What are the answers help me pls

1 d. Placing a piece of iron nail in a solution of copper nitrate results in the surface of the iron nail being plated with copper by the reduction of the Cu²⁺ ion in the solution to solid copper which is seen precipitated on the surface of the iron nail

The reaction of the displacement of the copper from the copper (II) nitrate solution by the silver iron in the iron is called a substitution reaction which the NET IONIC equation is given as follows;

Fe(s) + Cu²⁺(aq) → Fe²⁺(aq) + Cu(s)

Explanation:

i would say b

explanation:

but i think i would need more information than that