(a(i))
Using the structures, suggest why the electrical conductivity of silicon is lower than that of graphite.
(a(ii))[2]
Using the structures, suggest why the electrical conductivity of tin is greater than that of germanium.
(b(i))
Using data from the Data Booklet where appropriate, write an equation for the effect of heat on $\text{PbO}_2(s)$.
(b(ii))
Using data from the Data Booklet where appropriate, write an equation for $\text{PbO}_2(s) + \text{HCl}(aq)$.
(b(iii))
Using data from the Data Booklet where appropriate, write an equation for $\text{SnO}(s) + \text{NaOH}(aq)$.
(b(iv))[4]
Using data from the Data Booklet where appropriate, write an equation for $\text{GeCl}_4(l) + \text{H}_2\text{O}(l)$.