Question

Classify each of the following reactions as combination, decomposition, displacement or double displacement:
(i) 2Al + Fe2O3 → Al 2O 3 + 2Fe
(ii) 2KClO 3 → 2 KCl + 3O2
(iii) BaCl2 + Na2SO 4 → BaSO 4 + 2NaCl
(iv) CaO + H2O →Ca(OH)2 + Al2O3 + 2Fe​

Answer 1

Answer:

1. It is a displacement reaction as Al being more reactive than Fe idsplaces it from its solution.
2. It is a decomposition reaction as KClO3 decomposes into Kcl and O2.
3. It is a Double Displacement reaction as In the solution the cations and anions mutually exchange their places.
4. The reactions should be CaO + H2O →Ca(OH)2. It is a combination reaction.

Answer 2

first : displacement reaction

second: decomposition reaction

third : double displacement reaction

fourth: combination reaction