A person repeatedly exposed to a chemical over a long period may develop:

• A. Etiological changes.
• B. Acute health hazard.
• C. Chronic health hazard.
• D. Chemical asphyxia.

Answer: (C)

When exposure to a chemical happens repeatedly over a long period, the health effects tend to develop gradually and may last long after the exposure ends. This is because the body experiences a cumulative dose, possible accumulation in tissues, and ongoing irritation or damage to organs. Over time, these processes can produce conditions like cancer, chronic lung or liver disease, or reproductive or neurological problems. In other words, the harm isn’t immediate but builds up and can be long-lasting, which defines a chronic health hazard.

This differs from an acute health hazard, which involves effects that occur soon after a single or short-term exposure—things like irritation, dizziness, or chemical burns. Chemical asphyxia refers to a specific mechanism where a gas prevents the body from getting oxygen, usually in acute situations, not the general outcome of long-term exposure. Etiological changes isn’t a standard way to describe the typical health effects from chronic chemical exposure.