A. 1000 to 5000
B. 5000 to 1000
C. 20000 to 25000
D. 109 to 1011
Related Mcqs:
- Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ?
A. 50000
B. 51600
C. 49200
D. 50800 - Plasticisers are added to synthetic plastics to ________________?
A. Impart flexibility
B. Improve workability during fabrication
C. Develop new improved properties not present in the original resin
D. All A., B. and C. - _____________ moulding is used for shaping of thermosetting plastics exclusively?
A. Compression
B. Injection
C. Transfer
D. Extrusion - Visco-elastic behaviour exhibited by plastics is a ______________ like behaviour?
A. Solid
B. Liquid
C. Combination of solid & liquid
D. Neither solid nor liquid - Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?
A. 100
B. 150
C. 350
D. 450 - Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________?
A. Phenol
B. Naphthalene
C. Benzene
D. Pyridine - Which of the following low molecular weight (<104), soft & waxy polymer is used in „chewing gum‟ ?
A. Cellulose acetate
B. Polyvinyl acetate
C. Thiokol
D. PVC - Molecular weight of polymers are in the range of__________________?
A. 10 to 103
B. 102-107
C. 107-109
D. 109-1011 - Teflon is__________________?
A. Phenol formaldehyde
B. An inorganic polymer
C. Polytetrafluroethylene (PTFE)
D. A monomer - Low pressure Zeigler process of polythene manufacture____________________?
A. Employs a pressure of 30 kgf/cm2
B. Achieves an yield of 95-98% based on ethylene
C. Produces very low density polythene
D. Does not use any catalyst for polymerisation
