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.
| 101. |
The conversion of caprolactum in the above case is about __________ percent. |
| A. | 25 |
| B. | 50 |
| C. | 70 |
| D. | 90 |
| Answer» E. | |
| 102. |
Polyvinyl acetate is never used for making |
| A. | moulded articles |
| B. | fibres |
| C. | adhesives |
| D. | all (a), (b) & (c) |
| Answer» B. fibres | |
| 103. |
Cellulose content in bomboo fibre is about __________ percent. |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 104. |
Maximum consumption of polymers is in |
| A. | electrical insulation |
| B. | toys making |
| C. | coating and films |
| D. | packaging |
| Answer» D. packaging | |
| 105. |
Phenol formaldehyde |
| A. | employs addition polymerisation. |
| B. | employs condensation polymerisation. |
| C. | is a monomer. |
| D. | is an abrasive material. |
| Answer» C. is a monomer. | |
| 106. |
The inter particle forces between linear chains in nylon-66 are __________ bonds. |
| A. | hydrogen |
| B. | covalant |
| C. | ionic |
| D. | none of these |
| Answer» B. covalant | |
| 107. |
Alkyd resin is a/an |
| A. | polyamide |
| B. | polyester |
| C. | polyolefin |
| D. | addition polymer |
| Answer» C. polyolefin | |
| 108. |
Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene. |
| A. | nitrile |
| B. | silicone |
| C. | neoprene |
| D. | butyl |
| Answer» E. | |
| 109. |
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 | |
| 110. |
Rayon is superior to cotton in making gauge for wound treatment, because rayon |
| A. | is a synthetic polymer. |
| B. | does not stick to the wound unlike cotton. |
| C. | can absorb over 90% of its own weight of water. |
| D. | both (b) and (c). |
| Answer» C. can absorb over 90% of its own weight of water. | |
| 111. |
A copolymer of vinyl and vinylidine chloride is called |
| A. | treylene |
| B. | orlon |
| C. | saran |
| D. | dacron |
| Answer» D. dacron | |
| 112. |
Mastication of rubber means |
| A. | its softening. |
| B. | a treatment to retard its deterioration due to oxidation. |
| C. | improving its curing rate. |
| D. | depression of its freezing point. |
| Answer» B. a treatment to retard its deterioration due to oxidation. | |
| 113. |
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 | |
| 114. |
Condensation polymerisation is not involved in the manufacture of |
| A. | teflon |
| B. | polythene |
| C. | terylene |
| D. | nylon |
| Answer» C. terylene | |
| 115. |
Which of the following is an elastomer ? |
| A. | Thiokol |
| B. | Phenol formaldehyde |
| C. | Urea formaldehyde |
| D. | Polystyrene |
| Answer» B. Phenol formaldehyde | |
| 116. |
Nylon-6 is a |
| A. | polyamide |
| B. | thermosetting resin |
| C. | polyester |
| D. | none of these |
| Answer» B. thermosetting resin | |
| 117. |
Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals. |
| A. | organic peroxides |
| B. | sulphuric acid |
| C. | hydroflouric acid |
| D. | none of these |
| Answer» B. sulphuric acid | |
| 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. |
Which of the following is an inorganic polymer ? |
| A. | Teflon |
| B. | Perspex |
| C. | Silicones |
| D. | Bakelite |
| Answer» D. Bakelite | |
| 120. |
Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber ? |
| A. | Carbon |
| B. | Alkylated diphenyl amine |
| C. | Thiokol |
| D. | Magnesium |
| Answer» C. Thiokol | |
| 121. |
Non sulphonated hard bakelites are not used for making |
| A. | ion-exchange resins |
| B. | fountain pen barrels |
| C. | formica table tops |
| D. | combs |
| Answer» B. fountain pen barrels | |
| 122. |
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 | |
| 123. |
Polymethyl methacrylate, which is an acrylic resin, is also called |
| A. | thiokol |
| B. | plexiglass or lucite |
| C. | dacron |
| D. | teflon |
| Answer» C. dacron | |
| 124. |
Thermoplastic resins usually |
| A. | remain hard as long as they are hot. |
| B. | can not be reclaimed from waste. |
| C. | permanent setting resins. |
| D. | less brittle than thermosetting resins. |
| Answer» E. | |
