The correct option is **B. Synthetic polymers can be designed with specific properties for targeted applications.** ### Detailed Explanation: 1. **Understanding Synthetic Polymers:** - Synthetic polymers are man-made materials created through chemical processes. They are produced by polymerization, where small molecules called monomers are chemically bonded to form long chains. Common examples include plastics like polyethylene, polystyrene, and nylon. - One of the key advantages of synthetic polymers is that they can be engineered to have specific properties. This means that chemists can manipulate the structure of the polymer to achieve desired characteristics such as flexibility, strength, thermal resistance, and chemical resistance. For instance, adding certain additives can enhance the durability of a polymer or make it more resistant to UV light. 2. **Why Option B is Correct:** - The ability to design synthetic polymers with tailored properties allows for their use in a wide range of applications, from packaging materials to medical devices. For example, a polymer used in a medical implant can be designed to be biocompatible, meaning it won’t cause an adverse reaction in the body. - This versatility is a significant advantage over natural biopolymers, which, while they have their own unique properties, are not as easily modified or engineered for specific applications. 3. **Analyzing the Other Options:** - **Option A: Synthetic polymers are always biodegradable and environmentally friendly.** - This statement is incorrect. While some synthetic polymers are designed to be biodegradable (like certain types of polylactic acid), many are not. Traditional plastics, such as polyethylene and polypropylene, can take hundreds of years to decompose and can contribute to environmental pollution. Therefore, this option is misleading as it generalizes synthetic polymers without acknowledging the diversity in their environmental impact. - **Option C: Natural biopolymers have higher thermal stability than all synthetic polymers.** - This statement is also incorrect. While some natural biopolymers, like certain proteins and polysaccharides, can have good thermal stability, many synthetic polymers can be engineered to withstand much higher temperatures. For example, polymers like polyimide and certain fluoropolymers exhibit excellent thermal stability, often surpassing that of natural biopolymers. Thus, this option is not universally true. - **Option D: Synthetic polymers are formed through processes that occur exclusively in living organisms.** - This statement is false. Synthetic polymers are created through industrial processes that do not occur in nature. While natural biopolymers (like proteins, nucleic acids, and polysaccharides) are indeed produced by living organisms, synthetic polymers are made through chemical reactions in laboratories or manufacturing plants. Therefore, this option misrepresents the nature of synthetic polymers. ### Summary of Key Points: - **Synthetic polymers can be engineered for specific applications**, allowing for a wide range of uses. - **Natural biopolymers** are not always more thermally stable than synthetic ones; many synthetic options can outperform them. - **Not all synthetic polymers are biodegradable**; many contribute to environmental issues. - **Synthetic polymers are not formed through biological processes**, distinguishing them from natural biopolymers. This understanding of synthetic versus natural polymers is crucial for anyone studying chemistry, especially in fields related to materials science and environmental chemistry.