The Importance and Dangers of Chlorine

Chlorine is a significant chemical element with the atomic number 17, represented by Cl. It is a yellow-green gas at room temperature and is widely used as a disinfectant. Chlorine's most common compound is sodium chloride (NaCl), known as common salt, which has been used since ancient times. Another important compound is hydrochloric acid, used in various industries despite its corrosive nature. Chlorine has beneficial uses but can also be dangerous, as seen in its use as a chemical weapon during World War I.

Describe the uses and dangers of hydrochloric acid.

How was chlorine used as a chemical weapon during World War I?