Chemical Engineering MCQs

Page No. 698

During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as_______________________?


aIt is very corrosive at elevated temperature


bIts viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)


cIt decomposes on further increasing the temperature


dNone of these



In industrial nomenclature, alcohol means_________________?


aButyl alcohol


bPropyl alcohol


cEthanol


dMethyl alcohol


View Answer Ethanol

Gun powder uses_____________________?


aSulphur


bCharcoal


cPotassium nitrate


dAll A , B, & C.


View Answer All A , B, & C.

Triple superphosphate is manufactured by reacting ____________________?


aPhosphate rock with phosphoric acid


bPhosphate rock with sulphuric acid


cPhosphate rock with sulphuric acid


dAmmonium phosphate with phosphoric acid



Average sulphur content in Indian pyrites is about _________________ percent?


a15


b35


c55


d70


View Answer 35

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


aBakelite


bTeflon


cCelluloid


dDacron


View Answer Teflon

Ultimate analysis of coal determines its _______________________ content?


aCarbon, hydrogen, nitrogen & sulphur


bCarbon, ash, sulphur & nitrogen


cCarbon, sulphur, volatile matter & ash


dCarbon, volatile matter, ash & moisture



Presence of sodium tripolyphosphate (an additive) in synthetic detergent___________________?


aFacilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)


bInhibits its corrosive effects


cDoes not allow redeposition of dirt on the cleaned surface


dNone of these



The process used for the manufacture of ethyl alcohol from molasses is_________________?


aDistillation


bDehydration


cDehydrogenation


dNone of these


View Answer None of these

Alcohol percentage in molasses may be around _____________________?


a10


b40


c70


d85


View Answer 40

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