Multiple Choice
Which of the following statements about handling broken glass in the laboratory is correct?
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4. BONUS: Lab Techniques and Procedures
Laboratory Materials
Multiple Choice
Which of the following statements about handling unused chemicals in the laboratory is correct?
A
Unused chemicals should be poured down the sink unless otherwise instructed.
B
It is safe to return all unused chemicals to their original containers.
C
Unused chemicals should never be returned to their original containers to avoid contamination.
D
Unused chemicals can be mixed together before disposal.
Verified step by step guidance1
Step 1: Understand the importance of proper chemical handling in the laboratory to ensure safety and prevent contamination or hazardous reactions.
Step 2: Recognize that unused chemicals should never be poured down the sink unless explicitly instructed, as this can cause environmental harm or dangerous reactions in plumbing.
Step 3: Know that returning unused chemicals to their original containers is unsafe because it can contaminate the stock chemical, potentially causing hazardous reactions or compromising future experiments.
Step 4: Be aware that mixing different unused chemicals before disposal is dangerous because unknown reactions may occur, producing toxic gases or explosions.
Step 5: Conclude that the correct practice is to follow specific disposal instructions for each chemical and never return unused chemicals to their original containers to avoid contamination.
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