Chlorine gas has a specific gravity of what value?

Study for the WasteWater Operator Certification - Grade 2 Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Chlorine gas has a specific gravity of approximately 2.5. Specific gravity refers to the ratio of the density of a substance to the density of a reference substance, typically water. Since chlorine gas is heavier than air, a specific gravity greater than 1 indicates that it will sink in the atmosphere. This is critical in wastewater treatment and handling chlorine as it informs operators about its behavior in different settings, especially when considering ventilation and the potential for gas buildup in enclosed or poorly ventilated areas.

Understanding the specific gravity of chlorine is vital for safety procedures. The higher the specific gravity, the more caution is needed to manage and monitor for leaks, as the gas will settle in low-lying areas. In terms of the other options, values like 1.5, 3.5, and 0.5 do not accurately reflect chlorine's physical properties; they either suggest a substance that would be lighter or heavier than chlorine gas.

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