Chemistry - Polymer Question with Solution | TestHub

Question Explanation:

The question requires selecting all the correct statements regarding the structure and classification of different types of polymers.

Concept:

This is based on classification of polymers.

Solution:  

1. High density polythene (HDPE) is formed by Ziegler-Natta catalysts and has a regular packing of polymer chains, resulting in a linear polymer.

2. Low density polythene (LDPE) is prepared under high pressure and temperature via free-radical polymerization, leading to significant branching in the polymer chains.

3.Chain growth polymers are formed by the successive addition of monomers to a reactive center (like a free radical, cation, or anion) without the loss of any molecules.

4. Step growth polymers are formed by the condensation reaction between two functional groups, typically with the elimination of small molecules (like H₂O or CH₃OH). They are also known as condensation polymers.

Final Answer: Option (A,B,C,D)