Illinois Wastewater Class 4 Practice Test 2026 – Complete Exam Prep

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How much heavier is gaseous chlorine compared to air?

1.5 times

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2.5 times

Gaseous chlorine is approximately 2.5 times heavier than air. This is an important characteristic because it affects how chlorine behaves when released into the atmosphere. Since chlorine is denser than air, it tends to accumulate in low-lying areas rather than disperse quickly upward. This property is particularly relevant for safety considerations in environments where chlorine is used or stored, as leaks or spills can result in hazardous conditions due to the concentration of chlorine gas at ground level. Understanding the density relationship of chlorine to air is crucial for operational safety and emergency response measures in wastewater treatment facilities and other industrial settings where chlorine is frequently utilized.

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