Problem 43 - A Complete Resource Book in Chemistry for JEE Main

Question

Teflon is a polymer of (a) tetrafluorethylene (b) tetraiodoethylene (c) tetrabromoethylene (d) tetrachloroethylene

Step-by-Step Solution

Answer

Teflon is a polymer of tetrafluoroethylene (option a).

Step 1: Identify the chemical formula of Teflon

Teflon is the brand name for a polymer made from tetrafluoroethylene, which is a chemical compound with the formula \( C_2F_4 \). This indicates it is a polymer formed from molecules with two carbon atoms and four fluorine atoms.

Step 2: Recognize the structure of the options

Analyze the chemical structure of each option:(a) Tetrafluoroethylene: \( C_2F_4 \)(b) Tetraiodoethylene: \( C_2I_4 \)(c) Tetrabromoethylene: \( C_2Br_4 \)(d) Tetrachloroethylene: \( C_2Cl_4 \)

Step 3: Relate Teflon to its polymer

Teflon is indeed the polymer of tetrafluoroethylene, as previously noted, because it is the only option that matches the chemical composition \( C_2F_4 \) needed for Teflon formation.

Key Concepts

Tetrafluoroethylene

Tetrafluoroethylene is a key compound in the world of polymer chemistry. It serves as the monomer for creating Teflon, a widely used polymer known for its non-stick properties. The unique aspect of tetrafluoroethylene is its composition: it contains two carbon atoms and four fluorine atoms, represented in the chemical formula as \( C_2F_4 \). This configuration gives it distinct properties that are essential for forming Teflon.

Tetrafluoroethylene is a colorless gas under standard conditions and is highly reactive due to the strong carbon-fluorine bonds. These strong bonds provide stability to the polymers made from it, giving Teflon its high resistance to heat, chemicals, and electricity. Such properties make tetrafluoroethylene-derived polymers invaluable in creating household and industrial products that require durability and reliability.

C2F4 Chemical Structure

Understanding the \( C_2F_4 \) chemical structure is crucial in grasping how Teflon and similar polymers work. The structure consists of two carbon atoms connected by a double bond, each carbon atom bonded to two fluorine atoms. This double bond is essential as it allows the monomers to link together, forming long chains in a process known as polymerization.

The presence of fluorine atoms is a game-changer in the structural integrity of \( C_2F_4 \). Fluorine has a high electronegativity, meaning it tends to attract electrons strongly. This results in the formation of very stable bonds with carbon, leading to a robust and inert polymer. These characteristics make Teflon non-reactive with most chemicals and resistant to corrosion. Moreover, these features contribute to Teflon's trademark slippery surface, which is why it's often used for non-stick coatings on cookware.

Polymer Chemistry

Polymer chemistry is the study of molecules that form large, chain-like structures by linking together smaller molecules, or monomers. This branch of chemistry plays a critical role in developing materials that offer a variety of functions, from everyday items to highly specialized products.

When discussing Teflon, polymer chemistry reveals how monomers like tetrafluoroethylene (-\[ C_2F_4 \]-) undergo a process called polymerization. During polymerization, the double bonds in these monomers open up to form new bonds with adjacent monomers, creating a continuous, repeating chain, or polymer.

This process can be controlled to produce polymers with various characteristics and applications. In the case of Teflon, the polymerization of tetrafluoroethylene results in a material that's particularly useful due to its remarkable properties. It is resistant to heat and chemicals, making it ideal for use in cookware, cable insulation, and even fabric protectors. The impeding of raw monomers ensures the reliable performance of the resulting polymer, demonstrating the impact of polymer chemistry in technology and daily life.