Answer: Minamata disease.
- A Itai-itai disease
- B Black lung disease
- C Minamata disease
- D Fluorosis
Correct answer: C. Minamata disease
Explanation: Minamata disease was first identified in Minamata Bay, Japan in the 1950s. Methylmercury discharged from a chemical plant accumulated in fish; people who ate the fish suffered irreversible neurological damage, tremors, and birth defects. Itai-itai disease is caused by cadmium, not mercury.
Classical smog is a reducing mixture of SO₂ and fog, while photochemical smog is an oxidising mixture generated by UV-driven reactions of NOx and hydrocarbons.
Concept context
Understand how human activities alter the atmosphere, water, and soil. Covers air pollutants, smog types, ozone depletion, acid rain, greenhouse effect, water and soil pollution, and the principles of green chemistry.