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(A) The brown ring test is a standard laboratory test used to detect the presence of the nitrate ion $(NO_3^-)$ in a solution.In this test, freshly pr

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$NO_3^{-}$

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(A) The brown ring test is a standard laboratory test used to detect the presence of the nitrate ion $(NO_3^-)$ in a solution.In this test, freshly prepared ferrous sulfate $(FeSO_4)$ solution is added to the aqueous solution containing nitrate ions, followed by the careful addition of concentrated sulfuric acid $(H_2SO_4)$ along the sides of the test tube.$A$ brown ring is formed at the interface of the two layers due to the formation of the nitroso-ferrous sulfate complex.The chemical reactions involved are:$2HNO_3 + 3H_2SO_4 + 6FeSO_4 \rightarrow 3Fe_2(SO_4)_3 + 2NO + 4H_2O$$[Fe(H_2O)_6]SO_4 + NO \rightarrow [Fe(H_2O)_5(NO)]SO_4 + H_2O$

The brown ring test is used to detect the presence of which of the following ions?

Similar Questions

Sodium salt solution $+ \, AgNO_3$ solution $\to$ Coloured precipitate: If the coloured precipitate is soluble in both dilute $HNO_3$ and excess concentrated $NH_3$ solution,then which of the following anions is present in the salt solution?

Assertion $(A) :- Fe^{+3}$ is not used in the brown ring test for $NO_3^{-}$.
Reason $(R) :-$ Reduction of $NO_3^{-}$ takes place during the test.

Which of the following ions will not give a precipitate with $AgNO_3$?

$AgNO_3$ gives a red precipitate with:

On addition of conc. $H_2SO_4$ to a chloride salt,colourless fumes are evolved,but in the case of an iodide salt,violet fumes are observed. This is because:

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