Chemistry of Persistent Organic Pollutants
Chemistry ⇒ Environmental Chemistry
Chemistry of Persistent Organic Pollutants starts at 11 and continues till grade 12.
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See sample questions for grade 12
A sample of soil contains 100 mg of a POP. If the half-life of the POP is 10 years, how much will remain after 30 years?
Describe how POPs can affect the endocrine system in humans and wildlife.
Describe one method used to remediate environments contaminated with POPs.
Describe the environmental impact of POPs on aquatic ecosystems.
Describe the process of biomagnification as it relates to POPs.
Describe the role of the Stockholm Convention in controlling POPs.
Explain the difference between bioaccumulation and biomagnification in the context of POPs.
Explain the term 'lipophilicity' and its significance in the context of POPs.
Explain why incineration is used as a method for destroying POPs and mention one limitation of this method.
Explain why POPs are considered a global environmental issue.
Explain why POPs tend to bioaccumulate in the food chain.
Explain why the chemical stability of POPs contributes to their persistence in the environment.
Explain why the use of DDT was banned or restricted in many countries.
Name two health effects associated with exposure to POPs.
A river is contaminated with a mixture of two POPs: Compound X (half-life = 5 years) and Compound Y (half-life = 20 years). If both compounds start at 200 mg/L, calculate the concentration of each compound after 10 years.
A scientist is studying the breakdown of a POP in a laboratory setting. She observes that after 15 years, only 12.5% of the original amount remains. What is the half-life of the POP?
Describe the role of molecular chlorine in the formation of dioxins during the combustion of organic materials.
Explain how the molecular structure of polychlorinated biphenyls (PCBs) contributes to their environmental persistence and toxicity.
Explain why the Arctic region, despite being far from industrial sources, often shows high concentrations of POPs in its wildlife.
