Choose the correct combinations:

(A) Nylon 6: Addition copolymer

(B) Buna-S : Addition homopolymer

(C) Melamine: Condensation Copolymer

(D) Teflon: Addition homopolymer

Choose the correct answer from the options given below:

C, D only

The correct answer is option 2. C, D only.

Let us delve into the details of each polymer and the correct classifications:

Polymer Types

Addition Polymers:

These polymers are formed by the addition of monomer units with unsaturated bonds (like double bonds) without the loss of any small molecules. The polymerization involves breaking the double bond in the monomer and forming a new bond with adjacent monomers.

Examples: Polyethylene, polystyrene, and Teflon.

Condensation Polymers:

These polymers are formed by a reaction between monomers with two or more functional groups. During polymerization, small molecules (often water or methanol) are released as byproducts. The formation of the polymer involves the condensation of these functional groups.

Examples: Nylon, polyester, and melamine.

Analysis of Each Polymer

1. Nylon 6:

Nylon 6 is a condensation polymer. It is produced by the ring-opening polymerization of caprolactam, which involves the formation of a polymer through the elimination of water. This is characteristic of condensation polymerization. The polymerization of caprolactam involves the loss of a small molecule (water), which is indicative of condensation reactions.

2. Buna-S (Styrene-Butadiene Rubber):

Buna-S is an addition copolymer. It is made by the copolymerization of styrene and butadiene. In this process, the double bonds in the monomers react to form the polymer without the loss of any small molecules. This process is typical of addition polymerization where monomers with double bonds react to form a polymer.

3. Melamine:

Melamine is a condensation polymer. It is produced by the condensation polymerization of melamine with formaldehyde. During this process, small molecules like water are released. The polymerization involves the formation of melamine-formaldehyde networks with the elimination of water, characteristic of condensation polymerization.

4. Teflon (Polytetrafluoroethylene, PTFE):

Teflon is an addition homopolymer. It is synthesized by the polymerization of tetrafluoroethylene, which involves the breaking of double bonds in the monomer and forming a long chain without the loss of small molecules. This is an example of addition polymerization where the monomer (tetrafluoroethylene) has a double bond that reacts to form the polymer.

The correct pairings based on the above analysis are:

(C) Melamine: Condensation polymer.

(D) Teflon: Addition homopolymer.

Thus, the correct answer to the question, considering the correct classifications of the polymers, is: 2. C, D only.