Question

Amongst the following, identify the condensation polymer/s:
(A) Bakelite
(B) Teflon
(C) Melamine formaldehyde resin
(D) Nylon-2 nylon-6
(E) Buna-S
Choose the correct answer from the options given below:

• A. (B) and (E) only
• B. (A), (C), and (D) only
• C. (C) and (D) only
• D. (A), (B), and (E) only

Hint:

Condensation polymers are formed by the reaction between two different monomers with the elimination of a small molecule like water or methanol. Bakelite, Melamine formaldehyde resin, and Nylon are examples of condensation polymers.

Answer 1

The Correct Option is B

Condensation polymers are formed by the reaction between two monomers with the elimination of a small molecule such as water or methanol. Let's analyze each option: - Bakelite (A) is a condensation polymer formed by the reaction between phenol and formaldehyde. It is not addition polymerization, hence it is a condensation polymer. The reaction is: \[ \text{Phenol} + \text{Formaldehyde} \xrightarrow{\text{Heat}} \text{Bakelite} + H_2O \] - Teflon (B) is an addition polymer, not a condensation polymer. It is formed by the polymerization of tetrafluoroethylene (TFE), so this is not a condensation polymer. - Melamine formaldehyde resin (C) is a condensation polymer formed by the reaction between melamine and formaldehyde. The reaction proceeds as follows: \[ \text{Melamine} + \text{Formaldehyde} \xrightarrow{\text{Heat}} \text{Melamine-formaldehyde resin} + H_2O \] - Nylon-2 nylon-6 (D) is a condensation polymer formed by the reaction between glycol and adipic acid, which forms a polyamide. The reaction is: \[ \text{Glycol} + \text{Adipic acid} \xrightarrow{\text{Heat}} \text{Nylon-2 nylon-6} + H_2O \] - Buna-S (E) is a copolymer formed by the polymerization of butadiene and styrene. It is an addition polymer, not a condensation polymer.
Thus, the correct condensation polymers are Bakelite (A), Melamine formaldehyde resin (C), and Nylon-2 nylon-6 (D).
Therefore, the correct answer is Option (2).