131. Poly Vinyl chloride (PVC) is a __________ material.
thermoplastic
thermosetting
fibrous
chemically active
✅ The correct answer is option A.
Polymer Technology MCQs
132. Zeigler process
produces high density polythene.
uses no catalyst.
produces low density polythene.
employs very high pressure.
✅ The correct answer is option A.
133. In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of
cross linked polystyrene.
phenol formaldehyde resins.
polyesters.
polyamides.
✅ The correct answer is option A.
134. In condensation polymerisation as compared to addition polymerisation
the monomers are unsaturated compounds.
no co-product is lost.
the monomers contain two functional groups.
generally only one monomer is involved
✅ The correct answer is option C.
135. Transistor parts and refrigerator components are normally made of
polystyrene
polyester
high density polythene
polyurathane
✅ The correct answer is option A.
136. Commercial production of polypropylene employs __________ polymerisation.
emulsion
suspension
solution
bulk
✅ The correct answer is option C.
137. Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are
50°C and 3 – 4 kg/cm2
50°C and 1 kgf/cm2
250°C and 10 kgf/cm2
250°C and 1 kgf/cm2
✅ The correct answer is option A.
138. In nylon-6, the number 6 represents the total number of
carbon atoms in the ring.
carbon atoms in the linear polymer chain.
nitrogen atoms in the ring.
hydrogen atoms in the ring.
✅ The correct answer is option B.
139. __________ fibres are made of polyamides.
Dacron
Nylon
Rayon
Orion
✅ The correct answer is option B.
140. Polycaprolactum (Nylon – 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.
50
75
90
99
✅ The correct answer is option C.