Chemical Engineering MCQs

Page No. 707

Unsaturated oils compared to saturated oils have___________________?


aLower melting point & higher reactivity to oxygen

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bHigher melting point & higher reactivity to oxygen

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cLower melting point & lower reactivity to oxygen

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dHigher melting point & lower reactivity to oxygen

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Bakelite is chemically known as_____________________?


aPolyvinyl chloride (PVC)

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bPolybutadiene

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cPhenol formaldehyde

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dPolyurethane

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View Answer Phenol formaldehyde

Concentration of hydrogen peroxide is done by_____________________?


aCrystallisation

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bVacuum crystallisation

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cAtmospheric distillation

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dDehydration

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Which of the following is the main constituent of the mother liquor produced in salt industry ?


aQuick lime

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bGlauber’s salt

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cSalt petre

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dBromine

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View Answer Bromine

______________ paper is used in the manufacture of newsprint paper ?


aGround-wood

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bBoard

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cTissue

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dWrapping

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View Answer Ground-wood

Pick out the exothermic reaction out of the following ?


aC + H2O = CO + H2

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bCaC2 + H2O = Ca(OH)2 + C2H2

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cMgCO3 = MgO + CO2

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dAll (A), B. and (C)

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Which of the following, when pyrolysed, produces Perchloroethylene ?


aEthylene dichloride

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bChlorobenzene

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cCarbon tetrachloride

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dChlorinated paraffin

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View Answer Carbon tetrachloride

Magnesium and calcium ______________ cause temporary hardness of water ?


aCarbonates

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bBicarbonates

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cPhosphates

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dSulphates

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View Answer Bicarbonates

Tall oil obtained as a by-product from the black liquor recovery is________________?


aA black, sticky & viscous liquid

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bUsed in the manufacture of greases, emulsions & soaps

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cComposed mainly of rosin & fatty acids

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dAll A , B. & C.

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View Answer All A , B. & C.

Pick out the wrong statement pertaining to nitric acid ?


aAbout 90% of nitric acid is manufactured by Ostwald’s process

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bIt is a strong mono basic acid which reacts with almost all the metals except noble metals

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cYellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)

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dArc process of nitric acid manufacture is economical as compared to Ostwald’s process

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