A. Produces high density polythene
B. Uses no catalyst
C. Produces low density polythene
D. Employs very high pressure
Related Mcqs:
- 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 - Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?
A. 7 kgf/cm2 and 70 °C
B. 1000 kgf/cm2 and 100°C
C. 7 kgf/cm2 and 700°C
D. 1 kgf/cm2 (gage) and 70°C - Zeigler – Natta catalyst (AlR3 – AlCl3) is used in the polymerisation of_________________?
A. Vinyl acetate
B. Vinyl chloride
C. Propylene
D. Styrene - Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is_______________________?
A. Ni
B. V2O5
C. Fe
D. Aluminium triethyl combined with titanium tetrachloride - The conversion of caprolactam in the above case is about ____________ percent?
A. 25
B. 50
C. 70
D. 90 - Nylon-6 as compared to nylon 66 has lower ?
A. Abrasion resistance
B. Thermal stability
C. Adhesion to rubber
D. Hardness - Buna-S is also known as_________________?
A. Teflon
B. PTFE
C. SBR
D. Polycrylates - Pick out the wrong statement ?
A. Polymeric fibres are never produced by addition polymerisation
B. Property of tackiness is exhibited by uncured rubber
C. Sharp melting point is not observed in thermoplastic polymers
D. Polythene generally has an excellent resistance to ultra violet rays - The only natural thermoplastic resin, which is a product of animal life is ____________________?
A. Rosin
B. Shellac
C. Amber
D. Copal - Size range of polymer molecules varies from __________ meter?
A. 10-2 to 10-5
B. 10-4 to 10-7
C. 10-1 to 10-2
D. 10-8 to 10-10
