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.
| 151. |
Resistance to fusion of the refractory under a steady rising temperature condition is called ____________________ ? |
| A. | Spalling |
| B. | Refractoriness |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. & B. | |
| 152. |
Removal of dirt/soil by soaps or detergent does not involve the _______________ of soil ? |
| A. | Emulsification |
| B. | Dispersion |
| C. | Precipitation |
| D. | Wetting |
| Answer» D. Wetting | |
| 153. |
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the _________________? |
| A. | L.D. converter |
| B. | Blast furnace |
| C. | Rotary kiln |
| D. | Recuperator |
| Answer» E. | |
| 154. |
Refractory bricks burnt at very high temperature have got______________? |
| A. | Greater resistance to corrosion by slags |
| B. | Less resistance to corrosion by slags |
| C. | High spalling tendency |
| D. | None of these |
| Answer» B. Less resistance to corrosion by slags | |
| 155. |
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces ________________? |
| A. | Nylon-6 |
| B. | Dacron |
| C. | Polyester |
| D. | PVC |
| Answer» C. Polyester | |
| 156. |
Reaction of calcium carbide with water produces a gas, which is used_________________? |
| A. | As an illuminant |
| B. | For metal cutting/welding |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 157. |
Reaction of an alcohol with organic acid is called the ________________ reaction? |
| A. | Saponification |
| B. | Esterification |
| C. | Neutralisation |
| D. | Acidification |
| Answer» C. Neutralisation | |
| 158. |
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically____________________? |
| A. | Cyclo trimethylene trinitramine |
| B. | Trinitro resorcinol |
| C. | Cyclo tetramethylene tetranitramine |
| D. | Trinitrobenzene |
| Answer» B. Trinitro resorcinol | |
| 159. |
Raw materials used for producing ________________ cement does not contain iron oxide? |
| A. | Waterproof |
| B. | Slag |
| C. | White |
| D. | Pozzolan |
| Answer» D. Pozzolan | |
| 160. |
Raw materials required for the manufacture of __________________ is acetylene and hydrochloric acid? |
| A. | Phthalic anhydride |
| B. | Vinyl chloride |
| C. | Maleic anhydride |
| D. | Dacron |
| Answer» C. Maleic anhydride | |
| 161. |
Rancidity of the fatty oil can be reduced by its__________________? |
| A. | Decoloration |
| B. | Hydrogenation |
| C. | Oxidation |
| D. | Purification |
| Answer» C. Oxidation | |
| 162. |
Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about _____________ °C ? |
| A. | -53 |
| B. | -103 |
| C. | -183 |
| D. | -196 |
| Answer» D. -196 | |
| 163. |
Pure rectified spirit contains about _________________ percent alcohol? |
| A. | 45 |
| B. | 70 |
| C. | 95 |
| D. | 99.5 |
| Answer» D. 99.5 | |
| 164. |
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as____________________? |
| A. | Bakelite |
| B. | Neoprene |
| C. | Teflon |
| D. | Nylon-66 |
| Answer» D. Nylon-66 | |
| 165. |
Prussian blue is chemically represented by__________________? |
| A. | FeO.TiO2 |
| B. | Ca SO4 . 2H2O |
| C. | Fe4 [Fe (CN6)3] |
| D. | AlF3 . 3NaF |
| Answer» D. AlF3 . 3NaF | |
| 166. |
Production of one ton of dry paper pulp requires about ___________________ tons of bamboo or wood? |
| A. | 1 |
| B. | 2.5 |
| C. | 5 |
| D. | 10 |
| Answer» C. 5 | |
| 167. |
Production of one ton of cement requires about _______________ tons of limestone ? |
| A. | 0.6 |
| B. | 1.2 |
| C. | 2.2 |
| D. | 3.8 |
| Answer» C. 2.2 | |
| 168. |
Production of alcohol by fermentation of molasses is a/an _____________ process? |
| A. | Anaerobic |
| B. | Aerobic |
| C. | Endothermic |
| D. | Both B. and C. |
| Answer» C. Endothermic | |
| 169. |
Producer gas consists mainly of________________________? |
| A. | CO, CO2 N2, H2 |
| B. | CO, H2 |
| C. | H2, CH4 |
| D. | C2H2, CO2, H2 |
| Answer» B. CO, H2 | |
| 170. |
