MCQOPTIONS
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MCQOPTIONS
This section includes 595 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Which of the following is a constituent of vinegar ? |
| A. | Around 10% alcohol |
| B. | Around 1% acetic acid |
| C. | Both (a) and (b) |
| D. | Neither (a) nor (b) |
| Answer» D. Neither (a) nor (b) | |
| 252. |
Starting material for the commercial production of ethyl alcohol in India is |
| A. | rice |
| B. | molasses |
| C. | fruit of Mahua tree |
| D. | maize |
| Answer» C. fruit of Mahua tree | |
| 253. |
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. | |
| 254. |
__________ glass is used for the manufacture of optical glass. |
| A. | Pyrex |
| B. | Soda |
| C. | Flint |
| D. | Crooke's |
| Answer» D. Crooke's | |
| 255. |
Boiling of water containing temporary hardness produces |
| A. | CO2 |
| B. | CaSO4 |
| C. | CaHCO3 |
| D. | none of these |
| Answer» B. CaSO4 | |
| 256. |
__________ 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 | |
| 257. |
Which glass is usually used in optical work? |
| A. | Lead glass |
| B. | High silica (borosilicate) glass |
| C. | Photo-sensitive glass |
| D. | Fibre glass |
| Answer» D. Fibre glass | |
| 258. |
Sodium carbonate (soda ash) is not used in the manufacture of |
| A. | fire extinguishers |
| B. | sugar |
| C. | baking powder |
| D. | detergents |
| Answer» E. | |
| 259. |
Absorption of SO3 in 97% H2SO4 is |
| A. | exothermic |
| B. | endothermic |
| C. | not possible |
| D. | none of these |
| Answer» B. endothermic | |
| 260. |
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 | |
| 261. |
Comparing sulphate process with sulphite process, we find that __________ in the later. |
| A. | both temperature & pressure in the former is less than that |
| B. | both temperature & pressure in the former is more than that |
| C. | temperature is more in the former whereas pressure is more |
| D. | pressure is more in the former whereas temperature is less |
| Answer» C. temperature is more in the former whereas pressure is more | |
| 262. |
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? |
| A. | Sodium silicate |
| B. | Sodium borate |
| C. | Sodium tripolyphosphate (STPP) |
| D. | Caustic soda |
| Answer» C. Sodium tripolyphosphate (STPP) | |
| 263. |
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) | |
| 264. |
Diaphragm electrolytic cell as compared to mercury electrolytic cell |
| A. | produces 70% NaOH solution. |
| B. | requires less specific power consumption for the production of chlorine. |
| C. | requires lesser investment for similar capacity. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 265. |
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of |
| A. | nitric acid |
| B. | hydrochloric acid |
| C. | methyl alcohol |
| D. | formic acid |
| Answer» B. hydrochloric acid | |
| 266. |
Blue colour is imparted to glass by the addition of |
| A. | FeSO4 |
| B. | PbO |
| C. | CaO |
| D. | NaOH |
| Answer» D. NaOH | |
| 267. |
Industrial production of chloroform requires acetone and |
| A. | phosgene |
| B. | calcium hypochlorite |
| C. | chlorine |
| D. | ammonium chloride |
| Answer» C. chlorine | |
| 268. |
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. | trinitro benzene. |
| Answer» B. trinitro resorcinol. | |
| 269. |
Bromine content in sea water may be around __________ ppm. |
| A. | 70 |
| B. | 640 |
| C. | 1875 |
| D. | 2500 |
| Answer» B. 640 | |
| 270. |
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system ) |
| A. | P |
| B. | P |
| C. | P2 |
| D. | 1/P |
| Answer» C. P2 | |
| 271. |
Conversion of CO to CO2 by steam in presence of a catalyst is called |
| A. | steam reforming. |
| B. | shift conversion. |
| C. | steam gasification. |
| D. | none of these. |
| Answer» C. steam gasification. | |
| 272. |
Hydrogenation of oil does not |
| A. | remove double bonds. |
| B. | raise its melting point. |
| C. | improve its resistance to oxidation. |
| D. | none of these. |
| Answer» E. | |
| 273. |
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on |
| A. | slaked lime |
| B. | soda lime |
| C. | calcium perchlorate |
| D. | none of these |
| Answer» B. soda lime | |
| 274. |
Sudden temperature fluctuation does not affect pyrex glass, because of its |
| A. | low co-efficient of expansion. |
| B. | high co-efficient of expansion. |
| C. | high melting point. |
| D. | both (b) and (c). |
| Answer» B. high co-efficient of expansion. | |
| 275. |
Parathion and Malathion are |
| A. | pesticides. |
| B. | plasticisers for unsaturated polysters. |
| C. | pain-relieving drugs (analgesic). |
| D. | tranquilisers. |
| Answer» B. plasticisers for unsaturated polysters. | |
