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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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.
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?
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?
Which international agreement specifically targets the reduction and elimination of POPs?
(1) Kyoto Protocol
(2) Montreal Protocol
(3) Stockholm Convention
(4) Paris Agreement
Which of the following is a characteristic of organochlorine pesticides?
(1) They degrade rapidly in sunlight
(2) They are highly persistent in the environment
(3) They are highly soluble in water
(4) They are not toxic to humans
Which of the following is a common analytical technique for detecting POPs in environmental samples?
(1) Gas chromatography-mass spectrometry (GC-MS)
(2) UV-Vis spectroscopy
(3) Flame photometry
(4) Titration
Which of the following is a health effect associated with exposure to dioxins?
(1) Skin lesions
(2) Increased bone density
(3) Improved immune function
(4) Enhanced vision
Fill in the blank: Dioxins are a group of chemically-related compounds that are unintentional by-products of __________ processes.
Fill in the blank: PCBs are a group of synthetic organic chemicals containing __________ atoms attached to biphenyl.
Fill in the blank: The abbreviation 'PCB' stands for __________.
Fill in the blank: The chemical structure of DDT contains two __________ rings.
True or False: All POPs are synthetic chemicals.
True or False: DDT is still widely used in agriculture worldwide.
True or False: PCBs were widely used as coolants and insulating fluids in electrical equipment.
True or False: Persistent organic pollutants are characterized by their resistance to environmental degradation.
