FeSO4 forms brown ring with________________?
Correct answer: C. NO
- A. N2O3
- B. NO2
- C. NO
- D. N2O
Explanation
The nitrate ion is reduced to NO, which combines with Fe2+ in acidic solution to form the brown nitrosyl complex, commonly represented as [Fe(H2O)5(NO)]SO4. NO2 is the likely wrong choice because it is a nitrogen oxide, but it is not the molecule responsible for the brown-ring complex.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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