Related Questions

Low density polythene as compared to high density polythene is
A Harder
B Tougher
C Chemically inert
D More flexible
Density of high density polythene is about __________ gm/c.c.
A 1.18
B 1.05
C 0.95
D 0.99
Catalyst used in the production of high density polythene by low pressure Ziegler process is
A Aluminium triethyl activated with TiCl4
B Platinum
C Molybdenum
D Nickel
Polythene (low or high density) containers are not corroded by
A Sulphuric acid (10%) at room temperature
B Nitric acid (95%) at room temperature
C Sulphur trioxide at 60°C
D Any of these
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
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
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
__________ polythene is most prone to stress-cracking
A High density
B Low density
C Cross-linked
D Linear low density
Polythene is a/an __________ polymerisation product.
A Addition
B Condensation
C Thermosetting
D None of these
Polythene is industrially prepared by the polymerization of-
A Methane
B Styrene
C Acetylene
D Ethylene

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