| 125. |
Nylon-66 compared to nylon-6 has |
| A. | lower melting point. |
| B. | more abrasion resistant properties. |
| C. | higher hardness. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 126. |
Which of the following is not present in bagasse fibre ? |
| A. | Cellulose |
| B. | Lignin |
| C. | Pentogens |
| D. | None of these |
| Answer» E. | |
| 127. |
Molecular weight of polymers are in the range of |
| A. | 10 to 10³ |
| B. | 10²-10⁷ |
| C. | 10⁷-10⁹ |
| D. | 10⁹-10¹¹ |
| Answer» C. 10⁷-10⁹ | |
| 128. |
Buna-S is a __________ material. |
| A. | fibrous |
| B. | plastic |
| C. | resinous |
| D. | rubbery |
| Answer» E. | |
| 129. |
Bakelite (phenol-formaldehyde) resin can not be used as |
| A. | decorative paint. |
| B. | decorative laminates. |
| C. | electrical insulation. |
| D. | glass reinforced plastics. |
| Answer» B. decorative laminates. | |
| 130. |
__________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR. |
| A. | Percent elongation |
| B. | Resilience |
| C. | Freezing point |
| D. | Strength |
| Answer» C. Freezing point | |
| 131. |
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. | |
| 132. |
Ion exchange resins are made of |
| A. | lucite |
| B. | sulphonated bakelite |
| C. | polystyrene |
| D. | teflon |
| Answer» C. polystyrene | |
| 133. |
Which of the following is not a polymer of two monomers ? |
| A. | Teflon |
| B. | Bakelite |
| C. | SBR |
| D. | None of these |
| Answer» B. Bakelite | |
| 134. |
Polythene is a/an |
| A. | addition polymerisation product. |
| B. | condensation polymerisation product. |
| C. | thermosetting material. |
| D. | none of these. |
| Answer» B. condensation polymerisation product. | |
| 135. |
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. | |
| 136. |
Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres. |
| A. | improving the stretchability |
| B. | dyeing/colouring |
| C. | detergent solution washing |
| D. | glycol soaking |
| Answer» D. glycol soaking | |
| 137. |
Which of the following is not a condensation polymer ? |
| A. | Bakelite |
| B. | Melamine polymer |
| C. | Polymethylmethacrylate (PMMA) |
| D. | None of these |
| Answer» D. None of these | |
| 138. |
Polypropylene compared to polythene is |
| A. | harder |
| B. | stronger |
| C. | lighter |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 139. |
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent. |
| A. | 1-1000 |
| B. | 1000-1500 |
| C. | 1500-2000 |
| D. | 2000-2500 |
| Answer» B. 1000-1500 | |
| 140. |
Which one contains maximum percentage of Al₂O₃ ? |
| A. | Firebrick |
| B. | Sillimanite |
| C. | Magnesite |
| D. | Aluminous firebrick |
| Answer» C. Magnesite | |
| 141. |
Trade name of __________ is neoprene. |
| A. | polychloroprene |
| B. | polyisoprene |
| C. | polytetraflouroethylene |
| D. | poly vinyl acetate |
| Answer» B. polyisoprene | |
| 142. |
Thermosetting polymers as compared to thermoplastic polymers |
| A. | are formed by addition polymerisation. |
| B. | have three dimensional structure. |
| C. | have linear structure. |
| D. | none of these. |
| Answer» C. have linear structure. | |
| 143. |
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 | |
| 144. |
β - glucose is the monomer of |
| A. | cellulose |
| B. | starch |
| C. | protein |
| D. | none of these |
| Answer» B. starch | |
| 145. |
Contact lenses for eyes are made of perspex, which is nothing but |
| A. | polymethylmethacrylate |
| B. | polystyrene |
| C. | unsaturated polyester |
| D. | polypropylene |
| Answer» B. polystyrene | |
| 146. |
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. | |
| 147. |
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. | |
| 148. |
Which of the following is not an elastomer ? |
| A. | Polyisoprene |
| B. | Neoprene |
| C. | Nitrile-butadiene |
| D. | None of these |
| Answer» E. | |
| 149. |
Terylene is |
| A. | same as dacron |
| B. | a polyester |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 150. |
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 | |