chemical engineering MCQs – Page 65

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

1281. Pick out the exothermic reaction out of the following ?
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A. CaC2 + H2O = Ca(OH)2 + C2H2

B. MgCO3 = MgO + CO2

C. All (A), B. and (C)

D. C + H2O = CO + H2

1282. Neoprene is chemically known as___________________?
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A. Styrene butadiene rubber (SBR)

B. Polyurethane

C. Polychlorophrene

D. Polybutadiene

1283. Calcination of gypsum produces__________________?
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A. Lime

B. Plaster of Paris

C. Nitre cake

D. Salt cake

1284. Catalytic oxidation of naphthalene produces_______________?
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A. Styrene

B. None of these

C. Phthalic anhydride

D. Phenol

1285. Pasteurisation of milk means______________________?
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A. None of these

B. Killing of organisms present in it by heating it at controlled temperature without changing its

C. ural characteristics</strong>

D. Inhibiting the growth of micro-organisms without killing them

E. Removal of fatty and albuminous substance from it

1286. Raw materials used for producing ________________ cement does not contain iron oxide?
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A. White

B. Slag

C. Pozzolan

D. Waterproof

1287. In the Lurgi coal gasifier_________________?
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A. Large quantity of coal can be processed

B. Low carbon conversion efficiency is achieved

C. Entrainment of solids is higher

D. Coking coals cannot be used

1288. Ca(OH)2 is called __________________?
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A. Limestone

B. Slaked lime

C. Quicklime

D. Gypsum

1289. Fermentation of molasses to produce ethyl alcohol is done at ________________ C?
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A. 100 150

B. < 5

C. 20 30

D. 250 300

1290. Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively ?
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A. Oxides of nitrogen & V2O5 on a porous carrier

B. V2O5 on a porous carrier & oxides of nitrogen

C. Oxides of nitrogen & Cr2O3

D. V2O5 & Cr2O3.

1291. Cumene (isopropyl benzene) is made by ____________________?
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A. Polymerisation of a mixture of benzene & propylene

B. Oxidation of naphthalene

C. None of these

D. Propylene alkylation of benzene

1292. Ethyl alcohol cannot be produced_________________?
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A. From molasses

B. From waste sulphite substrate of paper mills

C. By Esterification and hydrolysis of ethylene

D. None of these

1293. Starting raw material for the manufacture of alum is_________________?
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A. Ammonium bicarbonate

B. Bauxite

C. Gypsum

D. Alumina

1294. Fusion of limestone and ______________ produces high alumina cement?
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A. Calcite

B. Sand

C. Quicklime

D. Bauxite

1295. ______________ process is used for the manufacture of sodium carbonate by ammonia soda process?
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A. Habers

B. Solvay

C. Bosch

D. Ostwalds

1296. Pick out the wrong statement?
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A. osilicate and aluminium borosilicate

B. enic oxide

C. Hard glass which is used for making laboratory glass wares is a mixture of sodium

D. Ordinary glass is represented chemically by Na2O . CaO . 6SiO2

E. Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or

F. Red color is imparted to glass by addition of arsenic oxide

1297. Superior quality laboratory apparatus is made of the _____________ glass having low thermal co-efficient of expansion & high chemical resistance?
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A. Pyrex

B. Soda

C. Flint

D. Potash

1298. Which of the following is not a pyrite ore ?
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A. Galena

B. Gypsum

C. Celestite

D. Siderite

1299. Resistance to fusion of the refractory under a steady rising temperature condition is called ____________________ ?
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A. Spalling

B. Refractoriness

C. Both A. & B.

D. Neither A. nor B.

1300. The function of gypsum addition during cement making is to_________________?
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A. Increase the density of cement

B. Decrease the cement setting rate

C. Both A. and B.

D. Neither A. nor B.

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