An amide bond is a type of covalent bond that forms between a carboxyl group (-COOH) and an amine group (-NH\(_2\)) and is typically seen in proteins, peptides, and synthetic polymers.
- Terylene is a polymer formed from the reaction between terephthalic acid and ethylene glycol, which forms an ester bond.
- Cellulose is a polysaccharide consisting of glucose units linked by ether bonds.
- Nylon-6, on the other hand, is a synthetic polymer that forms through a condensation reaction between a lactam (a cyclic amide) and itself, resulting in the formation of an amide bond (-CO-NH-) in its polymeric structure. Therefore, Nylon-6 contains amide bonds.
- Polystyrene is a synthetic polymer formed by the polymerization of styrene, and it does not contain an amide bond. It contains carbon-carbon bonds.
Thus, the correct answer is (C) Nylon-6 because it contains an amide bond.