Chemical Engineering MCQs

Page No. 711

Pick out the wrong statement?


aConversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%

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bThe chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide

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cVitriol oil is nothing but technical sulphuric acid

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dDecomposition of sulphuric acid on heating does not start before its boiling

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Pick out the wrong statement ?


aPasteurisation of milk involves moderate heating followed by cooling

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bBakeries and breweries make use of yeasts

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cEnzyme is a complex nitrogenous compound

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dOils and fats are alkaloids

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Pick out the wrong statement ?


aFibrillation of fibre during paper manufacture is done to develop the strength in paper

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bAlkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number

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cBagasse fibre contains both lignin & cellulose

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dPresence of sodium sulphate in pulp makes the pulp bleachability poor

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Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ?


aSodium silicate

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bSodium borate

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cSodium tripolyphosphate (STPP)

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dCaustic soda

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View Answer Sodium borate

RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically____________________?


aCyclo trimethylene trinitramine

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bTrinitro resorcinol

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cCyclo tetramethylene tetranitramine

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dTrinitrobenzene

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Helium is produced on commercial scale from__________________?


aAir

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bNatural gas

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cCoke oven gas

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dNone of these

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View Answer Natural gas

Ca(OH)2 is called __________________?


aQuicklime

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bSlaked lime

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cLimestone

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dGypsum

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View Answer Slaked lime

Oxidation of ortho-xylene in presence of ______________ catalyst is done to produce phthalic anhydride on commercial scale ?


aNickel

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bVanadium

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cAlumina

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dIron

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View Answer Vanadium

Fumigant insecticides___________________?


aKill insects, when they eat it

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bEmit poisonous vapour

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cAre absorbed throughout the plant

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dNone of these

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View Answer None of these

Pick out the wrong statement?38553


aNet worth means paid up share capital and reserve & surplus (i.e. shareholders equity)

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bReturn on equity = profit after tax/net worth

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cWorking capital turnover ratio = sales/net working capital

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dTotal cost of production is more than net sales realisation (NSR) at breakeven point

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