Polymer Technology
Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is

Aluminium triethyl combined with titanium tetrachloride
Fe
V₂O₅
Ni

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Polymer Technology
Pick out the wrong statement regarding the solubility characteristics of high polymers.

Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents
Greater the degree of cross-linking in the polymer, lesser is its solubility
Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent
High molecul ar weight polymers on dissolving gives solution of very low viscosity

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