Chemical Engineering MCQs

Page No. 352

Pick out the wrong statement regarding the solubility characteristics of high polymers?


aGreater the degree of cross-linking in the polymer, lesser is its solubility

✖


bPolymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents

✖


cSwelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent

✖


dHigh molecular weight polymers on dissolving gives solution of very low viscosity

✓



SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at_________________?


a1: 3

✓


b3 : 1

✖


c1 : 2

✖


d2 : 1

✖


View Answer 1: 3

A copolymer of vinyl and vinylidene chloride is called_____________________?


aTreylene

✖


bOrlon

✖


cSaran

✓


dDacron

✖


View Answer Saran

Poly-methyl-methacrylate (PMMA) is known as_______________?


aBakelite

✖


bTeflon

✖


cPerspex

✓


dNylon-6

✖


View Answer Perspex

Molecular weights of plastics ranges from_______________?


a1000 to 5000

✖


b5000 to 1000

✖


c20000 to 25000

✓


d109 to 1011

✖


View Answer 20000 to 25000

In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ?


aBakelite (phenol formaldehyde)

✓


bPolyester

✖


cPolythene

✖


dNylon-6

✖



Polyvinyl alcohol is used as a___________________?


aCation/anion exchanger

✖


bWater soluble adhesive

✓


cTextile fibre

✖


dNon-sticky coating on frying pans

✖



Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________?


aPhenol

✖


bNaphthalene

✖


cBenzene

✓


dPyridine

✖


View Answer Benzene

The conversion of caprolactam in the above case is about ____________ percent?


a25

✖


b50

✖


c70

✖


d90

✓


View Answer 90

Styrene butadiene rubber (SBR) as compared to natural rubber has_______________?


aPoor tensile strength

✖


bPoorer resistance

✖


cGreater amount of heat build up heavy loading

✖


dAll A., B. and C.

✓


View Answer All A., B. and C.

Goto Page No.

Page 352 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