Chemical Engineering MCQs

Page No. 582

What is the dispersion number for a CSTR ?


a0


b1


c< 1


d


View Answer

Following isothermal kinetic data are obtained in a basket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes ?


aStrong pore diffusion control and mass transfer not controlling


bBoth pore diffusion and mass transfer not controlling


cBoth pore diffusion and mass transfer controlling


dMass transfer controlling



Catalyst is a substance, which ________________ chemical reaction?


aIncreases the speed of a


bDecreases the speed of a


cCan either increase or decrease the speed of a


dAlters the value of equilibrium constant in a reversible



_____________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst?


aN2


bH2


cCO2


dHe


View Answer N2

The equilibrium constant of a catalytic chemical reaction _______________ due to the presence of?


aIncreases


bDecreases


cRemain unaffected


dUnpredictable from the data


View Answer Remain unaffected

A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is_______________________?


ad(VCA)/dt = -F (CAF – CA) – kCA2V


bd(VCA)/dt = F (CAF – CA) – kCA2V


cd(VCA)/dt = -FCA – kCA2V


dd(VCA)/dt = FCAF – kCA2V



For a first order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the____________________?


aCatalyst size is reduced or the catalyst diffusivity is reduced


bCatalyst size is reduced or the catalyst diffusivity is increased


cCatalyst size is increased or the catalyst diffusivity is reduced


dCatalyst size is increased or the catalyst diffusivity is increased



Batch process is preferred over continuous process, when the___________________?


aProduct yields and quality cannot be achieved in continuous process, because of long residence time


bSales demand of product is not steady


cSame equipment cannot be used for several processes of the same nature


dAll A., B. & C.


View Answer All A., B. & C.

Rate of a chemical reaction is not affected by the____________________?


aCatalyst


bTemperature


cReactant’s concentration


dNumber of molecules of reactants taking part in the reaction



On application of pressure to the equilibrium system, ice ⇌ water; which of the following phenomenon will occur ?


aWater will evaporate


bEquilibrium will not be attained


cMore ice will be formed


dMore water will be formed



Goto Page No.

Page 582 of 843

Alphabetical MCQs Categories

Here below You find all kind of categories of MCQs in alphabetical order.


"Comprehensive Collection of MCQs: Alphabetically Organized by Subject"

"Discover an extensive collection of multiple-choice questions (MCQs) neatly categorized by subject from A to Z. This resource is designed for anyone eager to explore various topics in a straightforward and organized manner. Whether you're a student preparing for exams, an educator seeking supplementary materials, or simply curious about different subjects, this compilation offers a convenient way to learn and assess your knowledge. With questions arranged alphabetically, navigation is effortless, allowing you to delve into subjects of interest at your own pace. Engage, learn, and expand your understanding with this accessible and comprehensive repository of MCQs!"


BolPakistan

bolpakistan.com.pk includes Job Mcqs and Pak Mcqs is the Top Largest Mcqs Forum in World, in which you can read Mcqs of All Subjects, PPSC test preparation, FPSC, NTS and PPSC PAST PAPERS, PPSC PAST MCQS. A Collection of Repeated MCQs for JOBs seekers.

Copyright © 2024, Designed & Developed by BolPakistan