Распредели реакции по группам

\(\mathrm{2H\_2O\_2=2H\_2O+O\_2}\) , \(\mathrm{3H\_2+N\_2=2NH\_3}\) , \(\mathrm{2SO\_2+O\_2=2SO\_3}\) , \(\mathrm{Zn+2HCl=ZnCl\_2+H\_2}\) , \(\mathrm{CaCO\_3=CaO+CO\_2}\) , \(\mathrm{2Cu+O\_2=2CuO}\)