Question

question 1 (mandatory) (0.5 points)
safety goggles must be worn in front of the eyes at all times whenever you are in a laboratory, even when you have finished the experiment and are working on calculations.
true
false
question 2 (mandatory) (0.5 points)
contact lenses or prescription glasses are adequate protection for your eyes in the lab.
true
false
question 3 (mandatory) (0.5 points)
if you have taken too much of a reagent, the excess should be returned to the container.
true
false

Explanation:

Question 1

In a laboratory, safety goggles are required to protect eyes from potential hazards (like chemical splashes, debris) at all times, including when doing calculations after experiments. So the statement is True.

Contact lenses or regular prescription glasses do not provide adequate eye protection in a lab. Safety goggles are needed as they shield the eyes from all angles against lab hazards. So the statement is False.

Returning excess reagent to the container can contaminate the entire reagent supply. Excess reagent should be disposed of properly (following lab waste disposal protocols). So the statement is False.

Answer:

True

Question 2