Texas Class C Wastewater Treatment License Practice Exam 2025 – Complete Preparation

Chlorine gas is characterized by its pungent odor, which is often described as sharp or irritating. This distinctive smell can be recognized even at very low concentrations. Additionally, chlorine is not considered to have low electrical conductivity; rather, it can conduct electricity, especially when dissolved in water.

In understanding the characteristics of chlorine gas, it is important to recognize that while it is indeed a colorless gas, it is not tasteless—thus, the choice claiming it as colorless and tasteless does not accurately describe it. Furthermore, chlorine gas is not heavy and flammable; it is much denser than air but is classified as a non-flammable gas. Lastly, chlorine is definitely not odorless and toxic, as it is well-known for its dangerous effects at certain concentration levels.

Overall, the correct choice highlights the pungent nature of chlorine, an important safety consideration for those working with or around this chemical in wastewater treatment and other applications.