Electrolysis

Which apparatus could be used to electroplate an iron nail with copper? 

The diagram shows a method used to copper-plate a pan

Which equation represents the reaction at the cathode?

Which apparatus is used to plate a nickel object with silver?

Which metal could not be used for electroplating by using an aqueous solution?
 

The diagram shows apparatus for plating a spoon with silver.
Which statement is not correct?

Iron can be electroplated with zinc to make it resistant to corrosion. Which row about electroplating iron with zinc is correct?

$$\begin{array}{|c|c|c|c|} \hline & \begin{array}{c} \text { positive electrode } \\ \text { (anode) } \end{array} & \begin{array}{c} \text { negative electrode } \\ \text { (cathode) } \end{array} & \text { electrolyte } \\ \hline \text { A } & \text { iron } & \text { zinc } & \text { iron nitrate } \\ \text { B } & \text { iron } & \text { zinc } & \text { zinc nitrate } \\ \text { C } & \text { zinc } & \text { iron } & \text { iron nitrate } \\ \text { D } & \text { zinc } & \text { iron } & \text { zinc nitrate } \\ \hline \end{array}$$