Rayvon is using pipettes to measure out a chemical solution in his experiment. What safety precaution is it MOST important for him to follow?

Question

A. Don’t let the pipettes touch plastic containers.
B. Don’t forcibly expel any hazardous material from the pipettes.
C. Don’t hold the pipettes with his left hand.
D. Don’t expose the pipettes to extreme temperatures.

Answer 1

B. Don’t forcibly expel any hazardous material from the pipettes.