Why is it advisable to use tongs when removing a beaker from a laboratory burner?

• A. To avoid burns from the hot beaker
• B. To keep the beaker free from chemical contamination
• C. To ensure the beaker does not spill its contents
• D. To prevent the beaker from breaking due to sudden temperature changes

Answer: (A)

Verified step by step guidance

1. Understand that when a beaker is heated on a laboratory burner, it becomes very hot and can cause burns if touched directly with bare hands.
2. Recognize that using tongs provides a safe way to handle the hot beaker without direct contact, thus protecting your skin from heat injury.
3. Consider that while chemical contamination, spilling, or thermal shock are important concerns, the primary reason for using tongs is safety from burns.
4. Recall that tongs allow you to maintain a safe distance from the heat source and the hot glassware, minimizing the risk of accidents.
5. Conclude that the advisable practice of using tongs is mainly to avoid burns from the hot beaker, ensuring safe laboratory handling.