solid
liquid
combination of solid & liquid
neither solid nor liquid
✅ The correct answer is option C.
Chemical Engineering MCQs
Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
nylon-66
teflon
polyester
bakelite
✅ The correct answer is option B.
The process involved in converting rubber into a thin sheet or coating it on fabric is called
extrusion
mastication
calendering
vulcanisation
✅ The correct answer is option C.
Gutta parcha rubber is
soft & tacky at room temperature.
an isomer of natural rubber.
a thermosetting resin.
recovered by coagulation of rubber latex.
✅ The correct answer is option B.
The only natural thermoplastic resin, which is a product of animal life is
rosin
shellac
amber
copal
✅ The correct answer is option B.
Polycaprolactum is
nylon-6
nylon-66
dacron
rayon
✅ The correct answer is option A.
Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding
glycerol
nitro cellulose
camphor
none of these
✅ The correct answer is option C.
Non sulphonated hard bakelites are not used for making
ion-exchange resins
fountain pen barrels
formica table tops
combs
✅ The correct answer is option A.
Elastomers are
thermosetting material.
exemplified by protein derivatives.
having high flexural strength.
having very high tensile strength and heat resistance.
✅ The correct answer is option C.
Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
-20
50
250
500
✅ The correct answer is option B.