chemical engineering chemical process MCQs – Page 30

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 Review each marked answer and report any item that may be outdated or unclear.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
581. Fermentation of molasses to produce ethyl alcohol is done at ________________ C?
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A. 20 30

B. 250 300

C. < 5

D. 100 150

582. Production of one ton of dry paper pulp requires about ___________________ tons of bamboo or wood?
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A. 5

B. 2.5

C. 10

D. 1

583. Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?
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A. FeS

B. MnO2

C. ZnO

D. CaO

584. Which one of the following is not likely to be a constituent of vegetable oils ?
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A. Citric acid

B. Glycerol

C. Oleic acid

D. Stearic acid

585. Oxygen is produced by fractionation of air using _____________ process?
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A. Either A. or B.

B. None of these

C. Claudes

D. Lindes

586. Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the _____________ process?
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A. Sulphite

B. Sulphate/Kraft

C. Neutral sulphite semi-chemical

D. Mechanical

587. Pick out the wrong statement?
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A. hard soaps and increases its cleansing action

B. Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due

C. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens

D. tea, blood etc</strong>

E. Soap powder is prepared by mixing soap with hydrated sodium carbonate

F. Detergents differ from soaps in their action in hard water

588. Phthalic anhydride is made by the ______________________?
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A. Dehydrogenation of ethyl benzene

B. Oxidation of naphthalene

C. Oxidation of benzene

D. None of these

589. Le-Blanc process is a primitive process for the manufacture of___________________?
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A. Bromine from sea water

B. Hydrochloric acid

C. Caustic soda

D. Soda ash
590. Common salt is generally not produced commonly by ________________ method from brine ?
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A. Freeze drying

B. Solar evaporation

C. Electrolytic

D. Vacuum evaporation

591. Which of the following is not produced on commercial scale from sea water ?
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A. Bromine

B. Potassium compounds

C. Sodium sulphate

D. Magnesium compounds

592. Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is __________________?
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A. Still in development stage (by employing fluidised bed technique)

B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)

C. All A , B. and C

D. A slow reaction

593. Pick out the correct statement ?
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A. ty acids content

B. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon

C. A fat is converted into oil by its hydrogenation

D. ms</strong>

E. There is no difference between a fat and an oil so far as its physical properties are concerned

F. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their

594. Synthetic glycerine is produced from___________________?
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A. Phenol

B. Toluene

C. Propylene

D. Naphthalene

595. Dehydrogenation of Isopropanol produces ____________________?
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A. Trichloroethylene

B. Formaldehyde

C. Propyl alcohol

D. Acetone
596. Plaster of Paris is __________________?
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A. CaSO4.H2O

B. Used for setting of broken bones

C. Both A. and B.

D. Same as gypsum

597. Blue vitriol is chemically___________________?
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A. Copper nitrate

B. Copper sulphate

C. Aluminium sulphate

D. Ferrous sulphate

598. Trinitro-toluene (TNT) is _________________ ?
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A. Used in glycerine manufacture

B. None of these

C. Used in dye manufacture

D. An explosive
599. Raw materials required for the manufacture of __________________ is acetylene and hydrochloric acid?
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A. Phthalic anhydride

B. Dacron

C. Maleic anhydride

D. Vinyl chloride
600. Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces ________________?
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A. Polyester

B. PVC

C. Dacron

D. Nylon-6