Arrange the chemical reactions given below in the table under the heads combination reaction, decomposition, displacement reactions and double decomposition.
(a) 2KCl → 2K + Cl2
(b) CaCO3 → CaO + CO2
(c) 2Hl → H2 + l2
(d) KCl + AgNO3 → AgCl + KNO3
(e) Mg + 2HCl → MgCl2 + H2
(f) 2H2 + O2 → 2H2O
(g) Mg + H2SO4 → MgSO4 + H2
(h) Na2SO4 + BaCl2 → BaSO4 + 2NaCl