Natural and Synthetic like Polythene, Nylon, Polyesters, Bakelite, Rubber — Prelims Strategy

Prelims Strategy

To excel in NEET questions on natural and synthetic polymers, a systematic approach is key. First, create a comprehensive table or flashcards for each polymer mentioned (Polythene, Nylon, Polyesters, Bakelite, Natural Rubber). For each entry, clearly note:

1
Monomer(s): — Memorize the chemical names and, if simple, their structures. Pay special attention to polymers with two monomers (e.g., Nylon-6,6, Terylene).
2
Type of Polymerization: — Clearly distinguish between addition and condensation polymerization. Remember that condensation polymerization always involves the elimination of a small molecule (usually water).
3
Classification: — Is it natural or synthetic? Thermoplastic or thermosetting? Elastomer, fiber, or plastic?
4
Key Properties: — Note 2-3 distinctive properties (e.g., elasticity for rubber, high tensile strength for nylon, rigidity for Bakelite).
5
Major Uses: — Link each polymer to its primary applications (e.g., polythene for bags, Bakelite for switches).

For numerical problems (though rare), ensure you understand the concept of degree of polymerization. For conceptual questions, read each option carefully. Trap options often involve confusing monomers of similar-sounding polymers (e.

g., Nylon-6 vs. Nylon-6,6) or misclassifying polymers based on their thermal behavior. Practice identifying the repeating unit from a given polymer structure and vice-versa. Focus on understanding *why* a polymer has certain properties based on its structure and bonding, rather than just rote memorization.