Chemical Engineering MCQs

Page No. 353

The synthetic fibres produced from _____________ are known as rayon?


aLignin


bCellulose


cPolyamides


dEthylene glycol


View Answer Cellulose

____________ polymer is used for making unbreakable crockery?


aThermoplastic


bMelamine


cAddition


dNone of these


View Answer Melamine

Neoprene is the trade name of________________?


aPolyurethane


bPhenol formaldehyde


cPolychlorophrene


dStyrene butadiene rubber (SBR)


View Answer Polychlorophrene

Polythene is a/an________________?


aAddition polymerisation product


bCondensation polymerisation product


cThermosetting material


dNone of these



Mastication of rubber means_______________?


aIts softening


bA treatment to retard its deterioration due to oxidation


cImproving its curing rate


dDepression of its freezing point


View Answer Its softening

Which of the following types of polymers has the strongest inter particle forces ?


aElastomers


bFibres


cThermoplastics


dThermosetting polymers



Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?


aAmmonium alum


bPotassium alum


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Nylon-6 as compared to nylon-66 is_________________?


aHarder


bMore abrasion resistant


cHaving higher melting point


dNone of these


View Answer None of these

Polypropylene compared to polythene is___________________?


aHarder


bStronger


cLighter


dAll A., B. and C.


View Answer All A., B. and C.

Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is_________________?


aChloroethane


bChloroprene


cIsoprene


dNone of these


View Answer Chloroprene

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