COMEDK2017ChemistryPractical Chemistry
In the brown ring test, the brown colour of the ring is due to
Options
- Aferrous nitrate
- Bferric nitrate
- Ca mixture of NO and NO ₂
- Dnitrosoferrous sulphate
Correct answer
D. nitrosoferrous sulphate
Step-by-step solution
The brown ring is due to the formation of a brown complex between nitric oxide and Fe ²⁺ ions. NO ₃⁻+3 Fe ²⁺+4 H ⁺ 3 Fe ³⁺+ NO +2 H ₂ O or