chemical engineering chemical process MCQs – Page 22

Practise multiple-choice questions from chemical engineering chemical process for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical process Mcqs
421. Chloral is used in the manufacture of__________________?
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A. None of these

B. DDT

C. BHC

D. Parathion

422. Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of __________________?
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A. 100 kgf/cm2 & 500C

B. 40 kg/cm2 & 200C

C. 4 kgf/cm2 & 500C

D. 10 kgf/cm2 & 1000C

423. Drinking (potable) water treatment does not involve __________________?
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A. Coagulation

B. Sedimentation

C. Disinfection

D. Softening
424. ______________ process is used for the manufacture of sodium carbonate by ammonia soda process?
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A. Ostwalds

B. Solvay

C. Bosch

D. Habers

425. Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an?
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A. Analgesic drug

B. Soap

C. Detergent

D. Explosive

426. Black liquor is converted into white liquor by __________________________?
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A. Extractive distillation

B. Multi-effect evaporation only

C. Evaporation and burning the concentrate followed by causticisation of products

D. Selective liquid extraction

427. Bakelite is chemically known as_____________________?
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A. Phenol formaldehyde

B. Polyurethane

C. Polyvinyl chloride (PVC)

D. Polybutadiene

428. In industrial nomenclature, alcohol means_________________?
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A. Propyl alcohol

B. Butyl alcohol

C. Methyl alcohol

D. Ethanol
429. The biochemical treatment applied to sewage effluents is a process of__________________?
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A. Reduction

B. Polymerisation

C. Dehydration

D. Oxidation
430. The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by_________________?
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A. None of these

B. Electrolytic reduction

C. Electrolysis

D. Electrolytic oxidation

431. Main constituent of dolomite is __________________?
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A. Na2CO3

B. MgCO3

C. K2CO3

D. CaCO3

432. Low purity oxygen is used for____________________?
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A. Chemical oxidation processes

B. L.D. steel making

C. Medicinal purposes

D. Cutting and welding of metals

433. Oils are partially hydrogenated (not fully) to manufacture Vanaspati , because fully saturated solidified oils ?
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A. Have affinity to retain harmful sulphur compounds

B. Are prone to rancid oxidation

C. Cause cholesterol build up and blood clotting

D. Always contain some amount of nickel (as their complete removal is very difficult)

434. In the production of soda ash by Solvay process, the by-product is____________________?
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A. CaCl2

B. NH4Cl

C. NH3

D. NaOH

435. Pick out the wrong statement ?
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A. Acetylene gas cannot be used for illumination purpose

B. Strongly caking coal should not be used in the Lurgi gasifier

C. Water gas is called blue gas because of the color of the flame, when it is burnt

D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels

436. Fats as compared to oils have ___________________?
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A. Much higher reactivity to oxygen

B. Less unsaturated glycerides of fatty acids

C. More unsaturated glycerides of fatty acids

D. Lower melting point

437. Saponification number of an oil or fat____________________?
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A. Gives an idea about its molecular weight

B. Detects its adulteration

C. All A , B. & C.

D. Is inversely proportional to its molecular weight

438. ______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?
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A. Manganese

B. Limestone

C. Bauxite

D. Quartz

439. Pick out the wrong statement ?
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A. Protein catalysts are called enzymes

B. Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye

C. pectively

D. The rate of chemical reaction is independent of the concentration of reactants at high

E. centration of enzymes

F. Total sugar content in molasses is about 10%
440. Fumigant insecticides___________________?
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A. Emit poisonous vapour

B. None of these

C. Are absorbed throughout the plant

D. Kill insects, when they eat it