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.
| 1251. |
A 'unit process' is exemplified by the |
| A. | Distillation |
| B. | Hydrogenation of oils |
| C. | Absorption |
| D. | Humidification |
| Answer» C. Absorption | |
| 1252. |
Le-Blanc process is a primitive process for the manufacture of |
| A. | Caustic soda |
| B. | Soda ash |
| C. | Bromine from sea water |
| D. | Hydrochloric acid |
| Answer» C. Bromine from sea water | |
| 1253. |
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of |
| A. | Nitric acid |
| B. | Sulphuric acid |
| C. | Ammonium sulphate |
| D. | Hydrochloric acid |
| Answer» C. Ammonium sulphate | |
| 1254. |
'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of |
| A. | N₂ & H₂ |
| B. | CO₂ & H₂ |
| C. | CO & H₂ |
| D. | C & H₂ |
| Answer» D. C & H₂ | |
| 1255. |
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 | |
| 1256. |
Phenol is mainly used |
| A. | To produce benzene |
| B. | To produce phenol formaldehyde |
| C. | To produce polyester resin |
| D. | As a plasticiser for unsaturated polyster |
| Answer» C. To produce polyester resin | |
| 1257. |
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 | |
| 1258. |
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 coagulent prior to sedimentation |
| Answer» E. | |
| 1259. |
Argon is the third largest constituent of air (followed by N₂ & O₂). Its percentage by volume in air is |
| A. | 0.14 |
| B. | 0.34 |
| C. | 0.94 |
| D. | 1.4 |
| Answer» D. 1.4 | |
| 1260. |
Cement setting under water employs a/an __________ process. |
| A. | Hydration |
| B. | Decomposition |
| C. | Oxidation |
| D. | Reduction |
| Answer» B. Decomposition | |
| 1261. |
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 | |
| 1262. |
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 | |
| 1263. |
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 | |
| 1264. |
Parathion and Malathion are |
| A. | Pesticides |
| B. | Plasticisers for unsaturated polysters |
| C. | Pain-relieving drugs (analgesic) |
| D. | Tranquilisers |
| Answer» B. Plasticisers for unsaturated polysters | |
| 1265. |
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 | |
| 1266. |
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 | |
| 1267. |
Sea water contains about __________ ppm of bromine. |
| A. | 5 |
| B. | 70 |
| C. | 500 |
| D. | 1700 |
| Answer» C. 500 | |
| 1268. |
Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by |
| A. | Iron-steam reaction |
| B. | Electrolysis of water |
| C. | Steam reforming of naphtha |
| D. | Its cryogenic separation from coke oven gas |
| Answer» B. Electrolysis of water | |
| 1269. |
Phosphoric acid is prepared from |
| A. | Cryolite |
| B. | Chalcopyrite |
| C. | Rock phosphate |
| D. | None of these |
| Answer» D. None of these | |
| 1270. |
The most reactive allotropic form of phosphorus is __________ phosphorus. |
| A. | Red |
| B. | Yellow |
| C. | Violet |
| D. | Black |
| Answer» C. Violet | |
| 1271. |
Absorption of SO₃ in 97% H₂SO₄ is |
| A. | Exothermic |
| B. | Endothermic |
| C. | Not possible |
| D. | None of these |
| Answer» B. Endothermic | |
| 1272. |
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 | |
| 1273. |
Yeast is used in the manufacture of |
| A. | Pencillin |
| B. | Antibiotics |
| C. | Wine |
| D. | Pasteurised milk |
| Answer» D. Pasteurised milk | |
| 1274. |
Fourdrinier machine is used in the manufacture of |
| A. | Nylon-6 |
| B. | Paper |
| C. | Antibiotics |
| D. | Sugar |
| Answer» C. Antibiotics | |
| 1275. |
Mannheim furnace is used in the manufacture of |
| A. | Hydrochloric acid |
| B. | H₂SO₄ by Chamber process |
| C. | Calcium carbide |
| D. | Corundum |
| Answer» B. H₂SO₄ by Chamber process | |
| 1276. |
Chloral is used in the manufacture of |
| A. | DDT |
| B. | BHC |
| C. | Parathion |
| D. | None of these |
| Answer» B. BHC | |
| 1277. |
Zeolite is used in the |
| A. | Water treatment |
| B. | Glass manufacture |
| C. | Hydrogenation of fatty oil as a catalyst |
| D. | Development of exposed photographic plate |
| Answer» B. Glass manufacture | |
| 1278. |
