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.
| 401. |
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. | |
| 402. |
Pure rectified spirit contains about __________ percent alcohol. |
| A. | 45 |
| B. | 70 |
| C. | 95 |
| D. | 99.5 |
| Answer» D. 99.5 | |
| 403. |
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at |
| A. | 1 atm & 100°C |
| B. | 5 atm & 275°C |
| C. | 100 atm & 500°C |
| D. | 50 atm & 1000°C |
| Answer» C. 100 atm & 500¬∞C | |
| 404. |
__________ is a polysacchride. |
| A. | Maltose |
| B. | Starch |
| C. | Sucrose |
| D. | Glucose |
| Answer» C. Sucrose | |
| 405. |
A mineral is termed as 'ore', if |
| A. | a metal can be economically extracted from it. |
| B. | it contains ‚â• 40% metal. |
| C. | the metal present in it is costly. |
| D. | all (a), (b) and (c). |
| Answer» B. it contains ‚â• 40% metal. | |
| 406. |
Which of the following, when pyrolysed, produces perchloro-ethylene ? |
| A. | Ethylene dichloride |
| B. | Chlorobenzene |
| C. | Carbon tetrachloride |
| D. | Chlorinated paraffin |
| Answer» D. Chlorinated paraffin | |
| 407. |
__________ are added in lacquers to remove film brittleness and to improve adhereness. |
| A. | Film forming materials |
| B. | Plasticisers |
| C. | Diluents |
| D. | Solvents |
| Answer» C. Diluents | |
| 408. |
Drinking (potable) water treatment does not involve |
| A. | coagulation |
| B. | sedimentation |
| C. | softening |
| D. | disinfection |
| Answer» D. disinfection | |
| 409. |
The drug used in contraceptives is |
| A. | sulphadizene |
| B. | mestranol |
| C. | methyl salicylate |
| D. | pencillin |
| Answer» C. methyl salicylate | |
| 410. |
CaSO4 .H2O is known as |
| A. | blue vitriol |
| B. | plaster of Paris |
| C. | gypsum |
| D. | zeolite |
| Answer» C. gypsum | |
| 411. |
Fusion of limestone and __________ produces high alumina cement. |
| A. | sand |
| B. | bauxite |
| C. | quicklime |
| D. | calcite |
| Answer» C. quicklime | |
| 412. |
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction. |
| A. | exothermic |
| B. | endothermic |
| C. | catalytic |
| D. | autocatalytic |
| Answer» C. catalytic | |
| 413. |
Which of the following is a detergent ? |
| A. | Fatty alcohol |
| B. | Alkyl benzene sulphonate (ABS) |
| C. | Fatty acids |
| D. | Methylene chloride |
| Answer» C. Fatty acids | |
| 414. |
Which of the following paper does not require a filler during manufacture ? |
| A. | Bond paper |
| B. | Writing paper |
| C. | Blotting paper |
| D. | Coloured paper |
| Answer» D. Coloured paper | |
| 415. |
Styrene is produced from ethyl benzene by the process of |
| A. | dehydrogenation |
| B. | oxidation |
| C. | alkylation |
| D. | dehydration |
| Answer» B. oxidation | |
| 416. |
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of |
| A. | callagen |
| B. | tannin |
| C. | molasses |
| D. | carbohydrate |
| Answer» B. tannin | |
| 417. |
Polycaprolactum is commercially known as |
| A. | nylon-6 |
| B. | nylon-66 |
| C. | dacron |
| D. | rayon |
| Answer» B. nylon-66 | |
| 418. |
Pick out the endothermic reaction out of the following. |
| A. | C+O2 = CO |
| B. | CO + 3H2 = CH4 + H2O |
| C. | CaCO3 = CaO + CO2 |
| D. | CO +O2 = CO2 |
| Answer» D. CO +O2 = CO2 | |
| 419. |
Bleaching action of bleaching powder is due to its __________ properties. |
| A. | reducing |
| B. | oxidising |
| C. | disinfecting |
| D. | none of these |
| Answer» C. disinfecting | |
| 420. |
Free alkali in a toilet soap is __________ that in a laundary shop. |
| A. | less than |
| B. | more than |
| C. | same |
| D. | none of these |
| Answer» B. more than | |
| 421. |
Celluloid is chemically |
| A. | cellulose acetate |
| B. | regenerated cellulose |
| C. | cellulose nitrate |
| D. | cellulose acetate butyrate |
| Answer» D. cellulose acetate butyrate | |
| 422. |
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. | |
| 423. |
Fusel oil is a/an |
| A. | essential oil. |
| B. | extract from medicinal herbs. |
| C. | mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses). |
| D. | none of these. |
| Answer» D. none of these. | |
| 424. |
Air used in aerobic fermentation must be sterilized, otherwise the |
| A. | recovery of product will be difficult. |
| B. | contamination of pure culture would result. |
| C. | uniformity of product cannot be achieved. |
| D. | none of these. |
| Answer» C. uniformity of product cannot be achieved. | |
| 425. |
The biochemical treatment applied to sewage effluents is a process of |
| A. | dehydration |
| B. | reduction |
| C. | oxidation |
| D. | polymerisation |
