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.
| 101. |
*$_Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.? |
| A. | -20 to 25 |
| B. | 50 to 75 |
| C. | 100 to 150 |
| D. | 250-280 |
| Answer» E. | |
| 102. |
*$_Most of the plastics are safe to be used upto a maximum temperature of __________ °C.? |
| A. | 100 |
| B. | 150 |
| C. | 350 |
| D. | 450 |
| Answer» C. 350 | |
| 103. |
*$___________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.? |
| A. | Fibrous |
| B. | Leathery |
| C. | Rubbery |
| D. | Hard |
| Answer» C. Rubbery | |
| 104. |
*$_Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically? |
| A. | Polymethyl methacrylate (PMMA) |
| B. | Polytetraflouroethylene(PTFE) |
| C. | Polycarbonates |
| D. | Phenolic resins |
| Answer» B. Polytetraflouroethylene(PTFE) | |
| 105. |
*$_Polyurathane can not be used for making? |
| A. | Mattresses & foam |
| B. | Coating material |
| C. | Adhesives |
| D. | Bottles |
| Answer» E. | |
| 106. |
*$_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 | |
| 107. |
*$_All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic? |
| A. | Filaments |
| B. | Pipes |
| C. | Buckets |
| D. | Tubings |
| Answer» D. Tubings | |
| 108. |
*/*_Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but? |
| A. | Polyacrylonitrile |
| B. | Polyamide |
| C. | Saturated polyester |
| D. | Alkyd resin |
| Answer» B. Polyamide | |
| 109. |
*/*_Phthalic anhydride is used? |
| A. | In making PVC |
| B. | As plasticisers |
| C. | In insecticides manufacture |
| D. | For making nylon-6 |
| Answer» C. In insecticides manufacture | |
| 110. |
*/*_Starting material for the production of SBR is? |
| A. | Ethyl alcohol |
| B. | Ethylene |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 111. |
*/*_Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styrene-acrylonitfile copolymer with butadiene based elastomer, is a/an? |
| A. | Rigid foam |
| B. | Engineering plastic |
| C. | Thermosetting polymer |
| D. | Spongy rubber |
| Answer» C. Thermosetting polymer | |
| 112. |
*/*_Lavatory cisterns are normally made of? |
| A. | Expanded polystyrene |
| B. | Saturated polyester |
| C. | Perspex |
| D. | PVC |
| Answer» B. Saturated polyester | |
| 113. |
*/*_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 | |
| 114. |
*/*_Bristles of tooth brushes are made of? |
| A. | Nylon-6 |
| B. | Nylon-66 |
| C. | Polystyrene |
| D. | PVC |
| Answer» C. Polystyrene | |
| 115. |
*/*_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 | |
| 116. |
*/*_Adipic acid is an intermediate in the manufacture of? |
| A. | Perspex |
| B. | Nylon-66 |
| C. | Polystyrene |
| D. | Bakelite |
| Answer» C. Polystyrene | |
| 117. |
*/*_Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?? |
| A. | 50000 |
| B. | 51600 |
| C. | 49200 |
| D. | 50800 |
| Answer» B. 51600 | |
| 118. |
*/*_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. | |
| 119. |
*/*_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 |
| Answer» C. Can be made thermosetting by adding a plasticiser | |
| 120. |
*/*_Thiokol is nothing but? |
| A. | Polysulphide rubber |
| B. | Polyamide fibre |
| C. | Engineering plastic |
| D. | Exponded polystyrene |
| Answer» B. Polyamide fibre | |
| 121. |
*/*_Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is? |
| A. | Ni |
| B. | V‚ÇÇO‚ÇÖ |
| C. | Fe |
| D. | Aluminium triethyl combined with titanium tetrachloride |
| Answer» E. | |
| 122. |
*/*_Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces? |
| A. | Epoxy resin |
| B. | Polyamide |
| C. | Alkyd resin |
| D. | Phenolic resin |
| Answer» D. Phenolic resin | |
| 123. |
*/*_Which of the following is an inorganic polymer?? |
| A. | Teflon |
| B. | Perspex |
| C. | Silicones |
| D. | Bakelite |
| Answer» D. Bakelite | |
| 124. |
*/*_The rate controlling step in the manufacture of silicone rubber is the? |
| A. | Polymer termination step |
| B. | Condensation of siloxane to silicone |
| C. | Initial hydrolysis of silicone monomer |
| D. | None of these |
| Answer» D. None of these | |
| 125. |
*/*___________ is produced by polymerisation of chloroprene.? |
| A. | Thiokol (a polysulphide rubber) |
| B. | Butyl rubber |
| C. | Neoprene |
| D. | Polyurathane rubber |
| Answer» D. Polyurathane rubber | |
| 126. |
*/*_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. | |
