Polymer Technology
Thermocole (expanded polystyrene) is not used for

Packing of delicate electronic gadgets
Accoustic control and ceiling for building
High temperature thermal insulation in furnaces
Low temperature thermal insulation as in refrigerator and air conditioners

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

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
Greater the degree of cross-linking in the polymer, lesser is its solubility
Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents

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