Solution:
To determine which option contains an amide bond, we need to understand the structural components of each option:
- Terylene - Terylene is a polyester, which means it contains ester bonds. Ester bonds are typically formed between an alcohol and a carboxylic acid. So, it does not contain an amide bond.
- Cellulose - Cellulose is a polysaccharide composed of glucose units linked by β(1→4) glycosidic bonds, which are not amide bonds.
- Nylon-6 - Nylon-6 is a type of polyamide. Polyamides are polymers that contain amide bonds (-CONH-) often formed through the condensation polymerization of amines and carboxylic acids. Therefore, Nylon-6 contains amide bonds.
- Polystyrene - Polystyrene is a polymer made from styrene monomers, primarily containing carbon-carbon single bonds. It does not include amide bonds.
Thus, Nylon-6 is the only option containing an amide bond.