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

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

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Polymer Technology
Identify the group in which all the polymers mentioned can be used to make fibres.

Cellulose derivatives, Polyisoprene, Polyethylene
Butadiene copolymers, Polyamides, Urea aldehyde
Polypropylene, Poly vinyl chloride, Silicon
Cellulose derivatives, Polyamides, Polyurathane

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