Which of the following is NOT a function of chlorine in water treatment?

Chlorine plays a crucial role in water treatment processes, primarily aimed at improving water quality and ensuring its safety for consumption. It is widely used for various functions, including the removal of tastes and odors, oxidation of metals such as iron and manganese, and prevention of algal growth in water bodies.

Increasing water temperature, however, is not a function of chlorine in water treatment. The process of chlorination involves adding chlorine to water, which helps to disinfect and improve the water quality, but it does not have the capability to increase the temperature of the water.

In summary, while chlorine serves multiple essential purposes such as disinfection and controlling contaminants, adjusting the temperature of water is not among its functions in the treatment process.