AP EAMCET · Chemistry · Polymers

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

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

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Answer & Solution

Correct Answer

(A) \(\mathrm{TiCl}_4\) and \(\mathrm{Et}_3 \mathrm{Al}\) used as catalyst for preparation

Step-by-step Solution

Detailed explanation

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…

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.

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List- $I$		List- $II$
$(I)$	Vertex	$(A)$	$(- \frac{3}{2}, - 3)$
$(II)$	Focus	$(B)$	$(\frac{3}{2}, - 3)$
$(III)$	Equation of the directrix	$(C)$	$2 x + 5 = 0$
$(IV)$	Equation of the axis	$(D)$	$2 x + y + 3 = 0$
		$(E)$	$y + 3 = 0$
		$(F)$	$(- 2, - 3)$