Which is not a decomposition reaction? Answer: H2CO3 → CO2 + H2O SO2 → S + O2 2HCl → H2 + Cl2 2NaCl2 → 2NaCl

a. H2CO3 → CO2 + H2O
b. SO2 → S + O2
c. 2HCl → H2 + Cl2
d. 2NaCl2 → 2NaCl