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

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

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dNone of these

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


aDehydration

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bReduction

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cOxidation

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dPolymerisation

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View Answer Oxidation

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


a-5 to 0

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b5 to 10

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c30 to 50

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d75 to 80

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View Answer 30 to 50

Reverse osmosis is normally used for the_______________?


aSeparation of isotopes of uranium from gaseous uranium hexafluoride

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bSeparation of helium from natural gas

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cDesalination of brackish water to produce potable (drinking) water

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dPurification of oxygen

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Chloral is used in the manufacture of__________________?


aDDT

✓


bBHC

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cParathion

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dNone of these

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View Answer DDT

Higher viscosity index of a lubricating oil denotes_______________?


aLess changes in fluidity of oil with temperature

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bSubstantially high change in fluidity of oil with temperature

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cIts unsuitability under varying temperature conditions

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dNone of these

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Hydrochloric acid is also known as_________________?


aOil of vitriol

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bMuriatic acid

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cStrong organic acid

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dGreen acid

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View Answer Muriatic acid

Ordinary glass is not a/an_________________?


aAmorphous isotropic material

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bSupercooled liquid

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cMaterial with sharp definite melting point

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dElectrical insulator

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Wax is a___________________?


aMixture of glycerides

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bMixture of esters of polyhydric alcohols excepting glycerine

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cLiquid at room temperature

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dMixture of glycerides of fatty acids

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


a1

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b2.5

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c5

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d10

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View Answer 2.5

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