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
High molecul ar weight polymers on dissolving gives solution of very low viscosity
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

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Polymer Technology
Synthetic rubber

Is softer at higher temperature
Is brittle at low temperature
Deforms, if stretched to double of its original dimension
Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases

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