| Answer» D. polymerisation | |
| 426. |
Plaster of Paris is |
| A. | CaSO4.H2O |
| B. | used for setting of broken bones |
| C. | both (a) and (b) |
| D. | same as gypsum |
| Answer» D. same as gypsum | |
| 427. |
Saponification value/number of an oil or fat is a measure of its |
| A. | fatty acid content. |
| B. | degree of unsaturation of the fatty acids present in it. |
| C. | average molecular weight. |
| D. | insoluble fatty acid content. |
| Answer» D. insoluble fatty acid content. | |
| 428. |
Anion exchanger is regenerated usually with |
| A. | NaOH |
| B. | H2SO4 |
| C. | hydrazine |
| D. | alum solution |
| Answer» B. H2SO4 | |
| 429. |
Which oil is preferred for paint manufacture ? |
| A. | Drying oil |
| B. | Non-drying oil |
| C. | Semi-drying oil |
| D. | Saturated oil |
| Answer» B. Non-drying oil | |
| 430. |
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 | |
| 431. |
Concentration of sulphide ores is done usually by |
| A. | roasting |
| B. | smelting |
| C. | froth floatation |
| D. | electro magnetic separation |
| Answer» D. electro magnetic separation | |
| 432. |
Fermentator temperature during production of alcohol from molasses is around __________ °C.$ |
| A. | 5 |
| B. | 30 |
| C. | 150 |
| D. | 300 |
| Answer» C. 150 | |
| 433. |
__________ nature of hypo (sodium thiosulphate) makes it useful in photography. |
| A. | Oxidising |
| B. | Reducing |
| C. | Complex forming |
| D. | Photochemical |
| Answer» D. Photochemical | |
| 434. |
Nickel is not used as a catalyst in the __________ reaction. |
| A. | shift conversion |
| B. | oil hydrogenation |
| C. | steaming reforming of naphtha |
| D. | ammonia cracking/dissociation |
| Answer» B. oil hydrogenation | |
| 435. |
Frasch process is for |
| A. | making oxygen |
| B. | producing helium |
| C. | mining sulphur |
| D. | making nitrogen |
| Answer» D. making nitrogen | |
| 436. |
Electric bulbs are made of __________ glass. |
| A. | jena |
| B. | flint |
| C. | crookes |
| D. | pyrex |
| Answer» C. crookes | |
| 437. |
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. |
| A. | Pyrex |
| B. | Soda lime |
| C. | Lead |
| D. | High silica |
| Answer» B. Soda lime | |
| 438. |
Main constituents of portland cement are calcium aluminate and |
| A. | gypsum |
| B. | silicates |
| C. | sodium silicate |
| D. | carbonates |
| Answer» C. sodium silicate | |
| 439. |
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. | |
| 440. |
Roasting of metallurgical ores is done mainly to |
| A. | dehydrate it. |
| B. | sinter the ore. |
| C. | remove CO2 & H2O. |
| D. | remove arsenic & sulphur. |
| Answer» E. | |
| 441. |
Penicillin is separated from fermented broth by |
| A. | extraction with amyl or butyl acetate. |
| B. | ternery azeotropic distillation. |
| C. | evaporation in calendria. |
| D. | extractive distillation. |
| Answer» B. ternery azeotropic distillation. | |
| 442. |
Production of alcohol by fermentation of molasses is an __________ process. |
| A. | anaerobic |
| B. | aerobic |
| C. | endothermic |
| D. | both(b) and (c) |
| Answer» C. endothermic | |
| 443. |
The temperature in the calcium carbide furnace is __________ °C.$ |
| A. | 200-300 |
| B. | 700-850 |
| C. | 2000-2200 |
| D. | 4000-4500 |
| Answer» D. 4000-4500 | |
| 444. |
Rotary kiln is not involved in the production of |
| A. | cement |
| B. | lime from limestone |
| C. | slaked lime from quick lime |
| D. | none of these |
| Answer» D. none of these | |
| 445. |
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of |
| A. | calcium sulphate |
| B. | sodium chloride |
| C. | sodium sulphate |
| D. | magnesium chloride. |
| Answer» C. sodium sulphate | |
| 446. |
Which of the following is not an insecticide? |
| A. | Hydrocyanic acid |
| B. | Nicotine |
| C. | Sodium flouride |
| D. | Hexane |
| Answer» E. | |
| 447. |
Use of hydrated lime in water treatment |
| A. | before filtration, reduces the bacterial load on filters. |
| B. | after filtration, combats the corrosive-ness of water due to the presence of O2 & CO2. |
| C. | is to adjust the pH value. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 448. |
Fourdrinier machine is used in the manufacture of |
| A. | nylon-6 |
| B. | paper |
| C. | antibiotics |
| D. | sugar |
| Answer» C. antibiotics | |
| 449. |
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ? |
| A. | Slag cement |
| B. | Glasses |
| C. | Porcelain/Potteries |
| D. | Teflon |
| Answer» E. | |
| 450. |
The main component of pyrex glass is |
| A. | zinc |
| B. | lead |
| C. | boron |
| D. | celenium |
| Answer» C. boron | |