Are chemical hazards always visible?

• A. Chemical hazards are always detected by their color.
• B. Yes, all chemical hazards can be seen with the naked eye.
• C. Chemical hazards are only visible when they are in liquid form.
• D. No, some chemical hazards are invisible and cannot be detected by sight alone.

Answer: (D)

Verified step by step guidance

1. Understand that chemical hazards refer to properties of substances that can cause harm to health, safety, or the environment.
2. Recognize that not all chemical hazards have visible indicators such as color, odor, or physical state that can be detected by the naked eye.
3. Consider examples of invisible hazards, such as toxic gases (e.g., carbon monoxide) or colorless, odorless vapors, which pose risks without any visible signs.
4. Learn that detection of some chemical hazards requires specialized instruments or sensors rather than relying on visual observation alone.
5. Conclude that chemical hazards are not always visible, and safety protocols must account for invisible dangers to ensure proper handling and protection.