Question

When heating a test tube, what precautions should be taken to prevent accidents?

1) Avoid pointing the open end at yourself or others
2) Wear gloves and use tongs when handling hot objects
3) Ensure the laboratory is well-ventilated
4) Extinguish all flames after the experiment

Answer 1

When heating a test tube, it is important to take precautions such as avoiding pointing the open end at yourself or others, wearing gloves and using tongs when handling hot objects, ensuring proper ventilation, and extinguishing flames afterwards.

Step-by-step explanation:

When heating a test tube, there are several precautions that should be taken to prevent accidents. Firstly, avoid pointing the open end of the test tube at yourself or others to prevent potential splashing of hot contents. Secondly, always wear gloves and use tongs when handling hot objects to protect your hands from burns. Thirdly, ensure that the laboratory is well-ventilated to prevent the build-up of harmful gases. Finally, extinguish all flames after the experiment to eliminate any fire hazards.