Select (i) combination reaction, (ii) decomposition reaction and (iii) displacement reaction from the following chemical equations :
(i) ZnCO3 (s) →ZnO( s)+CO2 (g)
(ii) Pb (s) +CuCl2 (aq) →PbCl2 (aq) +Cu (s)
(iii) NaBr(aq)+AgNO3 (aq) →AgBr( s)
+NaNO3(aq)
(iv) H2 (g) +Cl2 (g) →2‌HCl (g)
(v) Fe2O3+2‌Al→Al2O3+2‌Fe
(vi) 3H2(g)+N2(g)→2NH3(g)
(vii) CaCO3 (s)

‌ Heat ‌

→

‌CaO (s) +CO2 (g)