The DOT Hazard Class 2 consists of:

The DOT Hazard Class 2 consists of:

• A. Liquids
• B. Gases
• C. Solids
• D. Powders

Answer: (B)

Gases are the focus here. DOT Hazard Class 2 is designated for gases, including compressed, liquefied, and dissolved forms. This classification emphasizes how the material behaves and is stored—gases can expand, are often kept under pressure in cylinders, and may pose hazards such as asphyxiation, pressure-related risks, or flammability/toxicity depending on the gas. Liquids and solids belong to other hazard classes (for example, liquids are Class 3, while various solids, including powders, fall into other classes). So recognizing that Class 2 is specifically for gases explains why gases is the correct grouping.

Gases are the focus here. DOT Hazard Class 2 is designated for gases, including compressed, liquefied, and dissolved forms. This classification emphasizes how the material behaves and is stored—gases can expand, are often kept under pressure in cylinders, and may pose hazards such as asphyxiation, pressure-related risks, or flammability/toxicity depending on the gas. Liquids and solids belong to other hazard classes (for example, liquids are Class 3, while various solids, including powders, fall into other classes). So recognizing that Class 2 is specifically for gases explains why gases is the correct grouping.