MCQOPTIONS
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MCQOPTIONS
This section includes 1331 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. |
Pick out the endothermic reaction out of the following ? |
| A. | C+ ½O2 = CO |
| B. | CO + 3H2 = CH4 + H2O |
| C. | CaCO3 = CaO + CO2 |
| D. | CO + ½O2 = CO2 |
| Answer» D. CO + ½O2 = CO2 | |
| 202. |
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 | |
| 203. |
Phthalic anhydride is produced by the oxidation of _________________? |
| A. | Naphthalene |
| B. | Benzene |
| C. | Toluene |
| D. | Aniline |
| Answer» C. Toluene | |
| 204. |
Phthalic anhydride is made by the ______________________? |
| A. | Oxidation of naphthalene |
| B. | Oxidation of benzene |
| C. | Dehydrogenation of ethyl benzene |
| D. | None of these |
| Answer» B. Oxidation of benzene | |
| 205. |
Phosphoric acid is prepared from_____________________? |
| A. | Cryolite |
| B. | Chalcopyrite |
| C. | Rock phosphate |
| D. | None of these |
| Answer» D. None of these | |
| 206. |
Phosphate rock is a raw material for the manufacture of____________________? |
| A. | Phosphoric acid |
| B. | Phosphorous |
| C. | Superphosphates |
| D. | All A , B. and C |
| Answer» E. | |
| 207. |
Phenolic antiseptics are added in the __________________ soap? |
| A. | Shaving |
| B. | Medicated |
| C. | Metallic |
| D. | Transparent |
| Answer» C. Metallic | |
| 208. |
Phenol formaldehyde is produced by condensation polymerisation. It is also known as_____________________? |
| A. | Teflon |
| B. | Bakelite |
| C. | Polyester |
| D. | Nylon-66 |
| Answer» C. Polyester | |
| 209. |
Phenol formaldehyde resin is used as an adhesive in making__________________? |
| A. | Laminates |
| B. | Card boxes |
| C. | Furniture |
| D. | Books |
| Answer» B. Card boxes | |
| 210. |
Phenol is mainly used____________________? |
| A. | To produce benzene |
| B. | To produce phenol formaldehyde |
| C. | To produce polyester resin |
| D. | As a plasticiser for unsaturated polyester |
| Answer» C. To produce polyester resin | |
| 211. |
Phenol formaldehyde____________________? |
| A. | Employs addition polymerisation |
| B. | Employs condensation polymerisation |
| C. | Is a monomer |
| D. | Is an abrasive material |
| Answer» C. Is a monomer | |
| 212. |
Permanent hardness of water is due to the presence of calcium & magnesium __________________? |
| A. | Bi-carbonates |
| B. | Sulphates & chlorides |
| C. | Carbonate |
| D. | None of these |
| Answer» C. Carbonate | |
| 213. |
Permanent hardness of water can be removed by_________________? |
| A. | Addition of soda ash to it |
| B. | Treating it with zeolites |
| C. | Passing it through sodium hexametaphosphate |
| D. | All A , B, and C. |
| Answer» E. | |
| 214. |
Permanent hardness of water can be removed by____________________? |
| A. | Simply boiling |
| B. | Adding alum |
| C. | Passing it through cation & anion exchangers |
| D. | All (A), B. and (C) |
| Answer» D. All (A), B. and (C) | |
| 215. |
Permanent hardness of water can be removed by___________________? |
| A. | Boiling |
| B. | Adding Ca(OH)2 |
| C. | Boiling it with Na2CO3 |
| D. | None of these |
| Answer» D. None of these | |
| 216. |
Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about ___________________? |
| A. | 0.1 to 0.5 |
| B. | 1 to 5 |
| C. | 5 to 10 |
| D. | 15 to 25 |
| Answer» B. 1 to 5 | |
| 217. |
Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________? |
| A. | 0.5 |
| B. | 5 |
| C. | 20 |
| D. | 35 |
| Answer» C. 20 | |
| 218. |
Percentage of alcohol in beer may be around ______________________ percent? |
| A. | 2-8 |
| B. | 18-23 |
| C. | 27-32 |
| D. | 1-4 |
| Answer» B. 18-23 | |
| 219. |
Penicillin is separated from fermented broth by ____________________? |
