Which term describes chemical agents that persist on surfaces for an extended period?

Which term describes chemical agents that persist on surfaces for an extended period?

• A. Nonpersistent
• B. Persistent
• C. Volatile
• D. Ephemeral

Answer: (B)

Persistence describes how long a chemical agent remains in an area after release, including staying on surfaces. An agent that is persistent lingers on surfaces, resists cleaning, and continues to pose exposure risk over time, which is why this term fits the scenario. Nonpersistent means the agent breaks down or evaporates quickly, so it doesn’t stay on surfaces for long. Volatile refers to how readily a substance becomes vapor, not how long it remains on surfaces. Ephemeral implies a very short duration and isn’t the standard term used for environmental persistence. So, persistent is the correct description for agents that linger on surfaces for an extended period.

Persistence describes how long a chemical agent remains in an area after release, including staying on surfaces. An agent that is persistent lingers on surfaces, resists cleaning, and continues to pose exposure risk over time, which is why this term fits the scenario. Nonpersistent means the agent breaks down or evaporates quickly, so it doesn’t stay on surfaces for long. Volatile refers to how readily a substance becomes vapor, not how long it remains on surfaces. Ephemeral implies a very short duration and isn’t the standard term used for environmental persistence. So, persistent is the correct description for agents that linger on surfaces for an extended period.