Which of the following processes employ the presence of Zielger-Natta catalyst?

Preparation of polyacrylonitrile

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Preparation of low density polythene

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Preparation of polytetrafluoroethene

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Preparation of high density polythene

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Solution

The correct option is D Preparation of high density polythene
High density polythene (HDP) is formed when addition polymerization of ethene takes place in a hydrocarbon solvent in the presence of a catalyst such as triethylaluminium and titanium tetrachloride (Ziegler-Natta catalyst) at a temperature of 333 K to 343 K and under a pressure of 6-7 atmospheres.

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