What are the symbols for toxic, corrosive, and radioactive hazards and what are common lab accidents and their causes?

Here are the answers to your questions:

Question 1:
This is the symbol for toxic hazard. Chemicals with this symbol can cause death or severe injury if ingested, inhaled, or absorbed through the skin.

Question 2:
This is the symbol for corrosive hazard. Chemicals with this symbol can cause severe burns to skin and eyes, and can damage materials.

Question 3:
This symbol is for radioactive hazard. Chemicals with this symbol suggest the presence of ionizing radiation which can cause cell damage and cancer.

Question 4: Complete the table below about common accidents in the laboratory and their possible causes.

• 1. Cuts:
  • Possible cause: Sharp objects like scalpels, Broken glassware, Improper handling of sharp tools.
• 2. Burns:
  • Possible cause: Hot liquids or steam, Corrosive chemicals, Open flames, Hot surfaces.
• 3. Scalds:
  • Possible cause: Hot liquids or steam.
• 4. Ingestion of harmful substances:
  • Possible cause: Eating or drinking in the laboratory, Improper labeling of chemicals, Pipetting by mouth, Contaminated hands.
• 5. Falls:
  • Possible cause: Slippery floors, Obstacles in walkways, Loose cables.
• 6. Electric shock:
  • Possible cause: Touching open electrical sockets, Damaged electrical cords, Wet hands operating electrical equipment.

Question 5: The following table shows the items in a First Aid Kit and their uses. Fill in the table with the called one use of the item.

• 1. Cotton wool:
  • One use of the item: Cleaning wounds or applying antiseptics.
• 2. Antiseptics:
  • One use of the item: Disinfecting wounds to prevent infection.
• 3. Soap/Wipes:
  • One use of the item: Cleaning hands or minor wounds.
• 4. Gloves:
  • One use of the item: Protecting the first aider from contamination.
• 5. Bandages:
  • One use of the item: Covering wounds, applying pressure to stop bleeding, or supporting injured limbs.
• 6. Medical scissors:
  • One use of the item: Cutting bandages or cutting clothing to access wounds.
• 7. Plaster:
  • One use of the item: Covering small cuts and abrasions.