density of high density polythene is about __________ gm/c.c ? |
| A. | 1.18 |
| B. | 1.05 |
| C. | 0.95 |
| D. | 0.99 |
| Answer» D. 0.99 | |
| 178. |
Dacron is a/an___________________? |
| A. | Addition polymer |
| B. | Condensation polymer |
| C. | Polyester |
| D. | Both B. and C. |
| Answer» E. | |
| 179. |
Dacron (or Treylene) 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. | |
| 180. |
Dacron is a/an ___________________? |
| A. | Polyester |
| B. | Unsaturated polyester |
| C. | Polyamide |
| D. | Inorganic polymer |
| Answer» B. Unsaturated polyester | |
| 181. |
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. | |
| 182. |
Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding_________________? |
| A. | Glycerol |
| B. | Nitro cellulose |
| C. | Camphor |
| D. | None of these |
| Answer» D. None of these | |
| 183. |
Cross linked polymers formed from bi-and trifunctional 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 | |
| 184. |
Cross linked polymers are__________________? |
| A. | Thermoplastic |
| B. | Thermosetting |
| C. | Either A. or B. |
| D. | Fibres only |
| Answer» C. Either A. or B. | |
| 185. |
Contact lenses for eyes are made of Perspex, which is nothing but_______________? |
| A. | poly-methyl-methacrylate |
| B. | Polystyrene |
| C. | Unsaturated polyester |
| D. | Polypropylene |
| Answer» B. Polystyrene | |
| 186. |
Condensation polymerisation of _____________ produces Bakelite? |
| A. | Propylene |
| B. | Phenol & formaldehyde |
| C. | Phenol & acetaldehyde |
| D. | Urea & formaldehyde |
| Answer» C. Phenol & acetaldehyde | |
| 187. |
Condensation polymerisation of formaldehyde with _____________ does not produce phenolic resin? |
| A. | Resorcinol |
| B. | Phenol |
| C. | Para-cresol |
| D. | Melamine |
| Answer» E. | |
| 188. |
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 |
| Answer» E. | |
| 189. |
Condensation polymerisation is not involved in the manufacture of_________________? |
| A. | Teflon |
| B. | Polythene |
| C. | Terylene |
| D. | Nylon |
| Answer» C. Terylene | |
| 190. |
Commercial production of polypropylene employs _____________ polymerisation? |
| A. | Emulsion |
| B. | Suspension |
| C. | Solution |
| D. | Bulk |
| Answer» D. Bulk | |
| 191. |
Collapsible tubes for tooth paste are produced by _____________ extrusion? |
| A. | Direct |
| B. | Indirect |
| C. | Impact |
| D. | None of these |
| Answer» D. None of these | |
| 192. |
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 |
| Answer» C. Polyester | |
| 193. |
Cellulose is the main constituent of most ______________ fibres? |
| A. | Acrylic |
| B. | Spandex |
| C. | Synthetic |
| D. | Natural |
| Answer» E. | |
| 194. |
Cellulose content in bamboo fibre is about ______________ percent? |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 195. |
Celluloid is__________________? |
| A. | Cellulose acetate |
| B. | Regenerated cellulose |
| C. | Cellulose nitrate |
| D. | Cellulose acetate butyrate |
| Answer» D. Cellulose acetate butyrate | |
| 196. |
Cation exchange resins used in water treatment is made from _____________ resin? |
| A. | Urea formaldehyde |
| B. | Epoxy |
| C. | Amino |
| D. | Phenolic |
| Answer» B. Epoxy | |
| 197. |
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 | |
| 198. |
Catalyst used in the production of high density polythene by low pressure Ziegler process is ____________________? |
| A. | Aluminium triethyl activated with TiCl4 |
| B. | Platinum |
| C. | Molybdenum |
| D. | Nickel |
| Answer» B. Platinum | |
| 199. |
Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________? |
| A. | Phenol |
| B. | Naphthalene |
| C. | Benzene |
| D. | Pyridine |
| Answer» D. Pyridine | |
| 200. |
Buna-S is also known as_________________? |
| A. | Teflon |
| B. | PTFE |
| C. | SBR |
| D. | Polycrylates |
| Answer» D. Polycrylates | |