Answer:
The correct answer is:
a) the original container
Explanation:
When dispensing chemicals, it is important to use caution, proper techniques, and appropriate equipment to prevent accidents or contamination. If excess quantities of chemicals are not needed or used, they should not be put back into the original container. This is because doing so could contaminate the entire stock of the chemical in the original container, affecting its purity and potentially causing unintended reactions or hazards.
Instead, excess quantities of chemicals should be disposed of properly according to safety guidelines and local regulations. This might involve disposing of them in designated waste containers or following specific disposal procedures established for the particular chemical.