| 127. |
*/*___________ is not a condensation polymer.? |
| A. | Teflon |
| B. | Nylon-66 |
| C. | Dacron |
| D. | Polystyrene |
| Answer» B. Nylon-66 | |
| 128. |
*/*_The repeating units of PTFE are? |
| A. | Cl‚ÇÇCH = CH‚ÇÉ |
| B. | F‚ÇÇ C = CF‚ÇÇ |
| C. | F‚ÇÉ C = CF‚ÇÉ |
| D. | FClC = CF‚ÇÇ |
| Answer» C. F‚Äö√á√â C = CF‚Äö√á√â | |
| 129. |
*/*_Synthetic polymer produced by using terephthalic acid and ethylene glycol is? |
| A. | Terylene |
| B. | Nylon-66 |
| C. | PVC |
| D. | Polyesterene |
| Answer» B. Nylon-66 | |
| 130. |
*/*_Which of the following is stretched into fibres?? |
| A. | Saturated polyester |
| B. | Unsaturated polyester |
| C. | Isoprene |
| D. | Bakelite |
| Answer» B. Unsaturated polyester | |
| 131. |
*/*_Diphenylamine is added to rubber to? |
| A. | Valcanise 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 | |
| 132. |
*/*___________ tubes are good substitude for human blood vessels onrheart by-pass operation.? |
| A. | PVC |
| B. | Polythene |
| C. | Teflon/dacron |
| D. | Polystyrene |
| Answer» D. Polystyrene | |
| 133. |
*/*_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 | |
| 134. |
*/*_The generic chemical name for the class of polymers which are commerically known as nylons is? |
| A. | Polyolefins |
| B. | Polyamide |
| C. | Polyacrylate |
| D. | Polyurathane |
| Answer» C. Polyacrylate | |
| 135. |
*/*_Which of the following is not a polyolefin?? |
| A. | Polystyrene |
| B. | Polypropylene |
| C. | Neoprene |
| D. | None of these |
| Answer» D. None of these | |
| 136. |
*/*_Plastic articles are normally produced by __________ moulding.? |
| A. | Green sand |
| B. | Injection |
| C. | Shell |
| D. | Dry sand |
| Answer» C. Shell | |
| 137. |
*/*_Linear polymers are normally? |
| A. | Thermosetting |
| B. | Thermosplastic |
| C. | Elastometric |
| D. | Having extremely high softening point |
| Answer» C. Elastometric | |
| 138. |
*/*___________ is normally used for the manufacture of refrigerator components and transistor parts.? |
| A. | Polyproylene |
| B. | Polystyrene |
| C. | Polyester |
| D. | Polyurathene |
| Answer» C. Polyester | |
| 139. |
*/*_Unbreakable crockeries are made from __________ polymers.? |
| A. | Polystyrene |
| B. | Melamine |
| C. | Polystyrene |
| D. | Polyurathane |
| Answer» C. Polystyrene | |
| 140. |
*/*_In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer?? |
| A. | Bakelite (phenol formaldehyde) |
| B. | Polyester |
| C. | Polythene |
| D. | Nylon-6 |
| Answer» B. Polyester | |
| 141. |
*/*_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 | |
| 142. |
*/*_Molecular weight of polymers are in the range of? |
| A. | 10 to 10³ |
| B. | 10²-10⁷ |
| C. | 10⁷-10⁹ |
| D. | 10‚Åπ-10¬π¬π |
| Answer» C. 10‚Äö√Ö‚àë-10‚Äö√ÖœÄ | |
| 143. |
*/*_Polymethyl methacrylate (PMMA) is known as? |
| A. | Bakelite |
| B. | Teflon |
| C. | Perspex |
| D. | Nylon-6 |
| Answer» D. Nylon-6 | |
| 144. |
*/*_Caprolactum, a raw material for the manufacture of nylon-6, is produced from? |
| A. | Phenol |
| B. | Naphthalene |
| C. | Benzene |
| D. | Pyridine |
| Answer» D. Pyridine | |
| 145. |
*/*_Buna-N is also called? |
| A. | Butyl rubber |
| B. | Nitrile rubber |
| C. | Neoprene |
| D. | Thiokol |
| Answer» C. Neoprene | |
| 146. |
*/*_Phenol formaldehyde is produced by condensation polymerisation. It is also known as? |
| A. | Teflon |
| B. | Bakelite |
| C. | Polyester |
| D. | Nylon-66 |
| Answer» C. Polyester | |
| 147. |
*/*_Neoprene is chemically known as? |
| A. | Polybutandiene |
| B. | Styrene butadiene rubber (SBR) |
| C. | Polyurethane |
| D. | Poly chloroprene |
| Answer» E. | |
| 148. |
*/*_Ebonite is a/an? |
| A. | Highly vulcanised rubber |
| B. | Natural rubber |
| C. | Unvulcanised raw rubber |
| D. | Adhesive |
| Answer» B. Natural rubber | |
| 149. |
*/*_Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their? |
| A. | Molecular sizes |
| B. | Magnitude of intermolecular forces |
| C. | Resistance to heat |
| D. | Polymerisation mechanism |
| Answer» C. Resistance to heat | |
| 150. |
*/*_Plasticisers are added to synthetic plastics to? |
| A. | Impart flexibility |
| B. | Improve workability during fabrication |
| C. | Develop new improved properties not present in the original resin |
| D. | All of the above |
| Answer» E. | |