Which gas can irritate the eyes?

Chlorine is known for its strong and pungent smell, and it is primarily used in water treatment processes for disinfection. When chlorine is present in the air, even at low concentrations, it can cause irritation to the eyes and respiratory system. The gas reacts with moisture in the eyes, forming hydrochloric acid, which leads to burning sensations and discomfort. This irritative effect is one of the reasons for stringent safety measures around chlorine usage in wastewater treatment facilities.

In contrast, while amphetamine may have various health effects, it is not typically associated with eye irritation. Hydrogen, being a colorless and odorless gas, does not possess properties that cause eye discomfort. Similarly, ozone, though it can cause respiratory problems, primarily affects the lungs rather than directly causing eye irritation like chlorine does. Understanding these characteristics emphasizes the need for caution while handling chlorinated substances, as they can have immediate and harmful effects on health, particularly at treatment plants.