Sugar content in sugarcane on cane basis is about __________ percent by weight. |
| A. | 1 to 5 |
| B. | 5 to 10 |
| C. | 15 to 20 |
| D. | 20 to 30 |
| Answer» C. 15 to 20 | |
| 1279. |
Common salt is generally not produced commonly by __________ method from brine. |
| A. | Freeze drying |
| B. | Electrolytic |
| C. | Solar evaporation |
| D. | Vacuum evaporation |
| Answer» B. Electrolytic | |
| 1280. |
Hydrazine (N₂H₄) is used mainly as a/an |
| A. | Explosive |
| B. | Rocket fuel |
| C. | Detergents additive |
| D. | None of these |
| Answer» C. Detergents additive | |
| 1281. |
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions. |
| A. | Phosphates |
| B. | Chromates |
| C. | Sulphates |
| D. | Bi-carbonates |
| Answer» C. Sulphates | |
| 1282. |
A mixture of chlorine & sodium bromide acts as a/an |
| A. | Insecticides |
| B. | Analgesic drug |
| C. | Fire retardant |
| D. | Hydrogenation catalyst |
| Answer» D. Hydrogenation catalyst | |
| 1283. |
Sucrose is a |
| A. | Monosaccharide |
| B. | Disaccharide |
| C. | Polysaccharide |
| D. | None of these |
| Answer» C. Polysaccharide | |
| 1284. |
In an integrated steel plant, NH3 present in coke oven gas is normally recovered as |
| A. | (NH4)2SO4 |
| B. | NH4Cl |
| C. | (NH4)2 NO3 |
| D. | Liquid NH3 |
| Answer» B. NH4Cl | |
| 1285. |
Nylon-6 as compared to Nylon-66 is having higher |
| A. | Hardness |
| B. | Abrasion/resistance |
| C. | Melting point |
| D. | None of these |
| Answer» E. | |
| 1286. |
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent. |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» B. 25 | |
| 1287. |
Chemical formula of BHC, which is an insecticide is |
| A. | C6H6Cl6 |
| B. | C6Cl6 |
| C. | C6H5Cl |
| D. | C6H4Cl2 |
| Answer» C. C6H5Cl | |
| 1288. |
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. |
| A. | 10 |
| B. | 50 |
| C. | 80 |
| D. | 95 |
| Answer» C. 80 | |
| 1289. |
An oil is converted into fat by its |
| A. | Hydrogenation |
| B. | Hydrolysis |
| C. | Hydrocracking |
| D. | Hydration |
| Answer» B. Hydrolysis | |
| 1290. |
CO & H2 are the constituents of |
| A. | Producer gas |
| B. | Water gas |
| C. | Coke oven gas |
| D. | All (A), (B) and (C) |
| Answer» E. | |
| 1291. |
__________ of quicklime produces slaked lime |
| A. | Hydration |
| B. | Dehydration |
| C. | Hydrogenation |
| D. | None of these |
| Answer» B. Dehydration | |
| 1292. |
20% oleum means that in 100 kg oleum, there are 20 kg of |
| A. | SO3 and 80kg of H2SO4 |
| B. | H2SO4 and 80kg of SO3 |
| C. | SO3 for each 100 kg of H2SO4 |
| D. | None of these |
| Answer» B. H2SO4 and 80kg of SO3 | |
| 1293. |
Dechlorination of treated water is necessary to |
| A. | Remove residual turbidity |
| B. | Reduce the bacterial load on filter |
| C. | Control taste and odour |
| D. | Remove chlorinous taste |
| Answer» E. | |
| 1294. |
Nicotine is |
| A. | A volatile alkaloid |
| B. | Obtained by treating by-products of the tobacco processing industry |
| C. | Both (A) and (B) |
| D. | Neither (A) nor (B) |
| Answer» D. Neither (A) nor (B) | |
| 1295. |
Penicillin is made employing __________ fermentation process. |
| A. | Continuous |
| B. | Aerobic batch |
| C. | Anaerobic batch |
| D. | None of these |
| Answer» C. Anaerobic batch | |
| 1296. |
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. | |
| 1297. |
Fermentation is adversely affected by the |
| A. | Presence of air |
| B. | Absence of air |
| C. | High concentration |
| D. | Presence of ammonium salts |
| Answer» D. Presence of ammonium salts | |
| 1298. |
Lithophane is |
| A. | Explosive |
| B. | White lead |
| C. | Filter aid |
| D. | ZnS (white pigment) |
| Answer» E. | |
| 1299. |
In the Solvay process, the product from the calciner is |
| A. | Light soda ash |
| B. | Dense soda ash |
| C. | Sodium bicarbonate |
| D. | Dehydrated soda ash |
| Answer» B. Dense soda ash | |
| 1300. |
Phenol formaldehyde |
| A. | Employs addition polymerisation |
| B. | Employs condensation polymerisation |
| C. | Is a monomer |
| D. | Is an abrasive material |
| Answer» C. Is a monomer | |