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

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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

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dNone of these

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In industrial nomenclature, alcohol means_________________?


aButyl alcohol

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bPropyl alcohol

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cEthanol

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dMethyl alcohol

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View Answer Ethanol

Gun powder uses_____________________?


aSulphur

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bCharcoal

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cPotassium nitrate

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dAll A , B, & C.

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View Answer All A , B, & C.

Triple superphosphate is manufactured by reacting ____________________?


aPhosphate rock with phosphoric acid

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bPhosphate rock with sulphuric acid

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cPhosphate rock with sulphuric acid

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dAmmonium phosphate with phosphoric acid

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Average sulphur content in Indian pyrites is about _________________ percent?


a15

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b35

✓


c55

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d70

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View Answer 35

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


aBakelite

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bTeflon

✓


cCelluloid

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dDacron

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View Answer Teflon

Ultimate analysis of coal determines its _______________________ content?


aCarbon, hydrogen, nitrogen & sulphur

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bCarbon, ash, sulphur & nitrogen

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cCarbon, sulphur, volatile matter & ash

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dCarbon, volatile matter, ash & moisture

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


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

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bInhibits its corrosive effects

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cDoes not allow redeposition of dirt on the cleaned surface

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dNone of these

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


aDistillation

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bDehydration

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cDehydrogenation

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dNone of these

✓


View Answer None of these

Alcohol percentage in molasses may be around _____________________?


a10

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b40

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c70

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d85

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View Answer 40

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