Answered

Question 3:
Explain why the air hole of a Bunsen burner should be closed before the gas is lit.

Question 4:
State a hazard for each of the following when working with a Bunsen burner:
1. Open flame
2. Hot equipment
3. Gas leaks



Answer :

GinnyAnswer

Final answer:

The air hole of a Bunsen burner should be closed before lighting it to ensure safety and efficiency. Hazards when using a Bunsen burner include igniting flammable materials and the risk of burns.


Explanation:

Before lighting a Bunsen burner, the air hole should be closed to prevent gas buildup and ensure a proper flame structure. This helps in controlling the amount of air mixed with the gas, leading to a more efficient and safer combustion process.

Hazards when working with a Bunsen burner:

  1. Hazard: Igniting flammable materials. Precaution: Keep flammable items away from the flame.
  2. Hazard: Burns due to proximity to the flame. Precaution: Tuck in loose clothing, tie back long hair, and work in a well-ventilated area.

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