Which pairing correctly matches the substance to its described use or property in the material?

Which pairing correctly matches the substance to its described use or property in the material?

• A. Sodium — Artificial Rubber
• B. Chlorine — Pool Cleaner
• C. Sodium Chloride — Water
• D. ANFO — Salt

Answer: (A)

Sodium often appears in the production of synthetic rubber because compounds containing sodium can act as initiators or catalysts in polymerization processes that build the long chains giving rubber its stretchy, elastic properties. That makes the pairing with artificial rubber the best match for how the element is described to be used in making a rubbery material. In contrast, chlorine is widely known as a disinfectant for pools, sodium chloride is table salt, water isn’t made of salt, and ANFO is an explosive mixture—not salt. These points don’t align with the described use or property in the material as directly.

Sodium often appears in the production of synthetic rubber because compounds containing sodium can act as initiators or catalysts in polymerization processes that build the long chains giving rubber its stretchy, elastic properties. That makes the pairing with artificial rubber the best match for how the element is described to be used in making a rubbery material.

In contrast, chlorine is widely known as a disinfectant for pools, sodium chloride is table salt, water isn’t made of salt, and ANFO is an explosive mixture—not salt. These points don’t align with the described use or property in the material as directly.