Chemical Engineering MCQs

Page No. 681

Pick out the wrong statement ?


aDDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction


bChloral is obtained by the chlorination of ethyl alcohol


cInsecticides acting on the insects through the respiratory system are called fumigants


dBenzene hexachloride is not a contact insecticide



Pick out the wrong statement?


aEosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action


bSoap powder is prepared by mixing soap with hydrated sodium carbonate


cDetergents differ from soaps in their action in hard water


dTarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc



With increase in temperature, the mutual solubility of two liquids_________________?


aIncreases


bDecreases


cRemains unchanged


dDecreases exponentially


View Answer Increases

H2S present in naphtha reformed gas is removed by absorbing with___________________?


aEthanolamine


bK2CO3


cHCl


dVacuum gas oil


View Answer Ethanolamine

Design calculation for multiple component distillation is done by_________________?


aPonchon-Savarit method


bMcCabe-Thiele method


cEnthalpy concentration method


dTray to tray calculations



Which of the following provides maximum contact surface for a liquid-vapour system ?


aPacked tower


bBubble-cap plate column


cSieve-plate column


dWetted wall column


View Answer Packed tower

Which is not concerned directly with mass transfer ?


aSchmidt number


bSherwood number


cLewis relationship


dFroude number


View Answer Froude number

Raoult’s law does not apply, when the___________________?


aSize of component molecules are not equal


bAttractive forces between like and unlike molecules in the solution are approximately equal


cComponent molecules are non-polar


dChemical combination or molecular association between unlike molecules takes place in the formation of solution



In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in_________________?


aReducing the axial mixing


bIncreasing the rate of extraction


cMaintaining the concentration difference between the two phases


dAll A , B & C.


View Answer All A , B & C.

pertaining to the analogy between equations of heat and mass transfer operations ? 0 Pick out the wrong statement


aSherwood number in mass transfer is analogous to Nusselt number in heat transfer


bPrandtl number in heat transfer is analogous to Schmidt number in mass transfer


cReynolds number in mass transfer is analogous to Grashoff number in heat transfer


dReynolds number remains the same in both heat and mass transfer



Goto Page No.

Page 681 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