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Environmental Toxicology MCQs

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1. : Environmental toxicology mainly studies the effects of?





2. : The dose at which a toxic substance kills 50% of a test population is called?





3. : Bioaccumulation refers to?





4. : Which heavy metal is most commonly linked to neurological damage in children?





5. : Which of the following toxins is produced by certain blue-green algae?





6. : The branch of toxicology that deals with the effects of chemicals on ecosystems is called?





7. : Which organ is primarily responsible for detoxification of chemicals in the human body?





8. : Persistent Organic Pollutants (POPs) are dangerous because they are?





9. : Which toxic metal is commonly associated with “Minamata disease”?





10. : The most toxic form of mercury to humans is?





11. : What does the term “carcinogen” refer to?





12. : Which gas is most dangerous in poorly ventilated indoor environments?





13. : Biomagnification means?





14. : DDT is an example of a?





15. : Which organ is most affected by nephrotoxic substances?





16. : The toxic effects of asbestos exposure are mainly on?





17. : “Itai-Itai disease” in Japan was caused by which toxic metal?





18. : The term “teratogen” refers to substances that cause?





19. : Which toxic metal is commonly found in groundwater in South Asia?





20. : The most widely known greenhouse gas with toxic effects at high concentrations is?





21. : Polychlorinated biphenyls (PCBs) are mainly used in?





22. : Which organ is primarily affected by hepatotoxic substances?





23. : Cyanide poisoning primarily affects which system?





24. : The pesticide Bhopal disaster in India involved which toxic chemical?





25. : The concept of “threshold dose” in toxicology refers to?





26. : Radon gas exposure is most strongly associated with?





27. : Which of the following is a neurotoxin?





28. : Phytoremediation is the process of using?





29. : The Stockholm Convention is related to control of?





30. : Which chemical is known as the “silent killer” due to its odorless and colorless properties?





31. : Endocrine disruptors interfere with which system?





32. : The main toxic effect of benzene exposure is?





33. : Which toxic chemical is used in antifreeze and is sweet-tasting but deadly?





34. : The biological half-life of a toxic substance refers to?





35. : Which radioactive element was released in the Chernobyl disaster?





36. : Mercury poisoning from industrial discharge was observed in which Japanese bay?





37. : What type of toxin is aflatoxin, produced by fungi?





38. : Which toxic gas has a characteristic rotten-egg smell?





39. : The toxicity of a chemical depends on?





40. : The unit commonly used to measure toxic gas concentration in air is?





41. : Which of the following is considered an emerging environmental contaminant?





42. : The toxic effects of alcohol are mainly due to?





43. : Which insecticide is known to disrupt the nervous system by inhibiting acetylcholinesterase?





44. : Which metal contaminant is commonly found in batteries and poses health risks?





45. : Which toxic gas caused mass fatalities in Bhopal, India, in 1984?





46. : The process of testing chemicals on animals to evaluate toxicity is called?





47. : Which of the following is a known nephrotoxin?





48. : The safe level of arsenic in drinking water recommended by WHO is?





49. : Lead poisoning is also known as?





50. : Which branch of science studies the adverse effects of chemical substances on living organisms?





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