What does the electrolysis of this molten compound give? 

Sodium chloride, $\mathrm{NaCl}$.

What does the electrolysis of this molten compound give?  

Aluminium oxide, ${\mathrm{Al}}_2{\mathrm{O}}_3$.

What does the electrolysis of this molten compound give?  

Calcium fluoride, ${\mathrm{CaF}}_2$. 

What does the electrolysis of this molten compound give?  

Lead sulphide, $\mathrm{PbS}$. 

Name the products at each electrode, when this aqueous solution is electrolysed using an inert electrode: 

a concentrated solution of magnesium chloride, ${\mathrm{MgCl}}_2$. 

Name the products at each electrode, when this aqueous solution is electrolysed using an inert electrode: 

concentrated hydrochloric acid, $\mathrm{HCI}$. 

Name the products at each electrode, when this aqueous solution is electrolysed using an inert electrode: 

a dilute solution of copper$\left(\mathrm{II}\right)$ sulphate, ${\mathrm{CuSO}}_4$. 

Give the half-equation for the reaction at the anode, during the electrolysis of molten potassium chloride.