What effect does chlorine have on silver?

Chlorine can react with silver to form silver chloride, which is a compound that has a white color when it is formed. However, when exposed to light or certain environmental conditions, silver chloride can decompose and can give silver a tarnished appearance, leading to the formation of black silver sulfide on the surface. This blackening effect occurs because of the long-term presence of chlorine or chlorides, which can lead to tarnishing and discoloration.

In this context, the correct answer highlights the practical and observable effect of chlorine on silver. Understanding this interaction is crucial for anyone working in environmental health as it underscores the importance of material compatibility and the effects of chemical exposure. Proper handling of both chlorine and silver in environmental or health settings could mitigate such reactions and their consequences.