Question

${{F}_{2}}C=C{{F}_{2}}$Is a monomer of :
(A) Glyptal
(B) Teflon
(C) Orion
(D) buna-S

Answer 1

Polymers are macromolecules built up by linking together a large number of small molecules. The repeating units in a polymer are linked through strong covalent bonds. Small molecules that combine to form polymer molecules are called monomers. The synthesis of polymers is the polymerization process.

Complete step by step solution:
In Greek, poly means many and mer means unit.
The polymers are classified into many types based on their physical and chemical properties.
The classification of polymers as:
-Based on source
-Based on polymerization
-Based on functionality
-Based on intermolecular forces
Let us discuss polymerization,
Polymerization means a process of preparation of polymers from monomers. Based on the nature of monomers and the structure of polymers, there are two types of polymerization.
(1) Condensation polymerization: the two or more different monomers with different functional groups combine to form a polymer with the formation of small molecules like ${{H}_{2}}O, N{{H}_{3}}$, is known as condensation polymerization.
Example: glyptal is a polymer formed by the condensation polymerization of glycerol and phthalic acid.
(2) Addition polymerization: the two or more same monomers combine to form a polymer without the formation is known as addition polymerization. Due to the structure of the polymer formed as a chain-like structure, this polymerization is also known as chain-growth polymerization.
Examples are polyethylene, Teflon, polyvinyl chloride, etc.
Consider given monomer,
$n({{F}_{2}}C=C{{F}_{2}})\to -{{({{F}_{2}}C-C{{F}_{2}}-)}_{n}}$
This reaction is an example of additional polymerization and the reactant tetra fluoro ethene is a monomer, the product is polymer named poly tetra fluoro ethane, which is named Teflon.
Hence, ${{F}_{2}}C=C{{F}_{2}}$Is a monomer of Teflon.

The correct answer is option B.

Note: Another type of polymerization exists when two or more different monomers involved will form a polymer without releasing small molecules is known as co-polymerization and the polymers are copolymers. For example, Buna-S and Buna-N.