Question

give one example of each
1=combination reaction of an element and a compound
2=double decomposition reaction ​

Answer 1

Answer:

Na+Cl= NaCl is combination reaction

Answer 2

Answer:

1) combination reaction : CaO(s)(Quick lime) + H2O(l) → Ca(OH)2 (Slaked lime)

2) double decomposition reaction : Ca(OH)2 + 2 NH4Cl → CaCl2 + 2 NH4OH