| A. | Extraction with amyl or butyl acetate |
| B. | Ternary Azeotropic distillation |
| C. | Evaporator in calandria |
| D. | Extractive distillation |
| Answer» B. Ternary Azeotropic distillation | |
| 220. |
Penicillin is made employing _______________ fermentation process? |
| A. | Continuous |
| B. | Aerobic batch |
| C. | Anaerobic batch |
| D. | None of these |
| Answer» C. Anaerobic batch | |
| 221. |
Penicillin, an antibiotic drug was discovered by__________________? |
| A. | Alexander |
| B. | Flaming |
| C. | Doctor Zhivago |
| D. | None of these |
| Answer» B. Flaming | |
| 222. |
Pasteurisation of milk means______________________? |
| A. | Removal of fatty and albuminous substance from it |
| B. | Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics |
| C. | Inhibiting the growth of micro-organisms without killing them |
| D. | None of these |
| Answer» C. Inhibiting the growth of micro-organisms without killing them | |
| 223. |
Parathion and Malathion are _____________________? |
| A. | Pesticides |
| B. | Plasticisers for unsaturated polyesters |
| C. | Pain-relieving drugs (analgesic) |
| D. | Tranquilisers |
| Answer» B. Plasticisers for unsaturated polyesters | |
| 224. |
Paper pulp produced by Kraft/sulphate process is__________________ ? |
| A. | Bleached easily |
| B. | Dull white in color |
| C. | Strong fibrous |
| D. | Dark colored |
| Answer» D. Dark colored | |
| 225. |
______________ paper is used in the manufacture of newsprint paper ? |
| A. | Ground-wood |
| B. | Board |
| C. | Tissue |
| D. | Wrapping |
| Answer» B. Board | |
| 226. |
Paper grade bamboo contains about _______________ percent cellulose ? |
| A. | 5 |
| B. | 20 |
| C. | 40 |
| D. | 60 |
| Answer» B. 20 | |
| 227. |
Oxygen is produced by fractionation of air using _____________ process? |
| A. | Linde’s |
| B. | Claude’s |
| C. | Either A. or B. |
| D. | None of these |
| Answer» D. None of these | |
| 228. |
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about ______________ °C ? |
| A. | -83 |
| B. | -183 |
| C. | -196 |
| D. | -218 |
| Answer» C. -196 | |
| 229. |
Oxidation of SO2 to SO3 is favoured by______________________? |
| A. | Low temperature and low pressure |
| B. | Low temperature and high pressure |
| C. | High temperature and low pressure |
| D. | High temperature and high pressure |
| Answer» C. High temperature and low pressure | |
| 230. |
Oxidation of ortho-xylene in presence of ______________ catalyst is done to produce phthalic anhydride on commercial scale ? |
| A. | Nickel |
| B. | Vanadium |
| C. | Alumina |
| D. | Iron |
| Answer» C. Alumina | |
| 231. |
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the _____________ process? |
| A. | Mechanical |
| B. | Sulphate/Kraft |
| C. | Sulphite |
| D. | Neutral sulphite semi-chemical |
| Answer» E. | |
| 232. |
Ore concentration by froth floatation utilises the ______________ of ore particles ? |
| A. | Density difference |
| B. | Wetting characteristics |
| C. | Terminal velocities |
| D. | None of these |
| Answer» C. Terminal velocities | |
| 233. |
Ordinary glass is not a/an_________________? |
| A. | Amorphous isotropic material |
| B. | Supercooled liquid |
| C. | Material with sharp definite melting point |
| D. | Electrical insulator |
| Answer» D. Electrical insulator | |
| 234. |
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to_________________? |
| A. | Adjust the pH of the syrup |
| B. | Remove the coloring matter from the syrup |
| C. | Reduce the viscosity of the syrup |
| D. | Improve the rate of crystallisation of sugar |
| Answer» B. Remove the coloring matter from the syrup | |
| 235. |
Oleum produces fumes of_____________________? |
| A. | SO2 |
| B. | H2SO4 |
| C. | SO3 |
| D. | SO2 + H2SO4 |
| Answer» D. SO2 + H2SO4 | |
