(i) CaCO3(s) +heat → CaO(s) +CO2(g)
CaCO3(s)-(Calcium carbonate)
CaO(s)-(Calcium oxide)
CO2(g)-(Carbon dioxide)
(ii) 2AgCl(s) +Sunlight → 2Ag(s) +Cl2(g)
2AgCl(s)-(Silver chloride)
2Ag(s)-(Silver)
Cl2(g)-(Chlorine)
(iii) 2H2O(l) +Electric current → 2H2(g) +O2(g)
2H2O(l)-(Water)
2H2(g)-(Hydrogen)
O2(g)-(Oxygen)
