chemical engineering chemical process MCQs – Page 25

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 Review each marked answer and report any item that may be outdated or unclear.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
481. Ordinary glass is not a/an_________________?
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A. Amorphous isotropic material

B. Material with sharp definite melting point

C. Electrical insulator

D. Supercooled liquid

482. ________________ is the major constituent of the Portland cement?
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A. Tricalcium silicate

B. Calcium sulphate

C. Calcium oxide

D. Calcium carbonate

483. Pick out the wrong statement?
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A. Azoic dyes are mostly applied on cotton fabrics

B. None of these

C. Mordant dyes are applied mainly to wools

D. Basic dyes (e.g. amino derivatives) are applied mostly to paper

484. Acetone is produced by catalytic dehydrogenation of_________________?
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A. Ethyl benzene

B. Naphthalene

C. Phenol

D. Isopropanol
485. Alcohol content in freshly prepared natural and fortified wine may be respectively around ______________ percent ?
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A. 10 20 and 40 50

B. 7-14 and 40-50

C. 14 30 and 40-50

D. 7-14 and 14-30
486. Pick out the wrong statement pertaining to nitric acid ?
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A. Arc process of nitric acid manufacture is economical as compared to Ostwalds process

B. It is a strong mono basic acid which reacts with almost all the metals except noble metals

C. About 90% of nitric acid is manufactured by Ostwalds process

D. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)

487. Aryl benzene sulphonate (ABS) is a____________________?
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A. Starting material for the synthesis of glycerine

B. Plasticiser for unsaturated polyester

C. Detergent

D. Coating ingredient for photographic film

488. Yeast is used in the manufacture of ____________________?
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A. Antibiotics

B. Penicillin

C. Wine

D. Pasteurised milk

489. Tall oil obtained as a by-product from the black liquor recovery is________________?
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A. Composed mainly of rosin & fatty acids

B. All A , B. & C.

C. A black, sticky & viscous liquid

D. Used in the manufacture of greases, emulsions & soaps

490. Which of the following has sodium bicarbonate as its main constituent ?
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A. None of these

B. Baking soda

C. Washing soda

D. Baking powder
491. Pick out the wrong statement ?
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A. Pasteurisation of milk involves moderate heating followed by cooling

B. Enzyme is a complex nitrogenous compound

C. Bakeries and breweries make use of yeasts

D. Oils and fats are alkaloids
492. Main constituents of Portland cement are calcium aluminate and__________________?
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A. Silicates

B. Sodium silicate

C. Gypsum

D. Carbonates

493. Superior quality laboratory apparatus is made of the _____________ glass having low thermal co-efficient of expansion & high chemical resistance?
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A. Potash

B. Soda

C. Pyrex

D. Flint

494. The ideal pulp for the manufacture of paper should have high ____________________ content?
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A. Cellulose

B. Lignin

C. Both A. & B.

D. None of these

495. Poly Tetrafluoroethylene (P.T.F.E.) is known as___________________?
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A. Celluloid

B. Bakelite

C. Dacron

D. Teflon
496. Dense soda ash used in the manufacture of glass, is chemically represented by__________________?
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A. Na2CO3.10H2O

B. Na2CO3.H2O

C. Na2HCO3

D. Na2CO3

497. During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160C, as_______________________?
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A. None of these

B. It is very corrosive at elevated temperature

C. It decomposes on further increasing the temperature

D. ther reduced)</strong>

E. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be
498. Highly porous refractory bricks are ____________________?
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A. Less susceptible to chemical attack by molten fluxes and gases etc

B. Having very high thermal conductivity

C. Very strong

D. None of these
499. H2S is scrubbed from refinery gases by absorption using ________________________?
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A. Dilute H2SO4

B. Ethanol amine

C. Tri-butyl phosphate

D. Chilled water

500. A good quality coal should have ______________________?
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A. None of these

B. Low fusion point of ash

C. High sulphur content

D. High ash content