Q31 / 160 · AP EAMCET 2023 (18 May Shift 1) · Chemistry

Identify the correct statement from the following with respect to high density polythene

  • Correct answer
    A
    $\mathrm{TiCl}_4$ and $\mathrm{Et}_3 \mathrm{Al}$ used as catalyst for preparation
  • B
    Obtained by the polymerization of ethene at $350-570 \mathrm{~K}$
  • C
    Has highly branched structure
  • D
    Chemically active

Solution

Ziegler-Natta catalyst $\left(\mathrm{TiCl}_4+\mathrm{Et}_3 \mathrm{Al}\right)$ is used for the preparation of high-density polythene. Branching reduces the density so high-density polythene has low degree of branching. HDPE is chemically inert and is prepared in the temperature range of $333 \mathrm{~K}$ to $343 \mathrm{~K}$.

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

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