The color of chlorine gas (Cl₂) is ?

Chlorine (Cl₂) is a halogen element in Group VII A of the periodic table. One of its most notable physical properties is its characteristic color. Elemental chlorine gas is observed as greenish yellow under normal conditions, which differentiates it from other halogens such as fluorine (pale yellow) or iodine (violet-black solid).

The greenish yellow color of chlorine is due to the absorption of light in the visible spectrum. Chlorine molecules absorb blue light more strongly, and the reflected or transmitted light appears greenish yellow to the human eye. This color is a key physical property used for identification in laboratory and industrial settings.

Chlorine is also a toxic and reactive gas. Its greenish yellow color serves as a warning in chemical handling. Chlorine gas has a pungent odor and is heavier than air, allowing it to accumulate in low-lying areas if released. Its color intensity can slightly vary depending on the concentration and pressure of the gas, appearing darker in higher concentrations.

Besides its distinctive color, chlorine is highly reactive, forming compounds with metals and non-metals. It is widely used in the manufacture of bleaching agents, disinfectants, PVC plastics, and other chemical industries. The greenish yellow appearance of chlorine gas is often the first observable property chemists notice when preparing or storing the gas.

In conclusion, the color of chlorine gas (Cl₂) is greenish yellow, which is a simple yet important physical property. Understanding this property is essential in inorganic chemistry for proper identification, safety, and handling of chlorine gas in laboratory and industrial applications