Chemical Engineering MCQs

Page No. 738

Sand and ______________ is fused at 1300°C, to produce sodium silicate ?


aLimestone

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bSoda ash

✓


cCoke

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dSodium sulphate

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View Answer Soda ash

The main use of HCl is in the___________________?


aDrilling of petroleum wells and pickling of steel sheets

✓


bManufacture of cationic detergent

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cTreatment of spent fuel of nuclear reactor

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dNone of these

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High purity nitrogen is used in__________________?


aMaking protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils

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bFire fighting purposes

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cBoth A. & B.

✓


dNeither A. nor (B)

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View Answer Both A. & B.

Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________?


a0.5

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b5

✓


c20

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d35

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View Answer 5

Which of the following is an unsaturated fatty acid ?


aLauric acid

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bPalmitic acid

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cStearic acid

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dOleic acid

✓


View Answer Oleic acid

Iron ore hematite is concentrated using ____________________?


aElectromagnetic separation mainly

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bGravity separation

✓


cFroth floatation

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dRoasting

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View Answer Gravity separation

The most widely used coagulant for removing suspended impurities from water is__________________?


aBleaching powder

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bChlorine

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cCalcium sulphate

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dAlum

✓


View Answer Alum

Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?


aDepithing

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bDigestion

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cBleaching

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dNone of these

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View Answer Depithing

Flexible foam (for mattresses) is usually made of_____________________?


aPVC

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bSilicone

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cPolyurethanes

✓


dPolyamides

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View Answer Polyurethanes

Thermoplastic materials_____________________?


aDo not soften on application of heat

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bAre heavily branched molecules

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cAre solvent insoluble

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dNone of these

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View Answer None of these

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