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.
| 451. |
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture. |
| A. | CaO |
| B. | MnO2 |
| C. | ZnO |
| D. | FeS |
| Answer» D. FeS | |
| 452. |
Nylon-6 as compared to Nylon-66 is having higher |
| A. | hardness |
| B. | abrasion/resistance |
| C. | melting point |
| D. | none of these |
| Answer» E. | |
| 453. |
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 | |
| 454. |
The main product of high temperature carbonisation of coal is |
| A. | coke |
| B. | ammonia |
| C. | tar |
| D. | phenol |
| Answer» B. ammonia | |
| 455. |
Chemical formula of 'salt cake' is |
| A. | Na2SO4 |
| B. | CaSO4 |
| C. | MgSO4 |
| D. | BaSO4 |
| Answer» B. CaSO4 | |
| 456. |
Commercially ethylene is produced from naphtha by |
| A. | catalytic cracking. |
| B. | catalytic dehydrogenation. |
| C. | pyrolysis. |
| D. | hydrocracking. |
| Answer» E. | |
| 457. |
Cumene is the starting material for the production of |
| A. | benzoic acid |
| B. | phenol and acetone |
| C. | isoprene |
| D. | styrene |
| Answer» C. isoprene | |
| 458. |
Which is a high grade pulp ? |
| A. | Rag pulp |
| B. | Mechanical pulp |
| C. | Sulphate pulp |
| D. | Sulphite pulp |
| Answer» D. Sulphite pulp | |
| 459. |
Which of the following is not a food additive? |
| A. | Citric acid |
| B. | Invertage |
| C. | Benzoyl peroxide |
| D. | Ammonium chloride |
| Answer» E. | |
| 460. |
Rancidity of the fatty oil can be reduced by its |
| A. | decoloration |
| B. | hydrogenation |
| C. | oxidation |
| D. | purification |
| Answer» C. oxidation | |
| 461. |
Commercial production of calcium carbide requires limestone and __________ as raw materials. |
| A. | coke |
| B. | sand |
| C. | soda ash |
| D. | fuel oil |
| Answer» C. soda ash | |
| 462. |
__________ is a thermosetting plastic. |
| A. | Polythene |
| B. | Epoxy polymer |
| C. | P.V.C. |
| D. | Polystyrene |
| Answer» C. P.V.C. | |
| 463. |
Unsaturated oils compared to saturated oils have |
| A. | lower melting point & higher reactivity to oxygen. |
| B. | higher melting point & higher reactivity to oxygen. |
| C. | lower melting point & lower reactivity to oxygen. |
| D. | higher melting point & lower reactivity to oxygen. |
| Answer» B. higher melting point & higher reactivity to oxygen. | |
| 464. |
The chamber process is |
| A. | preferred over contact process for producing 98 to 100% H2SO4 and various oleums. |
| B. | non-catalytic and operates only on pyrites. |
| C. | a batch process for directly producing high strength (98 to 100%) H2SO4. |
| D. | none of these. |
| Answer» E. | |
| 465. |
Styrene-butadiene-rubber (SBR) as compared to natural rubber has |
| A. | Poorer tensile strength. |
| B. | poorer resistance to oxidation. |
| C. | greater amount of heat build-up under heavy loading. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 466. |
Raw material used in alcohol distilleries in India is |
| A. | molasses |
| B. | benzol |
| C. | methylated spirit |
| D. | none of these |
| Answer» B. benzol | |
| 467. |
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at |
| A. | SASOL (in South Africa). |
| B. | Redcar (U.K.). |
| C. | Los-Angles (U.S.A.). |
| D. | Trombay (India). |
| Answer» B. Redcar (U.K.). | |
| 468. |
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it |
| A. | has larger production capacity per unit cell. |
| B. | consumes less power per ton of Cl2 produced. |
| C. | produces high purity (70%) caustic soda directly. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 469. |
Ethyl alcohol cannot be produced |
| A. | from waste sulphite substrate of paper mills. |
| B. | by esterification and hydroloysis of ethylene. |
| C. | from molasses. |
| D. | none of these. |
| Answer» E. | |
| 470. |
__________ is produced by the dehydrogenation of ethyl benzene. |
| A. | Styrene |
| B. | Ethyl alcohol |
| C. | Cumene |
| D. | Phenol |
| Answer» B. Ethyl alcohol | |
| 471. |
For the hydrogenation of oils __________ (A) __________ is commonly used as catalyst and __________ (B) __________ is a catalyst poison. |
| A. | (A) platinum (B) sulphur |
| B. | (A) palladium (B) oxygen |
| C. | (A) nickel (B) sulphur |
| D. | (A) nickel (B) oxygen |
| Answer» D. (A) nickel (B) oxygen | |
| 472. |
Carbon content of pitch (residue of coal tar distillation) is around __________ percent. |
| A. | 70 |
| B. | 55 |
| C. | 80 |
| D. | 94 |
| Answer» E. | |
| 473. |
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its |
| A. | poor oxidation stability and high gum forming tendency. |
| B. | greater tendency of decomposition at elevated temperature. |
