Related Questions

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
Low density polythene as compared to high density polythene is
A Harder
B Tougher
C Chemically inert
D More flexible
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
Density of low density polythene is about __________ gm/c.c.
A 0.38
B 0.56
C 0.81
D 0.91
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these
Manufacture of phthalic anhydride uses __________ as a catalyst.
A Ni
B Cr
C V2O5
D Al2O3
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?
A NH3
B NaCl
C CaO
D Coke
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
A High cost
B Fragile nature
C Easy poisoning tendency
D All of the above

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