____________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia ? |
| A. | Solvay |
| B. | Ostwald’s |
| C. | Haber’s |
| D. | None of these |
| Answer» C. Haber’s | |
| 171. |
______________ process is used for the manufacture of sodium carbonate by ammonia soda process? |
| A. | Ostwald’s |
| B. | Bosch |
| C. | Solvay |
| D. | Haber’s |
| Answer» D. Haber’s | |
| 172. |
____________________ process is used for producing soda ash? |
| A. | Chamber |
| B. | Chance |
| C. | Tromp |
| D. | Solvay |
| Answer» E. | |
| 173. |
Process conditions in fermentator used for production of penicillin is____________________? |
| A. | 25°C, 2 atm |
| B. | 50°C, l0 atm |
| C. | 30°C, 200 mm Hg (absolute) |
| D. | 90°C, 45 atm |
| Answer» B. 50°C, l0 atm | |
| 174. |
Presence of sodium tripolyphosphate (an additive) in synthetic detergent___________________? |
| A. | Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions) |
| B. | Inhibits its corrosive effects |
| C. | Does not allow redeposition of dirt on the cleaned surface |
| D. | None of these |
| Answer» B. Inhibits its corrosive effects | |
| 175. |
Presence of H2S in raw water (to be chlorinated) results in the_____________________? |
| A. | Reduced softening capacity of zeolite |
| B. | Increased dosage of chlorine to provide a disinfecting residual in the water |
| C. | Easy removal of its hardness |
| D. | None of these |
| Answer» C. Easy removal of its hardness | |
| 176. |
Presence of carbonaceous matter in the sewage____________________? |
| A. | Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures |
| B. | Reduces sulphate ions to sulphides causing obnoxious smell |
| C. | Increases the quantity of chlorine used for its purification |
| D. | All A, B. and C. |
| Answer» E. | |
| 177. |
Potassium is kept & transported under ___________________ ? |
| A. | Water |
| B. | Liquid ammonia |
| C. | Kerosene oil |
| D. | Alcohol |
| Answer» D. Alcohol | |
| 178. |
Portland cement consists mainly of__________________? |
| A. | CaO & SiO2 |
| B. | SiO2 & Al2O3 |
| C. | CaO & Al2O3 |
| D. | CaO & Fe2O3 |
| Answer» B. SiO2 & Al2O3 | |
| 179. |
Polyvinyl chloride (PVC) is____________________? |
| A. | A thermosetting material |
| B. | A condensation polymerisation product |
| C. | Made by employing emulsion polymerisation |
| D. | None of these |
| Answer» D. None of these | |
| 180. |
Polymethyl methacrylate (PMMA) is known as ____________________? |
| A. | Bakelite |
| B. | Teflon |
| C. | Perspex |
| D. | Nylon-6 |
| Answer» D. Nylon-6 | |
| 181. |
Polythene is a/an ______________ polymerisation product? |
| A. | Addition |
| B. | Condensation |
| C. | Thermosetting |
| D. | None of these |
| Answer» B. Condensation | |
| 182. |
Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called___________________? |
| A. | Polyurethane |
| B. | Silicone |
| C. | Teflon |
| D. | Epoxy resin |
| Answer» D. Epoxy resin | |
| 183. |
Poly Vinyl Chloride (P.V.C.) is a ______________ material ? |
| A. | Thermosetting |
| B. | Thermoplastic |
| C. | Fibrous |
| D. | Chemically active |
| Answer» C. Fibrous | |
| 184. |
Polycaprolactam is commercially known as___________________? |
| A. | Nylon-6 |
| B. | Nylon-66 |
| C. | Dacron |
| D. | Rayon |
| Answer» B. Nylon-66 | |
| 185. |
Poly Tetrafluoroethylene (P.T.F.E.) is known as___________________? |
| A. | Bakelite |
| B. | Teflon |
| C. | Celluloid |
| D. | Dacron |
| Answer» C. Celluloid | |
| 186. |
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like_________________? |
| A. | High cost |
| B. | Fragile nature |
| C. | Easy poisoning tendency |
| D. | All A, B. and C. |
| Answer» E. | |
| 187. |
Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of_________________? |
| A. | Carbon |
| B. | Arsenic |
| C. | Lead |
| D. | Sulphur |
| Answer» C. Lead | |
| 188. |
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 resins |
| D. | All A, B. and C. |
| Answer» E. | |
| 189. |
