Final answer:
The statement about treating all lab chemicals as dangerous is true (a). Laboratory safety protocols mandate considering all chemicals potentially hazardous and employing a range of safety measures, including using fume hoods, strict handling instructions, and proper safety equipment to prevent accidents and exposure.
Step-by-step explanation:
The statement that 'all chemicals in the lab are to be considered dangerous' is true. It is a fundamental rule of laboratory safety to treat all chemicals as potentially hazardous until proven otherwise. This precautionary principle helps protect against unforeseen risks such as fumes, flammability, or toxic reactions. It is essential to follow safety guidelines like using fume hoods, avoiding direct inhalation of vapors, handling flammable substances with care, and adhering to proper use of safety equipment. Moreover, never eating or drinking in the lab, keeping a safe distance from heat sources, and being vigilant about cleaning are all part of creating a safe laboratory environment.
Scientists and students must follow stringent safety practices, such as avoiding skin contact with chemicals, never working alone, checking chemical safety data, adhering strictly to experiment instructions, and ensuring proper management of heat sources like Bunsen burners. During experiments, it is critical to be alert, use protective gear, and communicate with the instructor or supervisor if any unusual situation occurs. By respecting these safety rules, individuals can greatly minimize the risk of accidents and exposure to dangerous substances.