Chemical Engineering MCQs

Page No. 780

An oxidation process is accompanied with decrease in the____________________?


aNumber of electrons


bOxidation number


cNumber of ions


dAll A , B. & C.


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


bSaturated


cSuperheated


dNone of these


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


bFlow around the sphere should be in turbulent region


cSphere must be metallic


dFluid density should be constant



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


aStorm


bRain


cClear weather


dCold wave


View Answer Storm

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


aHexagonal close, packed (hcp)


bFace centred cubic (fcc)


cBody centred cubic (bcc)


dSimple cubic


View Answer Simple cubic

Atomic _______________ is a whole number for an element?


aNumber


bWeight


cRadius


dNone of these


View Answer Number

Titanium is produced by ___________________ of Ti Cl4 ?


aElectrolytic reduction


bCalcium reduction


cMagnesium reduction


dThermal dissociation


View Answer Magnesium reduction

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


aInvar


bHastelloy


cDuralumin


dMonel metal


View Answer Invar

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


aPercentage elongation


bBrinell hardness


cTensile strength


dAll A, B & C


View Answer Percentage elongation

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


aSiO2


bAl2O3


cMnO2


dP


View Answer SiO2

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