Chemical Engineering MCQs

Page No. 578

Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually ________________ the concentration of catalyst, if it does not entail a chain mechanism?


aProportional to


bIndependent of


cInversely proportional to


dProportional to the square of


View Answer Proportional to

Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?


aIncreases


bRemains unchanged


cDecreases


dUnpredictable from the data


View Answer Decreases

For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single_______________?


aCSTR of volume V


bPFR of volume V


cCSTR of volume V/X


dPFR of volume V/X


View Answer PFR of volume V

The irreversible reaction, X → Y, is the special case of the reversible reaction, X ⇌ Y, in which the _____________________?


aEquilibrium constant is infinite


bFractional conversion of ‘A’ at equilibrium is unity


cConcentration of ‘A’ at equilibrium is zero


dAll A., B. and C.


View Answer All A., B. and C.

Half life period of decomposition of a liquid ‘A’ by irreversible first order reaction is 12 minutes. The time required for 75% conversion of ‘A’ is _____________ minutes?


a18


b24


c6


d12


View Answer 24

The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A → R, is___________________?


a0.5


b-0.5


c1


d1.5


View Answer -0.5

For a heterogeneous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate – rA0 is invariant with total pressure. The rate controlling step is______________________?


aSurface Kc/(1 + TS) reaction between absorbed A and B in the gas phase


bSurface reaction between absorbed A and absorbed B


cSurface reaction between A in the gas phase and absorbed B


dDesorption of C


View Answer Desorption of C

Arrhenius equation represents graphically the variation between the ______________ and temperature?


aRate of reaction


bFrequency factor


cRate constant


dActivation energy


View Answer Rate constant

The extent of a reaction is ___________________?


aDifferent for reactants and products


bDimensionless


cDepends on the stoichiometric co-efficient


dAll of the above


View Answer All of the above

For the reversible reaction A ⇌ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium ?


a0.253


b0.338


c0.152


d0.637


View Answer 0.338

Goto Page No.

Page 578 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