Answer the following questions.
 
\(AgNO_3\)(aq) + \(NaCl\)(aq) → \(AgCl\)↓ + \(NaNO_3\)(aq)

\(FeS\) + \(H_2SO_4\) → \(FeSO_4\) + \(H_2S\)↑

Consider the above mentioned two chemical equations with two different kinds of arrows ( ↓ and ↑) along with the product. What do these two different arrows indicate?