Of all of the unknowns, which compounds can be separated from the unknown mixture by extraction with naoh solution?

The compounds which could be separated from the mixture would be the ones that are soluble to the NaOH solution since they will go to the NaOH and leave the original mixture. It is the solubility of substances that is the property being used in solvent extraction processes.

B. When electrons gain energy, they have the power to move up to a higher energy level in an atom.