Plasticisers are added to paints to______________________? |
| A. | Make it corrosion resistant |
| B. | Make glossy surface |
| C. | Give elasticity & prevent cracking of the film |
| D. | Increase atmospheric oxidation |
| Answer» D. Increase atmospheric oxidation | |
| 190. |
Plaster of Paris is __________________? |
| A. | CaSO4.½H2O |
| B. | Used for setting of broken bones |
| C. | Both A. and B. |
| D. | Same as gypsum |
| Answer» D. Same as gypsum | |
| 191. |
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because__________________? |
| A. | Its calorific value is very less |
| B. | Tar neutralises the residual acids present in pitch |
| C. | It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop |
| D. | All A, B. and C. |
| Answer» D. All A, B. and C. | |
| 192. |
Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________? |
| A. | Hematite |
| B. | Magnetite |
| C. | Siderite |
| D. | Chalcopyrite |
| Answer» B. Magnetite | |
| 193. |
Pick out the wrong statement pertaining to the soap manufacture? |
| A. | Transparent soaps are made by cold process |
| B. | Organic pigments are used as colouring materials in the soap manufacture |
| C. | Both laundry as well as toilet soaps are manufactured by hot process |
| D. | Colourless rosin is used in the manufacture of laundry soaps |
| Answer» B. Organic pigments are used as colouring materials in the soap manufacture | |
| 194. |
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have___________________? |
| A. | High electrical insulation properties |
| B. | Sharp melting points |
| C. | Low co-efficient of thermal expansion |
| D. | Compressive strength much greater than their tensile strengths |
| Answer» C. Low co-efficient of thermal expansion | |
| 195. |
Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________? |
| A. | Decreases with decrease of thickness of the flakes |
| B. | Increases with the increasing flake size keeping the flake thickness constant |
| C. | Increases considerably with the rise of temperature |
| D. | Decreases as the moisture content of flakes increases |
| Answer» E. | |
| 196. |
Pick out the wrong statement pertaining to nitric acid ? |
| A. | About 90% of nitric acid is manufactured by Ostwald’s process |
| B. | It is a strong mono basic acid which reacts with almost all the metals except noble metals |
| C. | Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2) |
| D. | Arc process of nitric acid manufacture is economical as compared to Ostwald’s process |
| Answer» E. | |
| 197. |
Pick out the wrong statement. Iodine value of an oil or fat is________________? |
| A. | The number of grams of iodine taken up by 100 gm of oil or fat |
| B. | A measure of its unsaturation |
| C. | Helpful in findings its adulteration & its suitability for making soap |
| D. | Independent of the type of oil, whether it is drying or non-drying |
| Answer» E. | |
| 198. |
Pick out the true statement pertaining to water treatment ? |
| A. | Slow sand filters can remove colour completely |
| B. | Activated carbon can be used for taste & odour control without subsequent filtration |
| C. | Application of activated carbon reduces the temporary hardness of water |
| D. | Normally, the turbidity is removed by adding a coagulant prior to sedimentation |
| Answer» E. | |
| 199. |
Pick out the exothermic reaction out of the following ? |
| A. | C + H2O = CO + H2 |
| B. | CaC2 + H2O = Ca(OH)2 + C2H2 |
| C. | MgCO3 = MgO + CO2 |
| D. | All (A), B. and (C) |
| Answer» C. MgCO3 = MgO + CO2 | |
| 200. |
Pick out the false statement pertaining to water treatment ? |
| A. | Aeration of water is effective in CO2 removal |
| B. | The zeolite water softening process reduces the hardness of water by not more than 50% |
| C. | Sodium sulphate or sodium carbonate do not cause hardness in water |
| D. | Water with pH value less than 7, is acidic |
| Answer» C. Sodium sulphate or sodium carbonate do not cause hardness in water | |