The correct option is **C. Nylon and artificial rubber**. ### Explanation of the Correct Answer **Polymerization** is a chemical process in which small molecules called monomers join together to form a larger, more complex structure known as a polymer. This process is fundamental in the production of many materials we use every day, including plastics, fibers, and elastomers. 1. **Nylon**: - Nylon is a synthetic polymer, specifically a type of polyamide. It is created through a process called condensation polymerization, where monomers containing amine and carboxylic acid groups react to form long chains. For example, the reaction between hexamethylenediamine and adipic acid produces nylon-6,6. - The general reaction can be summarized as: \[ n \text{(H}_2\text{N-R-NH}_2) + n \text{(HOOC-R'-COOH)} \rightarrow \text{(R-NH-CO-R')}_n + n \text{H}_2\text{O} \] - Here, R and R' represent hydrocarbon chains, and water is released as a byproduct. 2. **Artificial Rubber**: - Artificial rubber, such as styrene-butadiene rubber (SBR), is produced through addition polymerization. In this process, monomers like styrene and butadiene undergo a reaction where double bonds are broken, allowing them to link together into long chains. - The reaction can be represented as: \[ n \text{(C}_8\text{H}_{8}) + n \text{(C}_4\text{H}_6) \rightarrow \text{(C}_8\text{H}_{8})_n + \text{(C}_4\text{H}_6)_n \] - This results in a flexible, durable material that mimics the properties of natural rubber. ### Why the Other Options Are Incorrect **A. Nylon and soap**: - While nylon is indeed a polymer made through polymerization, soap is not a polymer. Soap is typically produced through a process called saponification, which involves the reaction of fats or oils with a strong base (like sodium hydroxide) to produce glycerol and fatty acid salts (the soap). This process does not involve the formation of long-chain polymers. **B. Ethanoic acid, margarine, and ethanol**: - Ethanoic acid (acetic acid) and ethanol are small organic molecules, and while they can participate in reactions to form larger molecules, they do not undergo polymerization to form polymers. Margarine is a mixture of fats and does not involve polymerization in its production. Instead, it is typically made through the hydrogenation of vegetable oils, which is a different chemical process. **D. Soap and butane**: - As mentioned earlier, soap is not a polymer. Butane is a simple alkane (C₄H₁₀) and does not undergo polymerization to form a polymer under normal conditions. While butane can be used in processes to create larger hydrocarbons, it does not itself form a polymer. ### Summary of Key Points - **Polymerization** is the process of forming polymers from monomers. - **Nylon** is a synthetic polymer made through condensation polymerization. - **Artificial rubber** is produced through addition polymerization of monomers like styrene and butadiene. - Other options either include non-polymers or substances that do not undergo polymerization. ### Revision Summary - Polymerization is the key process for creating polymers. - Nylon and artificial rubber are both products of polymerization. - Soap and butane do not involve polymerization. - Understanding the types of reactions (condensation vs. addition) is crucial for identifying polymers.