Identify the type of reaction for each chemical equation.

1. Zn+2HCI > ZnCI2+H2
2. CH4+2O2 > CO2 + 2H2O
3. NA2S+2HCI > 2NaCI+H2S
4. H2CO3 > H2O+CO2
5. H2+O2 > H2O

Choices:
Combination
Decomposition
Replacement
Combustion