Which of the following should not be placed in a fume hood? A Strong reducing agents B Acids and bases C Any part of my body other than my arms D Volatile liquids
The correct answer and explanation is:
Correct Answer: C) Any part of my body other than my arms
Explanation (300 words):
A fume hood is a vital piece of laboratory safety equipment designed to protect users from inhaling hazardous vapors, gases, or dust. It works by drawing air away from the user and filtering or expelling it outside the building. Proper usage is essential to ensure safety.
Option A: Strong reducing agents – These chemicals, such as sodium borohydride or lithium aluminum hydride, are reactive and may release gases. They are appropriate for use inside a fume hood because the hood safely vents any potentially harmful fumes.
Option B: Acids and bases – Corrosive substances like hydrochloric acid and sodium hydroxide can produce harmful vapors or splashes. Using a fume hood minimizes the risk of inhalation and exposure, so this is also appropriate.
Option D: Volatile liquids – Volatile liquids like acetone, ether, or benzene easily evaporate and can create flammable or toxic vapors. A fume hood is specifically designed to contain and vent these vapors safely. Therefore, placing volatile liquids in a fume hood is not only appropriate but recommended.
Option C: Any part of my body other than my arms – This is the correct answer because placing your head, torso, or entire upper body inside a fume hood is dangerous and against lab safety protocol. The sash (glass window) of the fume hood is intended to act as a protective barrier. The only parts of the body that should enter the hood during normal operation are the hands and forearms, and even then, only as necessary. Leaning into the hood reduces airflow efficiency, potentially exposing the user to harmful substances.
In summary, while chemicals like acids, bases, reducing agents, and volatile liquids should be placed in a fume hood for safe handling, placing your head or upper body inside the hood puts you at serious risk and defeats the purpose of the equipment.