| 236. |
Oils are partially hydrogenated (not fully) to manufacture Vanaspati , because fully saturated solidified oils ? |
| A. | Cause cholesterol build up and blood clotting |
| B. | Are prone to rancid oxidation |
| C. | Always contain some amount of nickel (as their complete removal is very difficult) |
| D. | Have affinity to retain harmful sulphur compounds |
| Answer» B. Are prone to rancid oxidation | |
| 237. |
Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils________________? |
| A. | Cause cholesterol build up and blood clotting |
| B. | Are prone to rancid oxidation |
| C. | Always contain some amount of nickel (as their complete removal is very difficult) |
| D. | Have affinity to retain harmful sulphur compounds |
| Answer» B. Are prone to rancid oxidation | |
| 238. |
Oils and fats are converted to soap in a process called _________________? |
| A. | Hydrogenation |
| B. | Esterification |
| C. | Saponification |
| D. | None of these |
| Answer» D. None of these | |
| 239. |
Oil produced by solvent extraction________________? |
| A. | Has low free fatty acid content |
| B. | Is odourless |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» E. | |
| 240. |
____________________ of rubber decreases after its vulcanisation? |
| A. | Resistance to the action of organic solvent |
| B. | Tackiness |
| C. | Maximum service temperature |
| D. | Tensile strength |
| Answer» C. Maximum service temperature | |
| 241. |
______________________ of quicklime produces slaked lime ? |
| A. | Hydration |
| B. | Dehydration |
| C. | Hydrogenation |
| D. | None of these |
| Answer» B. Dehydration | |
| 242. |
Nylon-66 is so named because the____________________? |
| A. | Average degree of polymerisation of the polymer is 1966 |
| B. | Number of carbon atoms between two nitrogen atoms are 6 |
| C. | Number of nitrogen atoms between two carbon atoms are 6 |
| D. | Polymer was first synthesised in 1966 |
| Answer» B. Number of carbon atoms between two nitrogen atoms are 6 | |
| 243. |
Nylon-66 is manufactured from____________________? |
| A. | Hexamethylene diamine and adipic acid |
| B. | Hexamethylene diamine and Maleic anhydride |
| C. | Caprolactam |
| D. | Dimethyl terephthalate and ethylene glycol |
| Answer» B. Hexamethylene diamine and Maleic anhydride | |
| 244. |
Nylon-6 is manufactured from ______________________ ? |
| A. | Caprolactam |
| B. | Hexamethylene diamine and adipic acid |
| C. | Hexamethylene diamine and Maleic anhydride |
| D. | Hexamethylene diamine and Sebacic acid |
| Answer» B. Hexamethylene diamine and adipic acid | |
| 245. |
Nylon-6 is a__________________? |
| A. | Polyamide |
| B. | Thermosetting resin |
| C. | Polyester |
| D. | None of these |
| Answer» B. Thermosetting resin | |
| 246. |
Nylon-6 as compared to Nylon-66 is having higher___________________? |
| A. | Hardness |
| B. | Abrasion/resistance |
| C. | Melting point |
| D. | None of these |
| Answer» E. | |
| 247. |
Nitrogen is an essential component of ____________________? |
| A. | Mineral salts |
| B. | Carbohydrates |
| C. | Fats |
| D. | Proteins |
| Answer» E. | |
| 248. |
Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and___________________? |
| A. | Sulphuric acid |
| B. | Phosphoric acid |
| C. | Hydrochloric acid |
| D. | Hydrofluoric acid |
| Answer» B. Phosphoric acid | |
| 249. |
Nitrile rubber is produced by the polymerisation of__________________? |
| A. | Acrylonitrile and butadiene |
| B. | Acrylonitrile and styrene |
| C. | Isobutylene and isoprene |
| D. | None of these |
| Answer» B. Acrylonitrile and styrene | |
| 250. |
Nitric acid is not used in the manufacture of______________________? |
| A. | Detergents |
| B. | Fertilisers |
| C. | Aqua regia |
| D. | Explosives |
| Answer» B. Fertilisers | |