Question

msds should be reviewed only after exposure.
true
false
question 8
chemicals that displace oxygen are known as...
asphyxiants
carcinogens
systemic poisons
irritants

Explanation:

• For the first question: MSDS (Material Safety Data Sheet) should be reviewed before exposure, not just after. It provides information about the hazards of a chemical, precautions for safe handling, etc. So the statement "MSDS should be reviewed only after exposure" is false.
• For the second question:
• Asphyxiants are chemicals that displace oxygen. For example, in a confined space, a gas like methane (if present in high concentration) can displace oxygen, leading to oxygen - deficient conditions.
• Carcinogens are substances that can cause cancer.
• Systemic poisons affect the whole body or a major organ system (e.g., heavy metals like lead can be systemic poisons affecting the nervous system).
• Irritants cause local irritation (e.g., to the skin, eyes, or respiratory tract).

Answer:

• First question: B. False
• Second question: A. Asphyxiants