| 276. |
99.5% purity oxygen is used in |
| A. | cutting and welding by oxy-acetylene flame. |
| B. | hospitals for medicinal purposes. |
| C. | gas masks and artificial breathing apparatus. |
| D. | all (a), (b), and (c). |
| Answer» E. | |
| 277. |
Silicon carbide is a/an |
| A. | adhesive |
| B. | abrasive |
| C. | type of glass |
| D. | brittle material |
| Answer» C. type of glass | |
| 278. |
Glauber's salt is chemically |
| A. | calcium sulphate |
| B. | potassium sulphate |
| C. | potassium chlorate |
| D. | none of these |
| Answer» E. | |
| 279. |
Sulphuric acid completely saturated with sulphur trioxide is called |
| A. | concentrated sulphuric acid. |
| B. | oleum. |
| C. | sulphurous acid. |
| D. | dilute sulphuric acid. |
| Answer» B. oleum. | |
| 280. |
Commonly used glass is known as the __________ glass. |
| A. | flint |
| B. | hard |
| C. | pyrex |
| D. | soda |
| Answer» E. | |
| 281. |
Which of the following is not required in the manufacture of soda ash by Solvay process ? |
| A. | Ammonia |
| B. | Limestone |
| C. | Nitric acid |
| D. | None of these |
| Answer» D. None of these | |
| 282. |
Isopropyl benzene produced by alkylation of benzene with propylene is known as |
| A. | neoprene |
| B. | cumene |
| C. | gelatin |
| D. | mercaptans |
| Answer» C. gelatin | |
| 283. |
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 laundary as well as toilet soaps are manufactured by hot process. |
| D. | Colourless rosin is used in the manufacture of laundary soaps. |
| Answer» B. Organic pigments are used as colouring materials in the soap manufacture. | |
| 284. |
Dichloro diphenyl __________ is the full form of DDT (an insecticide). |
| A. | tetrachloroethane |
| B. | trichloroethane |
| C. | tetrachloromethane |
| D. | trichloromethane |
| Answer» C. tetrachloromethane | |
| 285. |
Hydrodenation of vegetable oils is a/an __________ reaction. |
| A. | endothermic |
| B. | autocatalytic |
| C. | exothermic |
| D. | homogenous |
| Answer» D. homogenous | |
| 286. |
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively |
| A. | V2O5 & Cr2O3. |
| B. | oxides of nitrogen & Cr2O3. |
| C. | V2O5 on a porous carrier & oxides of nitrogen. |
| D. | oxides of nitrogen & V2O5 on a porous carrier. |
| Answer» E. | |
| 287. |
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of |
| A. | 4 kgf/cm2 & 500°C. |
| B. | 10 kgf/cm2 & 1000°C. |
| C. | 40 kg/cm2 & 200°C. |
| D. | 100 kgi/cm2 & 500°C. |
| Answer» B. 10 kgf/cm2 & 1000¬∞C. | |
| 288. |
Bleaching of paper pulp is done with |
| A. | activated clay |
| B. | bromine |
| C. | chlorine or chlorine dioxide |
| D. | magnesium sulphite |
| Answer» D. magnesium sulphite | |
| 289. |
Sea water contains about __________ ppm of bromine. |
| A. | 5 |
| B. | 70 |
| C. | 500 |
| D. | 1700 |
| Answer» C. 500 | |
| 290. |
Alum is commercially produced from |
| A. | gypsum |
| B. | feldspar |
| C. | galena |
| D. | bauxite |
| Answer» E. | |
| 291. |
Which of the following is a constituent of coffee ? |
| A. | Caffeine |
| B. | Nicotine |
| C. | Calgon |
| D. | Lignin |
| Answer» B. Nicotine | |
| 292. |
Pencillin is made employing __________ fermentation process. |
| A. | continuous |
| B. | aerobic batch |
| C. | anaerobic batch |
| D. | none of these |
| Answer» C. anaerobic batch | |
| 293. |
Fat splitting catalyst is |
| A. | CaCO3 |
| B. | ZnO |
| C. | Al2O3 |
| D. | Fe |
| Answer» C. Al2O3 | |
| 294. |
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ? |
| A. | NH3 |
| B. | NaCl |
| C. | CaO |
| D. | Coke |
| Answer» B. NaCl | |
| 295. |
Which of the following has sodium bicarbonate as its main constituent ? |
| A. | Baking soda |
| B. | Baking powder |
| C. | Washing soda |
| D. | none of these |
| Answer» C. Washing soda | |
| 296. |
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces |
| A. | nylon-6 |
| B. | dacron |
| C. | polyester |
| D. | PVC |
| Answer» C. polyester | |
| 297. |
Percentage of alcohol in beer may be around __________ percent. |
| A. | 43679 |
| B. | 18-23 |
| C. | 27-32 |
| D. | 43556 |
| Answer» B. 18-23 | |
| 298. |
Trinitro-toluene (TNT) is |
| A. | used in glycerine manufacture. |
| B. | an explosive. |
| C. | used in dye manufacture. |
| D. | none of these. |
| Answer» C. used in dye manufacture. | |
| 299. |
Catalytic oxidation-dehydrogenation of methyl alcohol produces |
| A. | formaldehyde |
| B. | phenol |
| C. | acetone |
| D. | maleic anhydride |
| Answer» B. phenol | |
| 300. |
Separation of fresh water from sea water can be done by the __________ operation. |
| A. | osmosis |
| B. | reverse osmosis |
| C. | absorption |
| D. | adsorption |
| Answer» C. absorption | |