Which of the following shall not be followed when boiling a solution in a hot plate?

• A. Make Sure That The Glass Ware Being Used Is Heat Resistant.
• B. Inspect The Glass Ware For Cracks Before Putting It In The Hot Plate.
• C. Add Boiling Stones To Facilitate Boiling.
• D. When Removing The Heated Material, Used Polyethylene Gloves To Protect Your Hand From Heat.

Answer: (D)

Safe handling of hot equipment on a hot plate requires gloves and tools that actually withstand heat. The practice of using polyethylene gloves when removing heated material should not be followed because polyethylene is not heat resistant and can melt or deform at boiling temperatures, risking burns or contamination. Instead, use heat-resistant gloves or insulated mitts, or tongs designed for high temperatures, to protect your hands.

The other precautions are appropriate: confirm the glassware is heat resistant to avoid cracking, inspect for cracks before heating, and add boiling stones to promote steady boiling and prevent bumping. When you remove heated material, rely on proper heat-tolerant PPE and tools to stay safe.