Answer :
Final answer:
Tongs are advisable when taking a beaker off a laboratory burner to prevent spilling, keep a secure grip on the beaker, and safely handle it when hot.
Explanation:
When using a laboratory burner, it is advisable to use tongs when taking a beaker off the burner for several reasons. First, tongs prevent spilling and ensure that the contents of the beaker do not accidentally pour out. Second, tongs provide a safe and secure grip on the beaker, preventing it from slipping and breaking. Finally, tongs allow you to move the beaker even if it is too hot to touch with your bare hands.
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