Question

return all unused chemicals to their original containers. true false work areas should be kept clean and tidy. true false pipets are used to measure and dispense small amounts of liquids. you should draw the liquid into the pipet using your mouth. * true false

Explanation:

• For the first statement: Returning unused chemicals to original containers can contaminate the chemicals. For example, if some foreign substances got into the unused part during the experiment, putting it back would ruin the whole container.
• For the second statement: Keeping work - areas clean and tidy is a basic safety and organization requirement in a laboratory (or similar work environment). It helps prevent accidents (like tripping over clutter) and makes work more efficient.
• For the third statement: Using the mouth to draw liquid into a pipet is extremely dangerous. Chemicals can be accidentally ingested, which can cause serious harm to the body.

Answer:

1. B. False
2. A. True
3. B. False