Chemical Engineering MCQs

Page No. 569

A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is ___________________?


a0.33


b0.5


c1


dData insufficient, can’t be predicted


View Answer 1

In which of the following reactions, the equilibrium will shift to the right, if the total pressure is increased ?


aH2 + Cl2 ⇌ 2HCl


bN2 + O2 ⇌ 2NO


cN2O4 ⇌ 2 NO2


dH2 + I2 ⇌ 2HI


View Answer N2 + O2 ⇌ 2NO

A plug-flow reactor is characterized by _____________________?


aHigh capacity


bPresence of axial mixing


cPresence of lateral mixing


dConstant composition and temperature of reaction mixture



The rate of a gas phase reaction is given by K . CA . CB. If the volume of the reaction vessel is reduced to l/4th of its initial volume, then the reaction rate compared to the original rate will be _______________ times?


a4


b16


c8


d2


View Answer 16

In a CSTR _______________ varies with time ?


aReaction rate


bConcentration


cBoth A. & B.


dNeither A. nor B.


View Answer Neither A. nor B.

The enzyme which can catalyse the conversion of glucose to ethyl alcohol is ___________________?


aInvertase


bMaltase


cDiastase


dZymase


View Answer Zymase

The rate constant of a reaction depends on the __________________?


aInitial concentration of reactants


bTime of reaction


cTemperature of the system


dExtent of reaction



The reaction A → B is conducted in an isothermal batch reactor. If the conversion of A increases linearly with holding time, then the order of the reaction is __________________?


a0


b1


c1.5


d2


View Answer 0

The space time is equivalent to the holding time in a steady state mixed reactor for_____________________?


aNon-isothermal gas reaction


bVariable fluid density systems


cConstant fluid density systems


dGas reactions with changing number of moles



For a zero order reaction, the concentration of product increases with the _____________________?


aIncrease of reaction time


bIncrease in initial concentration


cTotal pressure


dDecrease in total pressure



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