Asian Sciences Olympiad 2015 — Division M, Level 3 (Years 7–9) Question 14
ASMO Science · Asian Sciences Olympiad 2015 — Division M, Level 3 (Years 7–9)
High level of mercury content was discovered in the river of Minimata city, Japan in 1956. The release of waste water containing mercury compounds by factory was banned by the city council and ordered to clean up the contaminants. What is the main reason to prevent mercury from being discharged into river?
Mercury is toxic and can cause damage to nervous system.
Mercury will cause the river water to be turbid.
Mercury is heavy and will settle down at the river bed.
Mercury is reactive and can cause explosion.