Chemical Engineering MCQs

Page No. 565

Velocity of a chemical reaction___________________?


aDecreases with increase in temperature


bIncreases with increase of pressure of reactants for all reactions


cDecreases with increase of reactant concentration


dNone of these


View Answer None of these

Shift conversion reaction_________________?


aConverts N2 and H2 into NH3


bConverts CO to CO2 with steam


cIs non-catalytic


dIs highly exothermic



The conversion for a second order, irreversible reaction (constant volume) as shown in the bellow figure, in batch mode is given by______________?


a1/(1 + k2 . CA0 . t)


b(k2 . CA0 . t)/ (1 + k2 . CA0 . t)


c(k2 . CA0 . t)2/ (1 + k2 . CA0 . t)


d(k2 . CA0 . t)/ (1 + k2 . CA0 . t)2



Find a mechanism that is consistent with the rate equation and reaction given below ? 2A + B → A2B, ( – rA) = k.CA.CB


aA + B ⇌ AB; AB + A → A2B


bA + B → AB; AB + A → A2B


cA + A → AA; AA + B → A2B


dA + A ⇌ AA; AA + B → A2B



The catalytic converter for conversion of SO2 to SO3 by contact process should have a feed with SO2 content between___________________?


a2-5 %


b7-10 %


c12-15 %


d20-25 %


View Answer 7-10 %

For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to ____________________?


a0


b1


c0.1


d0.5


View Answer 0.1

The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of „E/R’ is __________________?


a8987°K


b9210°K


c8764°K


d8621°K


View Answer 9210°K

Most important characteristics of gas-liquid reactors are the________________?


aSpecific inter-facial area


bLiquid hold-up


cBoth A. and B.


dNone of these


View Answer Both A. and B.

The reaction between oxygen and organic material is a/an _____________ reaction?


aExothermic


bEndothermic


cBiochemical


dPhotochemical


View Answer Exothermic

Which of the following is not a theory of homogeneous reaction ?


aCollision theory and activated complex theory


bChain reaction theory


cRadiation hypothesis


dNone of these


View Answer None of these

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