In the test of NO_3^- ion,a dark brown ring c | vedclass

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(D) The brown ring test for nitrate ions involves the reaction of $NO_3^-$ with $Fe^{2+}$ in the presence of concentrated $H_2SO_4$ to form the comple

Vedclass · Accepted Answer

Iron has $+2$ oxidation state and $NO$ is neutral.

Vedclass · Answer

(D) The brown ring test for nitrate ions involves the reaction of $NO_3^-$ with $Fe^{2+}$ in the presence of concentrated $H_2SO_4$ to form the complex $[Fe(H_2O)_5NO]SO_4$.In this complex,the iron is in the $+1$ oxidation state $(Fe^+)$ and the nitric oxide ligand is present as $NO^+$.Therefore,the statement that 'Iron has $+2$ oxidation state and $NO$ is neutral' is incorrect.The brown colour arises due to charge transfer spectra.

In the test of $NO_3^-$ ion,a dark brown ring complex is formed. Which of the following statements is incorrect regarding this complex?

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