| C. | hydrolysis tendency in presence of water. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 474. |
Esterification reaction produces |
| A. | detergent |
| B. | vanaspati |
| C. | soap |
| D. | mercaptans |
| Answer» D. mercaptans | |
| 475. |
Bordeaux mixture is a/an |
| A. | fertiliser |
| B. | inorganic fungicide |
| C. | insecticide |
| D. | explosive |
| Answer» C. insecticide | |
| 476. |
__________ acid is the main constituent of cotton seed oil. |
| A. | Acetic |
| B. | Linoleic |
| C. | Palmitic |
| D. | Oleic |
| Answer» C. Palmitic | |
| 477. |
Blue vitriol is chemically |
| A. | copper sulphate |
| B. | ferrous sulphate |
| C. | copper nitrate |
| D. | aluminium sulphate |
| Answer» B. ferrous sulphate | |
| 478. |
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. | |
| 479. |
Raw materials used for producing __________ cement does not contain iron oxide. |
| A. | waterproof |
| B. | slag |
| C. | white |
| D. | pozzolan |
| Answer» D. pozzolan | |
| 480. |
Kopper-Totzek coal gasifier |
| A. | can give ammonia synthesis gas (H2 + N2). |
| B. | is a moving bed reactor. |
| C. | cannot use coking coal. |
| D. | operate at very high pressure. |
| Answer» B. is a moving bed reactor. | |
| 481. |
Silicone is a/an |
| A. | thermoplastic |
| B. | inorganic polymer |
| C. | monomer |
| D. | none of these |
| Answer» C. monomer | |
| 482. |
The most widely used coagulant for removing suspended impurities from water is |
| A. | bleaching powder |
| B. | chlorine |
| C. | calcium sulphate |
| D. | alum |
| Answer» E. | |
| 483. |
Neoprene is a |
| A. | monomer |
| B. | synthetic rubber |
| C. | polyester |
| D. | none of these |
| Answer» C. polyester | |
| 484. |
A substance produced by a living organism and capable of anti-microbial activity is called a/an |
| A. | antibiotic |
| B. | antiseptic |
| C. | disinfectant |
| D. | none of these |
| Answer» B. antiseptic | |
| 485. |
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to |
| A. | brighten the faint images. |
| B. | remove metallic silver. |
| C. | convert silver chloride to silver. |
| D. | remove unexposed silver halide. |
| Answer» E. | |
| 486. |
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. | |
| 487. |
Solvent used for extraction of oil is |
| A. | hexane |
| B. | methyl ethyl ketone |
| C. | furfurol |
| D. | none of these |
| Answer» B. methyl ethyl ketone | |
| 488. |
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in |
| A. | pyrolysis of oil. |
| B. | sintering of porous catalyst. |
| C. | hydrogen embrittlement. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 489. |
Low temperature carbonisation of coal takes place at __________ °C. |
| A. | 300 |
| B. | 1100 |
| C. | 700 |
| D. | 900 |
| Answer» D. 900 | |
| 490. |
Fish contains about __________ percent oil. |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 35 |
| Answer» D. 35 | |
| 491. |
Calcination of limestone is not done in a __________ kiln for producing lime. |
| A. | vertical shaft |
| B. | rotary |
| C. | fluidised bed |
| D. | fixed bed |
| Answer» E. | |
| 492. |
H2S is scrubbed from refinery gases by absorption using |
| A. | dilute H2SO4 |
| B. | ethanol amine |
| C. | chilled water |
| D. | tri-butyl phosphate |
| Answer» C. chilled water | |
| 493. |
Glycerine can be obtained from |
| A. | fat |
| B. | naphthalene |
| C. | cumene |
| D. | sucrose |
| Answer» B. naphthalene | |
| 494. |
In the Lurgi coal gasifier |
| A. | coking coals cannot be used. |
| B. | low carbon conversion efficiency is achieved. |
| C. | entrainment of solids is higher. |
| D. | large quantity of coal can be processed. |
| Answer» E. | |
| 495. |
Styrene butadiene rubber (SBR) is |
| A. | a natural rubber. |
| B. | a synthetic polymer. |
| C. | a synthetic monomer. |
| D. | another name of silicone rubber. |
| Answer» C. a synthetic monomer. | |
| 496. |
Flux addition during smelting of ore is done to |
| A. | remove impurities/gangue. |
| B. | enhance rate of reaction. |
| C. | accelerate reduction of ore. |
| D. | separate slag from metal. |
| Answer» B. enhance rate of reaction. | |
| 497. |
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 | |
| 498. |
Fusion of bauxite and __________ produces high alumina cement. |
| A. | alum |
| B. | limestone |
| C. | coke |
| D. | quartz |
| Answer» C. coke | |
| 499. |
Litharge is |
| A. | lead oxide |
| B. | zinc oxide |
| C. | zinc sulphide |
| D. | cellulosic photographic material |
| Answer» B. zinc oxide | |
| 500. |
Glycerine is not used in the |
| A. | manufacture of explosive. |
| B. | conditioning and humidification of tobacco. |
| C. | manufacture of pharmaceuticals. |
| D. | none of these. |
| Answer» E. | |