Chemical Engineering MCQs

Page No. 707

Unsaturated oils compared to saturated oils have___________________?


aLower melting point & higher reactivity to oxygen


bHigher melting point & higher reactivity to oxygen


cLower melting point & lower reactivity to oxygen


dHigher melting point & lower reactivity to oxygen



Bakelite is chemically known as_____________________?


aPolyvinyl chloride (PVC)


bPolybutadiene


cPhenol formaldehyde


dPolyurethane


View Answer Phenol formaldehyde

Concentration of hydrogen peroxide is done by_____________________?


aCrystallisation


bVacuum crystallisation


cAtmospheric distillation


dDehydration



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


aQuick lime


bGlauber’s salt


cSalt petre


dBromine


View Answer Bromine

______________ paper is used in the manufacture of newsprint paper ?


aGround-wood


bBoard


cTissue


dWrapping


View Answer Ground-wood

Pick out the exothermic reaction out of the following ?


aC + H2O = CO + H2


bCaC2 + H2O = Ca(OH)2 + C2H2


cMgCO3 = MgO + CO2


dAll (A), B. and (C)



Which of the following, when pyrolysed, produces Perchloroethylene ?


aEthylene dichloride


bChlorobenzene


cCarbon tetrachloride


dChlorinated paraffin


View Answer Carbon tetrachloride

Magnesium and calcium ______________ cause temporary hardness of water ?


aCarbonates


bBicarbonates


cPhosphates


dSulphates


View Answer Bicarbonates

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


aA black, sticky & viscous liquid


bUsed in the manufacture of greases, emulsions & soaps


cComposed mainly of rosin & fatty acids


dAll A , B. & C.


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


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


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


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



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