Chemical Engineering MCQs

Page No. 715

Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?


aCaO

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bMnO2

✖


cZnO

✓


dFeS

✖


View Answer ZnO

More than 100 percent of _________________ is present in oleum?


aSO3

✖


bH2SO4

✓


cH2SO3

✖


dSO2

✖


View Answer H2SO4

Which of the following is not an abrasive material ?


aBakelite

✓


bPumice

✖


cCorundum

✖


dCarborundum

✖


View Answer Bakelite

Black liquor is converted into white liquor by __________________________?


aEvaporation and burning the concentrate followed by causticisation of products

✓


bMulti-effect evaporation only

✖


cSelective liquid extraction

✖


dExtractive distillation

✖



Roasting of metallurgical ores is done mainly to ___________________?


aDehydrate it

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bSinter the ore

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cRemove CO2 & H2O

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dRemove arsenic & sulphur

✓



Liquor poisoning generally occurs due to the presence of _________________ in it ?


aEthyl alcohol

✖


bImpurities

✖


cMethyl alcohol

✓


dCarbonic acid

✖


View Answer Methyl alcohol

Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?


aReduction

✖


bRoasting

✓


cCalcination

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dSmelting

✖


View Answer Roasting

Alcohol content in freshly prepared natural and fortified wine may be respectively around ______________ percent ?


a7-14 and 14-30

✓


b7-14 and 40-50

✖


c14 – 30 and 40-50

✖


d10 – 20 and 40 – 50

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View Answer 7-14 and 14-30

Saponification number of an oil or fat____________________?


aGives an idea about its molecular weight

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bIs inversely proportional to its molecular weight

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cDetects its adulteration

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dAll A , B. & C.

✓


View Answer All A , B. & C.

Coke used for the production of calcium carbide should have____________________?


aLow ash content

✖


bLow ignition temperature

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cHigh electrical resistivity

✖


dAll A , B. and C.

✓


View Answer All A , B. and C.

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