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Combustion reaction
Synthesis
exothermic
rapid oxidation aka combustion aka burning process
Na2O + H2O ---> 2NaOH this is a metal oxide (base) reacting with water to form an alkali
If you meant to type 2CO + O2 -> 2CO2, then this type of reaction is called synthesis because 2 or more reactants are combining to create one product.
NaCl-----------------Na+ + Cl-is a dissociation reaction.
Combustion reaction
decomposition reaction
It is a neutralistion reaction.
neutralisation reaction
That is a synthesis reaction, also called a combination reaction.
The above reaction is a combination type reaction between silver (Ag) and sulfur (S)
This is an oxidation-reduction reaction.
decomposition
Synthesis
It is an eothermic type of reaction.