Q20 / 150 · MHT CET 2011 · Chemistry

Ziegler-Natta catalyst catalyses preparation of which of the following compounds?

  • A
    Preparation of Ti-metal
  • B
    Preparation of low density plastic
  • C
    Preparation of high resistance plastic
  • Correct answer
    D
    Preparation of high density plastic

Solution

High density polythene (or plastic) is prepared by heating ethylene at about $330-350 \mathrm{~K}$, under a pressure of $1-2$ atm and in the presence of Ziegler-Natta catalyst. $$ n \mathrm{CH}_{2}=\mathrm{CH}_{2} \frac{330-350 \mathrm{~K}, 1-2 \mathrm{~atm}}{\text { Ziegler-Natta catalyst }}+\mathrm{CH}_{2}-\mathrm{CH}_{2} \rightarrow_{n} $$ high density polythene

Hence, the correct answer is option: 'D'.

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