Question

in lab, you may need to evaluate the odor or smell of a chemical. what is the best way to smell a chemical sample? select one: ○ vigorously shake the sample until the smell travels to you. ○ hold the sample under your nose and slowly sniff. ○ use your hand to gently waft the smell toward you. ○ put your head in a fume hood as you heat the sample in it.

Explanation:

• "Vigorously shake the sample..." is unsafe as it can release more harmful fumes.
• "Hold the sample under your nose..." is dangerous as it exposes you directly to concentrated fumes.
• "Use your hand to gently waft..." is the correct lab technique to safely smell a chemical by directing a small amount of vapor toward you.
• "Put your head in a fume hood..." is unsafe as heating and putting your head in the hood exposes you to fumes and risks injury from heat or chemicals.

Answer:

C. Use your hand to gently waft the smell toward you.