MHT CET · Chemistry · Polymers

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
D Preparation of high density plastic

Verified Solution

Answer & Solution

Correct Answer

(D) Preparation of high density plastic

Step-by-step Solution

Detailed explanation

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

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From MHT CET

Explore more questions on app