Chemical Engineering MCQs

Page No. 711

Pick out the wrong statement?


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


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


cVitriol oil is nothing but technical sulphuric acid


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



Pick out the wrong statement ?


aPasteurisation of milk involves moderate heating followed by cooling


bBakeries and breweries make use of yeasts


cEnzyme is a complex nitrogenous compound


dOils and fats are alkaloids



Pick out the wrong statement ?


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


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


cBagasse fibre contains both lignin & cellulose


dPresence of sodium sulphate in pulp makes the pulp bleachability poor



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


bSodium borate


cSodium tripolyphosphate (STPP)


dCaustic soda


View Answer Sodium borate

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


aCyclo trimethylene trinitramine


bTrinitro resorcinol


cCyclo tetramethylene tetranitramine


dTrinitrobenzene



Helium is produced on commercial scale from__________________?


aAir


bNatural gas


cCoke oven gas


dNone of these


View Answer Natural gas

Ca(OH)2 is called __________________?


aQuicklime


bSlaked lime


cLimestone


dGypsum


View Answer Slaked lime

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


aNickel


bVanadium


cAlumina


dIron


View Answer Vanadium

Fumigant insecticides___________________?


aKill insects, when they eat it


bEmit poisonous vapour


cAre absorbed throughout the plant


dNone of these


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)


bReturn on equity = profit after tax/net worth


cWorking capital turnover ratio = sales/net working capital


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



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