Why is the experiment conducted in a fume cupboard?

• A. It releases harmful gases that are poisonous.
• B. It stays too cold.
• C. It is needed to see color changes clearly.
• D. It prevents moisture.

Answer: (A)

When a reaction may release toxic or volatile fumes, a fume cupboard is used to protect you by pulling those dangerous vapours away from your breathing zone and venting them outside the building. This setup reduces the risk of inhaling harmful gases, which is the main safety concern in such experiments. The other options aren’t the purpose of a fume cupboard—cooling the setup, making color changes easier to see, or keeping moisture out aren’t the primary safety goals here.