Marco is about to combine the two colored liquids shown below as part of an experiment. He is using a color mixing key to determine if combining the liquids results in the expected color or an unexpected color. The flasks below show four possible results of Marco's experiment. In which three of the flasks has a chemical change most likely happened?

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

ok whats the question if not i cannot you i need question and need a thing to answer

the answer your looking for is c).