Which safety rule is most important when smelling the product of a chemical reaction?
a. hold with tongs.
b. use a wafting motion.
c. wear closed-toed shoes. eliminate
d. keep nose directly above open container.?

b. use a wafting motion.

Explanation:

While in the lab, it is very important to remember that some chemicals can be dangerous. When we smell a chemical, we run the risk of damaging our mucous membranes or our lungs. The right way to smell chemicals to avoid risk is by cupping your hand above the container and using a wafting motion. Moreover, if the instructions are to only use a chemical inside a fume hood, make sure that you do not use it anywhere else.

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