Chemical Engineering MCQs

Page No. 706

Transparent soaps (e.g. Pears) are____________________?


aUsually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency


bMetallic soaps with frothing agent and free Stearic acid to achieve transparency


cMetallic soaps with frothing agent from which glycerine has not been recovered


dNone of these



The biochemical treatment applied to sewage effluents is a process of__________________?


aDehydration


bReduction


cOxidation


dPolymerisation


View Answer Oxidation

Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is ____________ °C?


a-5 to 0


b5 to 10


c30 to 50


d75 to 80


View Answer 30 to 50

Reverse osmosis is normally used for the_______________?


aSeparation of isotopes of uranium from gaseous uranium hexafluoride


bSeparation of helium from natural gas


cDesalination of brackish water to produce potable (drinking) water


dPurification of oxygen



Chloral is used in the manufacture of__________________?


aDDT


bBHC


cParathion


dNone of these


View Answer DDT

Higher viscosity index of a lubricating oil denotes_______________?


aLess changes in fluidity of oil with temperature


bSubstantially high change in fluidity of oil with temperature


cIts unsuitability under varying temperature conditions


dNone of these



Hydrochloric acid is also known as_________________?


aOil of vitriol


bMuriatic acid


cStrong organic acid


dGreen acid


View Answer Muriatic acid

Ordinary glass is not a/an_________________?


aAmorphous isotropic material


bSupercooled liquid


cMaterial with sharp definite melting point


dElectrical insulator



Wax is a___________________?


aMixture of glycerides


bMixture of esters of polyhydric alcohols excepting glycerine


cLiquid at room temperature


dMixture of glycerides of fatty acids



Production of one ton of dry paper pulp requires about ___________________ tons of bamboo or wood?


a1


b2.5


c5


d10


View Answer 2.5

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