BioMedical Admissions Test (BMAT) 2025 – 400 Free Practice Questions to Pass the Exam

Chlorine is accurately described as a dense, poisonous green gas. This characterization is grounded in its physical and chemical properties. Chlorine exists as a diatomic molecule (Cl₂) and has a distinct greenish-yellow color, which makes it easily recognizable. It is about 2.5 times denser than air, which is significant in its behavior; in confined spaces, it can accumulate at ground level, posing a serious inhalation hazard.

The toxicity of chlorine is primarily due to its corrosive nature and the harmful effects it has on respiratory tissues when inhaled. It can cause severe irritation and damage to the respiratory tract, leading to symptoms like choking, coughing, and difficulty breathing. This is particularly relevant for anyone working in environments where chlorine is used, such as in the chemical industry or in water treatment facilities.

In summary, the description of chlorine as a dense, poisonous green gas encapsulates its hazardous nature and physical characteristics, making it the correct choice. The other options, which either mischaracterize its color, density, or toxicity, do not accurately represent chlorine's properties.