The formation of brown ring in the reaction between nitrates, conc. `H_2SO_4` and `FeSO_4` involves
The formation of brown ring in the reaction between nitrates, conc. `H_2SO_4` and `FeSO_4` involves
A. oxidation of nitric oxide to nitrogen dioxide
B. reduction of ferrous sulphate to iron
C. reduction of nitrate to nitric oxide
D. oxidising property of sulphuric acid
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Correct Answer - C
`Fe^(2+)` ion has a tendency to reduce `NO_3^- ` to nitric oxide NO `(N^(2+))` in presence of conc. `H_2SO_4`.
`NO_3^(-) + 3Fe^(2+) + 4H^(+) to NO+ 3Fe^(3+) + 3H_2O`
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