(a(i))[1]
Explain why graphite is able to conduct electricity in the solid state.
(a(ii))[2]
Complete the dot-and-cross diagram in Fig. 3.1 for a molecule of oxygen. Show only the outer shell electrons.
(a(iii))[2]
Deduce the physical state of carbon monoxide at -195^{\circ}C. Use the information in Table 3.1 to support your answer.
(a(iv))[3]
Explain, using structure and bonding, why graphite has a much higher melting point than carbon monoxide.
(b)[2]
Potassium and chlorine react to make potassium chloride. Write a symbol equation for this reaction.
(c(i))[2]
State the meaning of electrolysis.
(c(ii))[2]
Write an ionic half-equation for oxygen being produced at the anode.