Chemical Engineering MCQs

Page No. 780

An oxidation process is accompanied with decrease in the____________________?


aNumber of electrons

✓


bOxidation number

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cNumber of ions

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dAll A , B. & C.

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View Answer Number of electrons

Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be_________________?


aWet

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bSaturated

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cSuperheated

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dNone of these

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View Answer Superheated

For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?


aReynolds number (based on sphere diameter) should be < 1

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bFlow around the sphere should be in turbulent region

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cSphere must be metallic

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dFluid density should be constant

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An abrupt and sudden fall in the reading of barometer is an indication of the____________________?


aStorm

✓


bRain

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cClear weather

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dCold wave

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View Answer Storm

Out of the following, the lowest packing of atoms exists in ____________________ crystal lattice structure?


aHexagonal close, packed (hcp)

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bFace centred cubic (fcc)

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cBody centred cubic (bcc)

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dSimple cubic

✓


View Answer Simple cubic

Atomic _______________ is a whole number for an element?


aNumber

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bWeight

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cRadius

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dNone of these

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View Answer Number

Titanium is produced by ___________________ of Ti Cl4 ?


aElectrolytic reduction

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bCalcium reduction

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cMagnesium reduction

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dThermal dissociation

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View Answer Magnesium reduction

Metallic surveying tapes are made of _____________ which has a low co-efficient of expansion & enough strength ?


aInvar

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bHastelloy

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cDuralumin

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dMonel metal

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View Answer Invar

In case of brasses, with decreasing zinc percentage and increasing copper percentage, its _____________ increases ?


aPercentage elongation

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bBrinell hardness

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cTensile strength

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dAll A, B & C

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View Answer Percentage elongation

Limestone addition in the blast furnace is done to flux _______________ present in the raw materials?


aSiO2

✓


bAl2O3

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cMnO2

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dP

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View Answer SiO2

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