6.2.1 Chemical Cell

The diagram shows a simple cell.

For which pair of metals would electrons flow from metal $X$ to metal $Y$ ?

$$\begin{array}{l} \begin{array}{|c|c|c|} \hline & \text { X } & Y \\ \hline \text { A } & \text { copper } & \text { iron } \\ \text { B } & \text { copper } & \text { zinc } \\ \text { C } & \text { iron } & \text { zinc } \\ \text { D } & \text { zinc } & \text { iron } \\ \hline \end{array} \end{array}$$

The reactivity series for a number of different metals is shown.
$$\begin{array}{c c c} \text { most reactive }  \longrightarrow   \text { least reactive }\\ \end{array}$$
$$\begin{array}{|c|c|c|c|c|c|} \hline \text { magnesium } & \text { zinc } & \text { iron } & \text { copper } & \text { silver } & \text { platinum } \\ \hline \end{array}$$
The diagram shows different metal strips dipped into an electrolyte.

Which pair of metals produces the highest voltage?

The diagram shows a simple cell.

Which pair of metals produces the largest voltage?

$$\begin{array}{|c|c|c|} \hline & \text { metal P } & \text { metal Q } \\ \hline \text { A } & \text { iron } & \text { copper } \\ \text { B } & \text { magnesium } & \text { copper } \\ \text { C } & \text { magnesium } & \text { zinc } \\ \text { D } & \text { zinc } & \text { copper } \\ \hline \end{array}$$

The diagram shows a simple cell.

Which statement about the process occurring when the cell is in operation is correct?