Answer the question on the basis of the passage given below:

Molecular nitrogen is very little reactive chemically. During lightning discharge, atmospheric nitrogen and oxygen combine to form nitric acid which also combines with oxygen to form nitrogen dioxide. Both \(NO\) and \(NO_2\) constitute smog which is very poisonous. It can cause a burning sensation in the eyes and adversely affect the respiratory system.

Oxidation state of nitrogen in nitric acid and Nitrogen dioxide respectively is:

+5, +4

The correct answer is option 2. +5, +4.

\(\text{Nitric acid}\, \ (HNO_3):\)

Let the oxidation number of \(N\) in \(HNO_3\) be \(x\)

\(∴ 1 + x + 3 × (-2) = 0 \)

or, \(1 + x - 6 = 0\)

or, \(x = 5\)

\(\text{Nitrogen dioxide}\, \ (NO_2):\)

Let the oxidation number of \(N\) in \(NO_2\) be \(x\)

\(∴  x + 2 × (-2) = 0 \)

or, \( x - 4 = 0\)

or, \(x = 4\)