Step 1: Understanding the Question:
The question asks us to identify the correct industrial or commercial application of the synthetic polymer Buna-N from the given choices.
Step 2: Detailed Explanation:
Buna-N, also widely known as nitrile rubber, is a synthetic copolymer manufactured by the emulsion polymerization of 1,3-butadiene and acrylonitrile.
Because of its unique chemical composition, it exhibits exceptional resistance to oils, fuel, petroleum hydrocarbons, and various solvents.
Apart from its widespread use in making fuel hoses, seals, gaskets, and aircraft components, its high tensile strength and chemical resistance make it an excellent material for formulating high-performance industrial adhesives, binding agents, and protective sealants.
Looking at the other options: decorative laminates are typically made from melamine-formaldehyde resins, while lenses are crafted using transparent polymers like PMMA.
Step 3: Final Answer:
Buna-N is commercially used to prepare adhesives, matching option (C).