Chemical Engineering MCQs

Page No. 728

Refractory bricks burnt at very high temperature have got______________?


aGreater resistance to corrosion by slags


bLess resistance to corrosion by slags


cHigh spalling tendency


dNone of these



Main constituent of limestone is____________________?


aCaCO3


bMgCO3


cNa2CO3


dNa2CO3


View Answer CaCO3

Sulphuric acid saturated with SO3 is called_________________?


aConcentrated H2SO4


bSulphurous acid


cOleum


dNone of these


View Answer Oleum

Hydrogenation of oil does not ___________________?


aRemove double bonds


bRaise its melting point


cImprove its resistance to oxidation


dNone of these


View Answer None of these

Stereospecific agents are exemplified by________________?


aRadiation


bSupported metal oxide catalysts


cZiegler catalysts


dAll A , B. & C


View Answer All A , B. & C

The enzyme which converts starch into the disaccharides maltose is_________________?


aDiastase


bMaltase


cYeast


dNone of these


View Answer Diastase

____________________ of rubber decreases after its vulcanisation?


aResistance to the action of organic solvent


bTackiness


cMaximum service temperature


dTensile strength


View Answer Tackiness

Reaction of an alcohol with organic acid is called the ________________ reaction?


aSaponification


bEsterification


cNeutralisation


dAcidification


View Answer Esterification

The major use of butadiene is____________________?


aAs a plasticiser for unsaturated polyester


bIn the manufacture of synthetic rubber


cAs an anti-skinning agent in paint


dNone of these



Which glass is usually used in optical work ?


aLead glass


bHigh silica (borosilicate) glass


cPhoto-sensitive glass


dFibre glass


View Answer Photo-sensitive glass

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