Question

well done, you have proven that you know how to work in a lab. what do you have to do before leaving the lab, to make sure you dont carry traces of chemicals outside? a) .tell your supervisor b) wash your hands and then remove your lab coat c) take off your lab coat and wash your hands d) turn off the main power

Explanation:

To avoid carrying chemical traces outside the lab, you first remove the lab coat (which may have chemical residues on its outer surface) to prevent contaminating your regular clothes, then wash your hands to remove any chemical traces on your skin. Telling a supervisor or turning off power does not address removing chemical traces from yourself. Washing hands first then removing the lab coat risks getting clean hands contaminated by the coat's outer surface.

Answer:

c) Take off your lab coat and wash your hands