\(a.\)
\(Na+H_2O\rightarrow NaOH+\dfrac{1}{2}H_2\)
\(NaOH:\text{natri hidroxit}\) => Bazo
\(H_2:\text{hidro}\)
\(K_2O+H_2O\rightarrow2KOH\)
\(KOH:\text{ kali hidroxit}\) => Bazo
\(Cl_2+H_2O⇌HCl+HClO\)
\(HCl:\text{ axit clohidric}\) => Axit
\(HClO:\text{ axit hipocloro}\) => Axit
\(SO_2+H_2O⇌H_2SO_3\)
\(H_2SO_3:\text{Axit sunfurơ}\) => Axit