MTEL General Science (64) Practice Questions - MTEL General Science (Field 64) Exam

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Which of the following is the most important laboratory safety practice when heating a substance in a test tube over a flame?

Point the open end of the test tube away from yourself and others Point the open end of the test tube toward yourself to observe the reaction Seal the test tube tightly before heating Hold the test tube with bare fingers for better control

Correct Answer:

Point the open end of the test tube away from yourself and others

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