Question

in which reaction does nitrogen exhibit variation of oxidation state from -3 to 5​

Answer 1

Answer:

NH3 converted into N2O5

Answer 2

Answer:

$4NH_3+8O_2\rightarrow 4HNO_3+4H_2O$

Explanation:

Oxidation number or oxidation state of an atom in a chemical compound is  the number of electrons lost or gained. It is also defined as the degree of oxidation of the atom in the compound.

This is a theoretical number which can help to decipher the oxidation and reduction in a redox reaction.

Nitrogen in ammonia, $NH_3$ is in oxidation state of -3 and in nitric acid $HNO_3$, nitrogen is in oxidation state of +5.  

The chemical reaction is:

$4NH_3+8O_2\rightarrow 4HNO_3+4H_2O$