Question

The monomers of biodegradable polymer, nylon 2-nylon 6 are:
A. glycine + adipic acid
B. glycol + phthalic acid
C. phenol + urea
D. glycine + amino caproic acid

Answer 1

Hint: Nylon 2-nylon 6 is a condensation polymer. It is a result of polyamide copolymerization of two monomers, one has both amino group and carboxylic acid and another is a derivative of amino acid lysine.

Complete step by step answer:
Polymerization is a process in which small molecules, known as monomers combine chemically to produce a very large network molecule which is called a polymer.
Monomers are the molecules that are bonded to other molecules to form a polymer.
There are two monomers of Nylon 2-nylon 6 named as Glycine $\left( \text{Gly} \right)$ with chemical formula $\left( {{\text{H}}_{2}}\text{NC}{{\text{H}}_{2}}\text{COOH} \right)$ and Amino caproic acid has the chemical formula $\left( {{\text{C}}_{6}}{{\text{H}}_{13}}{{\text{O}}_{2}}\text{N} \right)$. The reaction of both gives the polymer nylon 2-nylon 6 after removal of water molecules from the reactants.

A condensation polymerization is in which monomers react with each other to form larger structural units while releasing water or methanol as by-product.
Biodegradable polymers are a type of polymer that breaks down by bacterial decomposition to result in natural by-products such as gases $\left( \text{C}{{\text{O}}_{2}},{{\text{N}}_{2}} \right)$, water and biomass.
The correct answer of this question is the monomers of biodegradable polymer, nylon 2-nylon 6 are glycine and amino caproic acid.

option ‘d’ is correct

Additional Information:
Applications of Nylon 2-nylon 6 are:
(1) It is used in synthesis of artificial fibers.
(2) Used to make strings of musical instruments and threads in bristles for toothbrushes.

Note:
Glycine is the only achiral amino acid. As glycine has two groups attached to it as the same which is two hydrogen atoms are attached to it. But the coming compounds of amino acids groups will have one hydrogen atom to be replaced with other groups. Like, Alanine has methyl group instead of hydrogen atom; $\text{C}{{\text{H}}_{3}}\text{CHN}{{\text{H}}_{2}}\text{COOH}$.