Balance and in which category does it fit in? Single or double displacement or synthesis or decomposition?

(a) K2 O → K + O2
(b) Na + I2 → NaI
(c) Cu(NO3 )2 + NaOH → Cu(OH)2 + NaNO3
(d) KClO3 → KCl + O2
(e) Ca(NO3 )2 + HBr → CaBr2 + HNO3
(f) Sn(OH)2 → SnO + H2 O
(g) P4 + N2 O → P4 O6 + N2
(h) Fe + Al2 (SO4 )3 → FeSO4 + Al
(i) AlCl3 + Na2 CO3 → Al2 (CO3 )3 + NaCl
(j) C3 H6 + O2 → CO2 + H2 O