Which of the following reactions is possible according to Dalton's atomic theory? View Available Hint(s) Which of the following reactions is possible according to Dalton's atomic theory? 1. N2→O2N2→O2 2. N2+O2→2NON2+O2→2NO 3. CO2→NO2CO2→NO2 4. H2O→H2SH2O→H2S