Chemical Reaction Engineering Objective Questions and Answers

22. Sometimes, batch process is preferred over continuous process, when the product

23. A catalyst is said to be a negative catalyst, ifit

B. Reduces the value of equilibrium constant

24. With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)

A. Increases

B. Decreases

C. Remains same

D. Increases linearly

Discussion

25. An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is

A. Maximum at the inlet of the reactor

B. Maximum at the exit of the reactor

C. Maximum at the centre of the reactor

D. Constant throughout the reactor

Discussion

26. Pick out the wrong statement.

A. In a batch reactor, which is exclusively used for liquid phase reactions; temperature pressure and composition may vary with time

B. In a semi-batch reactor, one reactant is charged batchwise, while the other reactant is fed continuously

C. In a continuous flow reactor, uniform concentration can not be maintained throughout the vessel even in a well agitated system

D. In a continuous flow reactor, both the reactants and the products flow out continuously

Discussion

27. In a zero order reaction, reactants concentration does not change with time and the

A. Time for half change is half the time taken for completion of the reaction

B. Time for half change is independent of the initial concentration

C. Time for completion of the reaction is independent of the initial concentration

D. Reaction rate is trebled when the initial concentration is trebled

Discussion

28. The synthesis of proteins and metabolism in biological objects occur in the presence of biocatalyst called

A. A ferment or an enzyme

Chemical Reaction Engineering MCQs