chemical engineering Mcqs
1351. ________________ is the major constituent of the Portland cement?
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A. Calcium oxide

B. Calcium carbonate

C. Tricalcium silicate

D. Calcium sulphate

1352. Portland cement consists mainly of__________________?
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A. CaO & Al2O3

B. CaO & SiO2

C. SiO2 & Al2O3

D. CaO & Fe2O3

1353. Ethanol amine is produced using ammonia and_________________?
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A. Ethanol

B. Ethane

C. Ethylene oxide

D. Ethyl benzene

1354. Aryl benzene sulphonate (ABS) is a____________________?
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A. Plasticiser for unsaturated polyester

B. Detergent

C. Starting material for the synthesis of glycerine

D. Coating ingredient for photographic film

1355. Kopper-Totzek coal gasifier_________________?
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A. Operate at very high pressure

B. Can give ammonia synthesis gas (H2 + N2)

C. Cannot use coking coal

D. Is a moving bed reactor

1356. Which of the following, when pyrolysed, produces Perchloroethylene ?
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A. Chlorobenzene

B. Ethylene dichloride

C. Chlorinated paraffin

D. Carbon tetrachloride
1357. Pick out the wrong statement ?
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A. Kraft method of pulp manufacture can process all types of fibrous raw materials

B. Digestion time for bagasse is less than that for wood base materials

C. Both temperature and pressure in the digestor is less in case of the sulphite method as

D. pared to that in the sulphate method

E. None of these
1358. Pick out the wrong statement. Iodine value of an oil or fat is________________?
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A. The number of grams of iodine taken up by 100 gm of oil or fat

B. Helpful in findings its adulteration & its suitability for making soap

C. A measure of its unsaturation

D. Independent of the type of oil, whether it is drying or non-drying
1359. Pick out the wrong statement ?
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A. Oils and fats are alkaloids

B. Enzyme is a complex nitrogenous compound

C. Pasteurisation of milk involves moderate heating followed by cooling

D. Bakeries and breweries make use of yeasts

1360. Which of the following sugars is the sweetest ?
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A. Sucrose

B. Glucose

C. Fructose

D. Lactose

1361. Pick out the wrong statement?
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A. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with

B. Vitriol oil is nothing but technical sulphuric acid

C. phur trioxide

D. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%

E. Decomposition of sulphuric acid on heating does not start before its boiling
1365. Essential oils are usually obtained using__________________?
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A. Steam distillation

B. Extractive distillation

C. Solvent extraction

D. Leaching
1366. Pick out the wrong statement ?
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A. Fibrillation of fibre during paper manufacture is done to develop the strength in paper

B. Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate

C. ber

D. Bagasse fibre contains both lignin & cellulose

E. Presence of sodium sulphate in pulp makes the pulp bleachability poor
1368. Alkylbenzene sulfonate (ABS) is a____________________?
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A. Polyester

B. Pesticide

C. Detergent

D. Rubber

1370. Use of chlorine in the treatment of sewage_________________?
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A. Helps in grease separation

B. Causes bulking of activated sludge

C. Increases the biological oxygen demand (BOD)

D. Aids in flocculation

1371. Polythene is a/an ______________ polymerisation product?
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A. None of these

B. Thermosetting

C. Condensation

D. Addition
1374. Chloramines are used in water treatment for_____________________?
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A. Removing turbidity

B. Disinfection and control of taste & odour

C. Corrosion control

D. Control of bacteria

1375. Saponification number of an oil or fat____________________?
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A. All A , B. & C.

B. Detects its adulteration

C. Gives an idea about its molecular weight

D. Is inversely proportional to its molecular weight

1376. Fumigant insecticides___________________?
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A. None of these

B. Kill insects, when they eat it

C. Are absorbed throughout the plant

D. Emit poisonous vapour

1380. Nickel is not used as a catalyst in the __________________ reaction ?
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A. Shift conversion

B. Steaming reforming of naphtha

C. Ammonia cracking/dissociation

D. Oil hydrogenation

1381. Rotary kiln is not involved in the production of___________________?
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A. Cement

B. None of these

C. Lime from limestone

D. Slaked lime from quick lime
1382. Deacons method is used for the manufacture of____________________?
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A. Common salt

B. Graphite electrode

C. Chlorine

D. Glaubers salt

1384. The basic difference between vegetable oils and fats is in their ___________________?
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A. Chemical properties

B. Composition

C. Physical state

D. Density

1385. Plasticisers are added to paints to______________________?
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A. Give elasticity & prevent cracking of the film

B. Make glossy surface

C. Increase atmospheric oxidation

D. Make it corrosion resistant

1387. Neoprene is the trade name of___________________?
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A. Polychlorophrene

B. Polyurethane

C. Phenol formaldehyde

D. Styrene-butadiene rubber

1389. Basic oxide is absent in ___________________ glass?
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A. Flint

B. Quartz

C. Pyrex

D. All A, B. & C

1390. Hydrochloric acid is also known as_________________?
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A. Strong organic acid

B. Oil of vitriol

C. Muriatic acid

D. Green acid

1391. Silicone is a/an ___________________?
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A. Monomer

B. Thermoplastic

C. Inorganic polymer

D. None of these

1392. Bordeaux mixture is a/an________________?
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A. Inorganic fungicide

B. Insecticide

C. Fertiliser

D. Explosive

1395. Thermal pyrolysis of ethylene dichloride produces___________________?
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A. Vinyl chloride

B. Ethylene oxide

C. Trichloroethylene

D. Ethanol amine

1397. Lindane is____________________?
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A. Not a fumigant

B. BHC (Benzene Hexachloride) containing 99% ?-isomer

C. A by-product of BHC manufacture

D. Both B. and C.

1399. Good quality of edible salt is obtained from brine by the process of__________________?
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A. Vacuum evaporation

B. Solar evaporation

C. Freeze drying

D. Electrolysis

1400. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the__________________?
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A. Dibasic acid and the ring

B. None of these

C. Diamine and the dibasic acid

D. Diamine and the ring