Mastering Liquid Nitrogen: 20 MCQs on Applications and Safety Measures

1. Question: What is the primary criterion used to classify a chemical as hazardous?

   • A. Color
   • B. Toxicity
   • C. Odor
   • D. Density

   Solution: B. Toxicity

   Explanation: The primary criterion for classifying a chemical as hazardous is based on factors such as toxicity, flammability, reactivity, and corrosiveness.

2. Question: Which regulatory framework provides a standardized approach to classifying and communicating the hazards associated with chemicals on a global scale?

   • A. National Hazardous Chemical Classification (NHCC)
   • B. International Chemical Safety Standard (ICSS)
   • C. Globally Harmonized System of Classification and Labeling of Chemicals (GHS)
   • D. Chemical Hazard Communication Network (CHCN)

   Solution: C. Globally Harmonized System of Classification and Labeling of Chemicals (GHS)

   Explanation: GHS provides a globally recognized system for classifying and labeling chemicals, ensuring consistency in hazard communication.

3. Question: What is a common health risk associated with lead (Pb) exposure?

   • A. Respiratory irritation
   • B. Cardiovascular issues
   • C. Developmental delays
   • D. Allergic reactions

   Solution: C. Developmental delays

   Explanation: Lead exposure can lead to developmental delays, neurological issues, and other health problems.

4. Question: What does PPE stand for in the context of handling hazardous chemicals?

   • A. Personal Prevention Equipment
   • B. Protective Productive Equipment
   • C. Personal Protective Equipment
   • D. Proper Protection Essentials

   Solution: C. Personal Protective Equipment

   Explanation: PPE refers to personal protective equipment, which includes items like gloves, eye protection, respirators, and protective clothing.

5. Question: Which chemical is known for its use in the production of plastics and resins and is associated with an increased risk of leukemia?

   • A. Benzene
   • B. Methanol
   • C. Asbestos
   • D. Hydrogen Cyanide

   Solution: A. Benzene

   Explanation: Benzene exposure is associated with an increased risk of leukemia and other blood disorders.

6. Question: What is the primary health risk associated with exposure to carbon monoxide (CO)?

   • A. Respiratory irritation
   • B. Poisoning
   • C. Allergic reactions
   • D. Neurological issues

   Solution: B. Poisoning

   Explanation: Carbon monoxide exposure can lead to poisoning and, in severe cases, death.

7. Question: Which chemical is often used in water disinfection and can lead to liver and kidney damage?

   • A. Chloroform
   • B. Mercury
   • C. Methane
   • D. Hydrogen Cyanide

   Solution: A. Chloroform

   Explanation: Chloroform exposure can lead to liver and kidney damage and has been associated with certain cancers.

8. Question: What is the primary property of asbestos that poses a health risk?

   • A. Flammability
   • B. Radioactivity
   • C. Corrosiveness
   • D. Respirable fibers

   Solution: D. Respirable fibers

   Explanation: Asbestos exposure can lead to lung diseases such as asbestosis and mesothelioma due to the inhalation of respirable fibers.

9. Question: What is the primary health risk associated with exposure to hydrogen cyanide?

   • A. Respiratory irritation
   • B. Neurological issues
   • C. Liver and kidney damage
   • D. Fatality and respiratory failure

   Solution: D. Fatality and respiratory failure

   Explanation: Hydrogen-cyanide exposure can be fatal and cause respiratory failure.

10. Question: Which chemical is commonly found in certain paints, pipes, and contaminated water and can cause neurological issues?

    • A. Benzene
    • B. Lead (Pb)
    • C. Mercury
    • D. Asbestos

    Solution: B. Lead (Pb)

    Explanation: Lead exposure can lead to developmental delays, neurological issues, and other health problems.

11. Question: What is the primary property of formaldehyde that may cause respiratory irritation?

    • A. Flammability
    • B. Reactivity
    • C. Toxicity
    • D. Volatility

    Solution: C. Toxicity

    Explanation: Formaldehyde exposure may cause respiratory irritation and has been classified as a human carcinogen.

12. Question: Which chemical is a byproduct of water disinfection and can cause liver and kidney damage?

    • A. Chloroform
    • B. Mercury
    • C. Methane
    • D. Hydrogen Cyanide

    Solution: A. Chloroform

    Explanation: Chloroform exposure can lead to liver and kidney damage and has been associated with certain cancers.

13. Question: What is the primary health risk associated with exposure to methanol?

    • A. Respiratory irritation
    • B. Neurological issues
    • C. Blindness
    • D. Liver damage

    Solution: C. Blindness

    Explanation: Methanol exposure can cause neurological issues, blindness, and other health problems.

14. Question: Which chemical is commonly found in certain industrial solvents and alcohol-based products?

    • A. Benzene
    • B. Methanol
    • C. Hydrogen Cyanide
    • D. Carbon Monoxide

    Solution: B. Methanol

    Explanation: Methanol is found in some industrial solvents and alcohol-based products.

15. Question: What is the primary health risk associated with exposure to pesticides (e.g., organophosphates)?

    • A. Respiratory irritation
    • B. Neurotoxic effects
    • C. Liver damage
    • D. Cardiovascular issues

    Solution: B. Neurotoxic effects

    Explanation: Some pesticides can have neurotoxic effects and may be associated with developmental issues.

16. Question: Which gas, produced by incomplete combustion, can lead to poisoning and, in severe cases, death?

    • A. Hydrogen Cyanide
    • B. Methane
    • C. Carbon Dioxide
    • D. Carbon Monoxide

    Solution: D. Carbon Monoxide

    Explanation: Carbon monoxide exposure can lead to poisoning and, in severe cases, death.

17. Question: What is the primary health risk associated with exposure to mercury, often through contaminated fish consumption?

    • A. Respiratory irritation
    • B. Cardiovascular issues
    • C. Neurological issues
    • D. Liver damage

    Solution: C. Neurological issues

    Explanation: Exposure to mercury can affect the nervous system and cause developmental issues.

18. Question: What is the primary health risk associated with exposure to asbestos?

    • A. Liver and kidney damage
    • B. Respiratory irritation
    • C. Cardiovascular issues
    • D. Neurological issues

    Solution: B. Respiratory irritation

    Explanation: Asbestos exposure can lead to lung diseases such as asbestosis and mesothelioma.

19. Question: What is the primary health risk associated with exposure to benzene?

    • A. Liver and kidney damage
    • B. Respiratory irritation
    • C. Increased risk of leukemia
    • D. Neurological issues

    Solution: C. Increased risk of leukemia

    Explanation: Benzene exposure is associated with an increased risk of leukemia and other blood disorders.

20. Question: What is the primary health risk associated with exposure to formaldehyde?

    • A. Respiratory irritation
    • B. Increased risk of leukemia
    • C. Liver and kidney damage
    • D. Cardiovascular issues

    Solution: A. Respiratory irritation

    Explanation: Formaldehyde exposure may cause respiratory irritation and has been classified as a human carcinogen.

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