What is Cl2 commonly used for?

Chlorine, represented by the chemical symbol Cl2, is primarily known for its wide-ranging applications, especially in water treatment and sanitation. Choosing option that reflects its prominence in general purposes is accurate, as chlorine is extensively utilized for disinfection in both municipal water supplies and swimming pools. Its role in the production of household cleaning products and bleach further exemplifies its general-purpose utility.

While chlorine has high-tech and specialized applications, such as in the manufacturing of certain chemicals and in industrial processes, the most common and recognizable use of Cl2 remains in general sanitation and water treatment. Therefore, this option captures the primary and most significant use of chlorine, underlining its importance in public health and safety.