Answer: the correct answer is B. The reaction IS NOT REDOX because it DOES HAVE oxidation number changes.
Step-by-step explanation:
The oxidation number of nitrogen (N) in NH3 is -3, and in (NH4)2SO4, it is -3.
- The oxidation number of hydrogen (H) in NH3 is +1, and in (NH4)2SO4, it is also +1.
- The oxidation number of sulfur (S) in H₂SO4 is +6, and in (NH4)2SO4, it is +6.
- The oxidation number of oxygen (O) in H₂SO4 is -2, and in (NH4)2SO4, it is -2.
Upon careful analysis, you can observe that the oxidation number of nitrogen increases from -3 in NH3 to -3 in (NH4)2SO4. This indicates an oxidation (increase in oxidation number) of nitrogen.