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When heating a liquid in a test tube, which of the following safety precautions should you take?. . 1.Wear latex gloves.. 2. Heat the test tube on an open flame if possible.. 3. Put a tight lid on the test tube.. 4. Angle the test tube away from yourself and others..

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4 for sure because you dont want anything spilling on you or others that is harmful.
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The best answer among the choices listed is option 4. It is important to angle the test tube away from yourself and others when heating in order to avoid any danger happening. This is a general rule in laboratory works. Hope this answers your question.

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