Chemical Engineering MCQs

Page No. 710

Which of the following is used as a coagulant in water treatment ?


aChloramine

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bChlorine

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cFerrous sulphate

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dHydrogen peroxide

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View Answer Ferrous sulphate

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively ?


aV2O5 & Cr2O3.

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bOxides of nitrogen & Cr2O3

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cV2O5 on a porous carrier & oxides of nitrogen

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dOxides of nitrogen & V2O5 on a porous carrier

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Detergent is produced by the sulphonation of dodecyl benzene, which is an ________________ reaction?


aEndothermic

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bExothermic

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cIrreversible

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dBoth B. and C.

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View Answer Both B. and C.

Isopropyl benzene produced by alkylation of benzene with propylene is known as _________________?


aNeoprene

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bCumene

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cGelatin

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dMercaptans

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View Answer Cumene

Dichloro diphenyl ________________ is the full form of DDT (an insecticide) ?


aTetrachloroethane

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bTrichloroethane

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cTetrachloromethane

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dTrichloromethane

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View Answer Trichloroethane

Calcareous & argillaceous materials are used in the manufacture of ___________________?


aLead

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bCement

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cCarbon disulphide

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dNone of these

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View Answer Cement

Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of __________________?


a4 kgf/cm2 & 500°C

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b10 kgf/cm2 & 1000°C

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c40 kg/cm2 & 200°C

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d100 kgf/cm2 & 500°C

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View Answer 4 kgf/cm2 & 500°C

Fats as compared to oils have ___________________?


aMore unsaturated glycerides of fatty acids

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bLess unsaturated glycerides of fatty acids

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cMuch higher reactivity to oxygen

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dLower melting point

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Oils are partially hydrogenated (not fully) to manufacture Vanaspati , because fully saturated solidified oils ?


aCause cholesterol build up and blood clotting

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bAre prone to rancid oxidation

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cAlways contain some amount of nickel (as their complete removal is very difficult)

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dHave affinity to retain harmful sulphur compounds

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Catalytic oxidation of naphthalene produces ?


aStyrene

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bPhenol

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cPhthalic anhydride

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dNone of these

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View Answer Phthalic anhydride

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