Polymer Technology
Catalyst used in the production of high density polythene by low pressure Ziegler process is

Nickel
Platinum
Aluminium triethyl activated with TiCl₄
Molybdenum

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Polymer Technology
Pickout the wrong statement.

Polymers made of only one monomer is called homopolymer
Vulcanised rubber is more elastic than natural rubber
Polymers made of more than one monomer is called copolymer or mixed polymer
The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres

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Polymer Technology
Thermocole (expanded polystyrene) is not used for

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

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