In the laboratory, students often learn to analyze mixtures of the common positive and negative ions, seperating and confirming the presence of the particular ions in the mixture. One of the first steps in such an analysis is to treat the mixture with hydrochloric acid, which precipatets and removes silver ion, lead (II) ion, and mercury (I) ion from the aqueous as the insoluble cho, ride slats. Write balanced net ionic equations for the precipitation reactions of these three cations with chloride ion.

i'm pretty sure its b i might be wrong though!

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.