Question

\text{The oxidation number of iron in the compound formed during brown ring test for NO}_3^-\text{ ion is \\_\\_\\_\\_\\_\\_.}

Answer 1

In the brown ring test for nitrates, the compound formed is:
$[\text{Fe(H}_2\text{O)}_5(\text{NO})]^{2+}.$

The oxidation number of Fe in this complex is:
$+1$

The Correct Answer is: +1